Answer:
false
Explanation:
The amount of radioactive isotopes contributing heat to Earth is less now than when Earth was newly formed because these isotopes have decayed over time, making the statement false.
The statement that the amount of radioactive isotopes contributing heat to Earth is greater now than it was when Earth was newly formed is false. Radioactive isotopes such as 238U, 235U, 40K, and 232Th have been providing heat to Earth's interior through radioactive decay. Initially, there were more of these isotopes when Earth was young, making the radioactive contributions and resulting heat greater. These isotopes decay over time, reducing their quantity and the heat they produce. Presently, the heat produced by radioactive decay is roughly 25% of what it was at Earth's formation.
Additionally, Earth's heat also comes from the initial deposit of heat left over from its formation and accretion, with energy contributions from impacts such as the one from Theia, which led to the creation of the Moon. However, it's the radioactive decay of primordial elements that still significantly contributes to Earth's internal heat, albeit less so than when Earth first formed.
When a scientist is conducting research about all the plants and wildlife in the Mojave Desert as well as the desert's resources, such as water and soil, the scientist is studying ____________________.A.) A community.B.) A population.C.) A species.D.) An ecosystem.
Answer:
D) An ecosystem
Explanation:
An ecosystem is a community of living organisms in conjunction with the nonliving components of their environment, interacting as a system. These biotic and abiotic components are linked together through nutrient cycles and energy flows.
Do cells become specialized through 1. Cell reproduction 2. Cell differentiation 3. Morphogenesis 4. Apoptosis
Answer:
Cell Differentiation is the process through which cells become specialized.
Think about the name, cells become different from one another, becoming specialized into different types.
WILL GIVE BRAINLIEST!! Describe the life cycle of a fern. please do not give me an answer copied and pasted from google or something. i want an answer that makes sense , an answer that is understandable. I WILL REPORT AND HAVE YOUR ANSWER DELETED! sorry if im being harsh im just a little stressed
Answer:
ok
Explanation:
there is two stages of a fern first i belive is called gametphite
"i probley spelt that soooo wrong FYI" well the spores are produced on theunderside of grown plants these will germinate and began to age into omost the shape of a heart or triangle "sorry i dont rightly remmber XD" and thoses would be called gametphites sorry if this is still stress full but heres the second stage well its the adult stage i belive well the fertile gametophite begans to look like almost a mossy substince after days-weeks pass the moss type stuff will turn well look like some young fronds as i can only exspain well it starts to come out of the moss and it will be very sunlight sensitive it will die quikly from over sunlight because the stems are so small it can dry out in a hour or 2
i hope this helped a little at least have a good day
: Imagine you have a butterfly population that consists of red- and bluewinged butterflies. The butterfly population you produce will live in a heavily vegetated area with light green leaves and white flowers. Suppose you are able to mate the individuals in your imaginary butterfly population. Your goal is to create a population of butterflies with high fitness.
which of the individuals below would express a recessive trait?
A.Bb
B.BB
C.bb
C. bb
They have two recessive genes and therefore will be expressed.
Even though Bb has one recessive gene it will not show because the dominate overtakes the recessive. They are a carrier of the recessive gene though.
Hope this helped!
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Why are well-defined reading frames critical in protein synthesis? A. Without a well-defined reading frame, the mRNA would be transcribed back into DNA. B. Without a well-defined reading frame, the ribosome is unable to bind to the mRNA. C. Without a well-defined reading frame, the peptide made from a given sequence could be completely different. D. Without a well-defined reading frame, the resulting protein would be transported to the cell surface.
Answer:
C
Explanation:
During the translation of an mRNA, it is read in a sequence of three nucleotides called codons. Therefore, a single strand of DNA or RNA will have three reading frames. Only one is biologically relevant and is referred to as the open reading frame because it is translated to the ideal protein. A shift in the reading of the frame can result in a wrong peptide.
When one DNA molecule is copied to make two DNA molecules, the new DNA
contains
A) 25% of the parent DNA.
B) 50% of the parent DNA.
C) 75% of the parent DNA.
D) 100% of the parent DNA.
E) none of the parent DNA.
what do we call a specific variant of a character?
A.gene
B.trait
C.locus
Answer:
Trait
Explanation:
We call a specific variant of a character a phenotypic trait.
Osmosis (pick the incorrect statement) Osmosis is the passive transport of water from an area of low solute concentration to an area of high solute concentration. The movement of water across a cell membrane requires transmembrane integral proteins. The osmotic pressure between two compartments is determined by the relative concentrations of the permeant solutes in the compartments. Cells regulate water and ion balance by actively transporting ions but not water.
Answer:
Cells regulate water and ion balance by actively transporting ions but not water.
Explanation:
Cells regulate water and ion balance by transporting the water molecules from a region of of high concentration to a region of low concentration passively. Active transport does not maintain the water and ion balance, so the last statement is incorrect.
Rest of the statements are correct.
In the first statement they are saying that in osmosis water from an area of low solute concentration moves towards an area of high solute concentration which is absolutely right. An area which has a low solute concentration has a high solvent concentration and vice versa. In osmosis, only solvent can move because osmosis occurs by means of a semi permeable membrane which does not let a solute molecule to pass by. So the area where solute is less, solvent is more and this solvent tends to move towards an area which has high solute concentration because a high solute concentration will have low solvent concentration .
Second statement is also correct. water cannot cross cell membrane because water is polar while cell membrane is non polar. Non polar cell membrane does not let water to pass through it because water is polar therefore water requires integral proteins named as aquaporins to cross cell membrane.
Statement third is also correct. The osmotic pressure is a measure of solute concentration of a particular compartment. The less is the solute in a compartment, the more will be the osmotic pressure. That simply means that osmotic pressure of a pure solvent will be highest because it does not have solute at all. In contrast to this, a solution will have comparatively low osmotic pressure because of the presence of solute in it.
The incorrect statement about osmosis is that water movement across a cell membrane requires transmembrane integral proteins. In reality, water can pass through the cell membrane via osmosis without the need for proteins. Osmosis maintains solute equilibrium on both sides of the membrane.
Explanation:The incorrect statement in your options about osmosis is that: The movement of water across a cell membrane requires transmembrane integral proteins. In truth, water can pass through the cell membrane via a process called osmosis without the need for proteins. Osmosis is the passive transport of water molecules from an area of low solute concentration to an area of high solute concentration. The aim is to maintain equilibrium in the solute concentration on both sides of the membrane. The osmotic pressure difference between two compartments is created by the relative concentrations of solutes that can pass through the membrane, known as permeant solutes. Cells do actively regulate ion balance and water via different mechanisms, not just by transporting ions.
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What is the term for any bipedal primate?
A. Human
O
O
B. Hominid
O
C. Homo sapien
O
D. Neanderthal
Answer:
B. Hominid
Explanation:
hominid refers to a family of primate
bipedal refers to using both legs for walking
The term for any bipedal primate is "hominid," which is in Option B as the hominids are a family of primates that includes all bipedal species of the human lineage, as well as their extinct ancestors and relatives.
What is a hominid?The term "hominid" refers to any member of the family Hominidae, which includes all species of bipedal primates that are related to modern humans, as well as their extinct ancestors and relatives. The Hominidae family is a subgroup of the larger group of primates known as hominoids. Hominids are characterized by their bipedalism, which means that they walk on two legs, and this is a unique characteristic that sets them apart from other primates. Walking on two legs freed their hands for other tasks, such as toolmaking, carrying objects, or caring for their young.
Hence, the term for any bipedal primate is "hominid," which is in Option B.
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Which events are most likely if an index fossil is found in a layer at location 1, but the layer and index fossil are not found at location 2 nearby, which is known to be the same relative age? check all that apply?
Answer:
The layer never formed at location 2.
The organism did not exist at location 2.
The missing layer at location 2 may have eroded.
What happens to the total population when the birth rate is at 40 and the death rate is at 15?
A. The population is decreasing significantly.
B. The population is moderately decreasing.
C. The population is increasing significantly.
D. The population is moderately increasing.
Answer: c. The population is increasing significantly
Explanation: The birth rate is the amount of live births per 1,000 people in a year or period. The death rate is the amount of deaths per 1,000 people in a population in a year. If we substract the death rate (15) from the birth rate (40) we obtain the rate of natural increase. The rate of natural increase in the example is 25 what neans that the population is increasing significantly.
Answer:
C
Explanation:
All glands in the body, such as salivary glands and the pancreas, are derived from which type of tissue
Answer:
Endoderm
Explanation:
The embryo has three germ layers. The ectoderm, mesoderm, and endoderm. The endoderm is the innermost layer. Other than the endocrine glands, the other tissues that develop from the endoderm are the gastrointestinal tract, urinary and auditory system, and the respiratory tract.
Which pair of chromosomes determines sex in humans?
A.15th
B.1st
C.23rd
Which activity occurs when a flowering plant reproduces?
Hello There!
Flowering plants reproduce through the process called pollination. There are many different types of pollination
Answer:
Flowering plants require the formation of reproductive structures and pollination.
Explanation:
For flowering plants to reproduce, first the reproductive structures have to form (pistils and stamens) and then the pollen has to be taken from the first flower to the second or where the fertilization will happen. There are several ways to pollinate, including insects, or bigger animals like bats. After the animal is taking the pollen to another flower, it is fertilized and starts to transform into a fruit, where, later the seeds will also be carried by animals.
Molecules like glucose and amino acids are not lipid soluble, so cannot cross the cell membrane by simple diffusion. Instead, they are shuttled across by carrier proteins in the membrane from high to low concentration. Does this process require energy from the cell? This is an example of what type of molecular movement?
Answer: this is called passive transport and it does not require energy.
A particular triplet of bases in the template strand of dna is 5′-agt-3′. What would be the corresponding codon for the mrna that is transcribed? A. 3 UCA 5 B. 3 UGA 5. C. 5 TCA 3 D. 3 ACU 5
Answer:
3 UCA 5
Explanation:
The 5' end of a strand pairs up with the 3' of its complimentary strand. So with this fact, we can rule out option C.
Now when you pair the DNA template with the mRNA template, remember that RNA contains uracil and not thymine. So the base pairings would be:
T = A
A = U
U = A
G = C
C = G
Based on this, the pairing would be like this:
5' A G T 3'
3' U C A 5'
The corresponding mRNA codon to the DNA triplet 5'-AGT-3' is 5'-UCA-3', which is option A. 3' UCA 5'.
Explanation:When transcribing DNA to mRNA, the bases are matched in the following way: adenine (A) pairs with uracil (U), thymine (T) pairs with adenine (A), cytosine (C) pairs with guanine (G), and guanine (G) pairs with cytosine (C). Therefore, for the DNA triplet 5'-AGT-3', the corresponding mRNA codon would be the complement of this sequence, transcribed in the antiparallel direction, which is 5'-UCA-3'. So, the correct answer is A. 3' UCA 5'.
I think I know it's the last 2 answers I just want to know am I right or am I missing an answer?
Which statements correspond correctly to sexual reproduction?
the potential combinations are unlimited
variations have no boundaries
new genetic information is originated at fertilization
variations remain within created kinds
all genetic information comes from preexisting genes
Final answer:
The correct statements relating to sexual reproduction are that the potential combinations are indeed unlimited, variations have no boundaries, and although new genetic combinations arise, all genetic information derives from preexisting genes, and variations remain within created kinds.
Explanation:
In sexual reproduction, the combination of genetic material from two parents leads to offspring that have unique genetic makeups. The processes that contribute to this diversity include crossing-over during meiosis, independent assortment of chromosomes, and the random union of gametes at fertilization. As a result, sexual reproduction has the potential to produce a vast array of genetic combinations.
Regarding the given statements, we can say that the following are correct:
The potential combinations in sexual reproduction are indeed unlimited.Variations indeed have no boundaries due to the random nature of genetic recombination and gamete fusion.While new genetic information is not exactly originated at fertilization, the unique combination of existing genetic information from two parents does create a new genotype.Variations do remain within created kinds, meaning species tend to produce offspring within the same species.All genetic information indeed comes from preexisting genes; the combination of these genes, however, results in unique individuals.if T=tall and t=short what will be the physical appearance of the offspring the cross below?
A.some will be tall and some will be short
B.they will all be tall
C.they will all be short
D.they will be medium height
Bodies of interplanetary debris that orbit the Sun with most in the area between Mars and Jupiter are called ____.
Question 3 options:
meteors
comets
asteroids
meteorites
Answer:
Bodies of interplanetary debris that orbit the Sun with most in the area between Mars and Jupiter are called comets.
Answer: Option (3)
Explanation: The region between the inner planets and the outer planets, i.e between Mars and Jupiter, there lies a belt known as the asteroid belt. These asteroids ranges in size from a few meters to hundreds of km. The asteroids in this belt, generally moves at a speed of about 80,000 km/hr and there occurs frequent collision between them.
Thus, the correct answer is option (3).
A short-lived structure formed during a collision is a[n] select one:
a. reagent.
b. catalyst.
c. inhibitor.
d. activated complex.
Answer:
d. Activated complexExplanation:
❣️个 jess bragoli 个❣️#keep learning!!The short-lived structure formed during a collision in a chemical reaction is known as the activated complex or transition state, which is a highly unstable arrangement of atoms with a brief lifespan.
Explanation:A short-lived structure formed during a collision in a chemical reaction is known as the activated complex or the transition state. This occurs when reactant particles collide with both proper orientation and sufficient energy. The activated complex is an unstable arrangement of atoms that exists at the peak of the activation energy barrier and has a very brief existence, around 10-13 seconds.
It can either revert to the original reactants or continue on to form products. This state is typically undetectable by standard analytical instruments, although sophisticated spectral measurements can sometimes observe these transition states.
There are many proposed solutions to traffic congestion in metropolitan areas. One solution has been prove ineffective: in fact, it promotes more cars and drivers on the roads. Which solution is it?
A) Automate the driving process itself.
B) Build more infrastructure including more roads, tolls, and car-pooling lanes.
C) Using wireless vehicle-to-vehicle communication, cars could talk to each other in an attempt to keep traffic flowing more smoothly.
D) A smartphone app that works like a social network for drivers, combining online maps with updates from other drivers about traffic jams, road works and accidents.
Answer:
B
Explanation
because its the correct answer and yeah i mean its obvious
Answer:
Option B, Build more infrastructure including more roads, tolls, and car-pooling lanes.
Explanation:
When an infrastructure is built it allows more vehicle to go through it. It proves to be useful only for some time just after the construction. However, in long run it again proves to be inefficient as efficient traffic management require efficient traffic planning and not construction of more infrastructure.
Also addition of infrastructure, increases the vehicular population thereby adding more vehicles to already existing mismanaged traffic.
Hence, option B is the right answer
What molecule does dna store the instructions for building
Answer: A gene
I'm pretty sure it's a gene because it's literally the instructions as to how the make up if a certain person would be.
DNA stores instructions for building proteins.
Explanation:The molecule that DNA stores instructions for building is called protein.
Proteins are large, complex molecules composed of amino acids. They play a crucial role in the structure, function, and regulation of cells and tissues. DNA carries the genetic code that determines the sequence of amino acids in a protein, and this information is used by cells to assemble a specific protein.
For example, the DNA instructions might code for a protein involved in muscle contraction, such as actin. Actin is a protein that forms the framework of muscle fibers, allowing them to contract and generate movement.
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Which of the following statements about amino acids is INCORRECT?
A turn or kink in a protein is more likely to be induced by a proline than by a glycine.
The more glycines that are found in a polypeptide's primary sequence, the more flexible the backbone of that polypeptide.
The bridge between cysteines, which connects parts of a protein, is a stable but noncovalent interaction.
Not every amino acid is asymmetric.
At typical cellular pH, the R groups of basic amino acids are positively charged.
Answer:
The answer is: The bridge between cysteines, which connects parts of a protein, is a stable but noncovalent interaction.
Explanation:
Hope my answer has helped you!
Final answer:
The incorrect statement is that the bridge between cysteines in proteins is a noncovalent interaction; it is actually a covalent bond known as a disulfide linkage, crucial for protein tertiary structure stabilization.
Explanation:
The incorrect statement among the choices provided for amino acids is that the bridge between cysteines, which connects parts of a protein, is a stable but noncovalent interaction. In truth, the bridge between cysteine residues is formed by a covalent bond known as a disulfide linkage. This link is a result of the oxidation of two cysteine molecules, which combine to form cystine, and it is significant in stabilizing a protein's tertiary structure.
A turn or kink in a protein is indeed more likely to be induced by a proline than by a glycine, due to proline's ring structure. Glycine, having a single hydrogen atom as its side chain, is small and allows flexibility in the protein structure, making the backbone of the polypeptide where glycines are present more flexible. Not every amino acid is asymmetric; for instance, glycine is not chiral. At typical cellular pH, the R groups of basic amino acids such as lysine and arginine are indeed positively charged.
Which feature allows rockweed to withstand the constant wave action of its environment?
Residential construction is expanding in Florida, the expansion has caused fragmentation of habitats, one of the results of the increased construction is a decrease in the number of large predators such as the coyote, black bear and pool panther, which will be the most immediate local result of this fragmentation? 1)large predators will become extinct 2)decrease in middle sized predators 3)increase in population of top carnivores 4)increase in population of prey species
Answer: 1 ) large predators will become extinct
Explanation: Due to the expansion of residential construction in Florida these large predators will have no place to live and eventually die, leading to an extinction.
Answer: 1) Large predators will become extinct.
Explanation:
A predator is a organism which kill other organism to obtain it as food. The organism which is killed is prey. The predators are carnivores organisms, which means they are flesh eating organisms.
According to the given situation, the residential construction in Florida is the limiting factor for the growth and abundance of predator population. This has resulted in the decrease in the population of predator species. Hence, many predator species will extinct immediately due to habitat fragmentation.
why did the finches found on the galapagos islands have different shaped beaks?
A.the birds were not all finches
B.the birds evolved at different times
C.the birds had different diets
C. The birds had different diets. The bird's beaks evolve depending on their diet!
Sunny~ ☺
Answer:
c. the birds have different diets
Explanation:
The research that Darwin had at Galapago´s Islands, brought up several questions about why are living species the way they are. As part of the theory of Natural Selection, Darwin supported that the physical characteristics of the individuals are strictly related with their function. For example, the shape of the beak of the finches, which is a consequence of evolution, has a strict relation with the type of diet they have and as a consequence, the adaptation they will have in their environment.
One of the major complications of diabetes is delayed wound healing. People with diabetes also often experience neuropathy—numbness or loss of sensation on the extremities—especially the feet. What medical complications can arise from slow wound healing and neuropathy of the feet?
Explanation:
Slow healing : pathogens can enter the open wound and cause infections, worsening the wounds. If the problem continues, parts of body will require removal(cutting off).
Neuropathy: as the sensations are loss, receptors no longer react to contact stimuli & reflexes can't be conducted on time for survival pruposes. For example, if the skin touches a hot object, the receptors on skin will not react to the heat & remove itself away from the stimuli.
One of the major complications of diabetes is delayed wound healing. People with diabetes also often experience neuropathy—numbness or loss of sensation on the extremities—especially the feet. The slow wound healing can cause infection and neuropathy can cause complete loss of feeling.
What are peripheral neuropathy and infection?Peripheral neuropathy is one of the common causes of diabetes. It is the result of damage to peripheral nerves which leads to numbness, pain, and weakness in hands and legs.
Wounds that are not healing or wounds that are very slow healing are caused majorly by diabetes because they have a problem with the activation of the immune system.
If the immune system cannot function in the right way, then wound healing can take more time and are at high risk for infection.Peripheral neuropathy also known as diabetic neuropathy on the other hand is another severe issue a diabetic person can experience.Peripheral neuropathy can ultimately cause no feeling in hands and legs that can make them paralyzed at some point of their lifetime.To learn more about diabetes, refer:
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Name the Organism interaction and relationships that we often see in living organisms
Select the correct statement about chemical energy, a term used by biologists to refer to potential energy available for release in a chemical reaction. Light energy is converted to chemical energy during photosynthesis. When a glucose molecule is catabolized to CO2 and H2O, chemical energy is lost. A photosynthetic cell within a plant leaf produces chemical energy, stored within glucose molecules.
Answer:
A photosynthetic cell within a plant leaf produces chemical energy, stored within glucose molecules.
Explanation:
The energy captured from sunlight by Photosystems in chlorophyll is used to split a water molecule and reduce carbon dioxide to carbohydrates. This energy from sunlight is therefore stored in the chemical bonds of the glucose molecules. It is thereafter harnessed during cellular respiration when the chemical bonds of glucose are broken and the energy transferred to make ATP molecules.
Answer:
Option A , Light energy is converted to chemical energy during photosynthesis.
Explanation:
In the process of photosynthesis, a plant containing chlorophyll converts solar light energy into chemical energy.
The common reaction of photosynthesis is
Carbon dioxide + Water + energy from sun ------> Glucose + carbon dioxide
Thus, energy from sun is used to excite photon with in the thalokoid of plant cell to initiate photosynthesis and then as a result of this process food (glucose containing chemical energy ) and carbon dioxide is formed.
Hence, option A is correct