Final answer:
Short plants reappeared in the F2 generation because they inherited two recessive alleles for shortness after the F1 generation plants self-pollinated and segregated alleles during gamete formation.
Explanation:
Short plants reappeared in the F2 generation of Mendel's experiments because the trait for shortness, although hidden in the F1 generation, is a recessive trait that can manifest when two recessive alleles are present.
In Mendel's first experiment, a tall plant (dominant trait) was crossed with a short plant (recessive trait), resulting in F1 offspring that were all tall because they had one tall allele and one short allele (Tt), with the tall trait being dominant.
When the F1 generation plants self-pollinated, some of their offspring (F2 generation) received two short alleles (tt). According to Mendel's law of segregation, these F2 offspring exhibited the short phenotype because they lacked the dominant tall allele.
In which phase of mitosis do the sister chromatids separate at their centromeres? telophase metaphase anaphase prophase
Answer: anaphase
Explanation: The mitosis is the process by which cells are divided. That division has different phases.
It is during the anaphase that the sister chromatids are separated at the centromere and are pulled towards opposite poles of the cell by the mitotic spindle.
During mitosis, sister chromatids separate at their centromeres in the anaphase. This separation is essential for each daughter cell in the cell division process to receive an identical set of chromosomes.
Explanation:In mitosis, the phase in which sister chromatids separate at their centromeres is anaphase. During this phase, the paired centromeres of each sister chromatid separate, and the now individual chromosomes are pulled apart towards the opposite ends of the cell. The movement is facilitated by the shortening of microtubules, structures of the spindle fibers. The chromosomes' movement to opposite poles of the cell ensures that each daughter cell will receive an identical set of chromosomes during cell division.
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Please!! I really need help with this! Its due tomorrow!! Answer this question please!!!!!!
Explain in complete detail how the process of photosynthesis and respiration go hand to hand?
Cellular Respiration is the making of energy in the mitochondria. Photosynthesis is the production of oxygen in the chloroplasts. Their reactants are the products of each other.
which is a combination of two waves
While longitudinal waves resemble sound waves in that they alternate between compressions and rarefaction in a medium, transverse waves are like those on the surface of water that rise and fall.
What are the different combination of waves exist?Standing waves, also known as stationary waves, are combinations of two waves with the same amplitude and frequency that are traveling in opposite directions.
The phenomenon is caused by interference, which means that when waves are superimposed, their energies either add up or cancel each other out.
Standing waves are created by the superposition of two or more opposing-moving waves. The superposition of two or more waves traveling in the same direction results in standing waves.
Therefore, the combination between P wave and S wave is called standing wave. It occurs when both waves have equal amplitude and wavelength.
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A worm is living inside a cow and stealing nutrients from the cow's body, causing the cow to become malnourished. What type of symbiotic relationship is this? A. Mutualism B. Parasitism C. Commensalism D. Biologism
Answer:
B. Parasitism
Explanation:
Parasitism is a type of symbiotic relationship that exists between two different species. In this relationship, one organism (the parasite) lives in or on another organism (the host). The parasite gains benefits, while the host is harmed and do not gain any benefit. From the question, the type of symbiotic relationship that exists between the worm and the cow is parasitism. The worm which lives inside the cow and benefits from the interaction is the parasite, while the cow that is harmed (malnourished) is the host.
Answer:
B. Parasitism
Explanation:
Parasitism is a not harmonical ecological relationship, that is, an interaction between living beings, one of which benefits from obtaining food while another is harmed.
The parasite is a living being that associates with another, which is called a host. The parasite uses the host to feed, causing disease. In many cases, the damage caused is usually not very serious, since if the host dies if the parasite will die as well.
who is charles darwin and his theory of natural selection
Answer:
Charles Darwin was a naturalist from the 1800's. He developed the theory of natural selection which became the foundation of modern evolutionary studies. Natural selection is the survival and reproduction of individuals and how they adapt.
What is the primary function of a plant's root hairs?
a
Root hairs move water and minerals up.
b
Root hairs prevent excessive loss of water.
c
Root hairs move food particles up and down.
d
Root hairs provide a larger surface area for absorption.
i think it’s B if not then it’s C
Final answer:
The primary function of a plant's root hairs is to provide a larger surface area for the efficient absorption of water and minerals from the soil. Root hairs increase the root's surface area, enhancing the plant's absorption capabilities.
Explanation:
The primary function of a plant's root hairs is to provide a larger surface area for the absorption of water and minerals from the soil. Root hairs are extensions of root epidermal cells, which play a crucial role in enhancing a plant's ability to absorb these essential nutrients. The epidermis of the root provides protection and aids in absorption, while the root hairs increase the surface area available for these processes.
Negative water potential draws water into the root hairs, and the cohesion and adhesion properties of water help it to move up the plant through the vascular system, which includes the xylem and phloem. Transpiration, the process of water evaporating from leaves, also plays a part in drawing water up through the plant, from the root hairs to the leaves.
Which number shows regions where flat landforms with high elevation and low reliefs are found? A:1 B:2 C:3 D:4
Answer:
D
Explanation:
The disease allele for a certain disease is S. The normal allele is s. The disease is observed when a person has at least one copy of the disease allele, S. Which pattern of inheritance does the disease follow?
CODOMINANT
DOMINANT
POLYGENIC
RECESSIVE
Will mark brainliest
Answer:
I believe is "recessive".
Answer:
dominant
Explanation:
How do mutations occur in the genetic code
Answer:
Mutations in genetic code occurs when DNA is being duplicated.Any changes in the base pairs leads to mutations by trasition or transversion. Change in amino acid leads to change in sequence and thus, mutation. This si carried on to new generation, if it takes place in germ cells.
Mutations occur in the genetic code by substitution, deletion, insertion, duplication, insertion, and translocation.
Substitution: A nucleotide is replaced by a different nucleotide, resulting in a change in the DNA sequence. Insertion: An extra nucleotide is inserted into the DNA sequence, causing a shift in the reading frame.
Deletion: A nucleotide is deleted from the DNA sequence, causing a shift in the reading frame.
Duplication: A segment of DNA is duplicated, leading to an increase in the number of copies of a particular DNA sequence.
Inversion: A segment of DNA is flipped in orientation, changing the order of nucleotides.
Translocation: Genetic material is exchanged between non-homologous chromosomes, resulting in the rearrangement of genetic sequences.
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Which of these is the source of nutrients for an autotroph?
Answer:
inorganic substance
Explanation:
Answer:
inorganic substances
Explanation:
Which statement is INCORRECT about invasive species? A) The populations often grow quickly. B) They are often competitively inferior. C) In their introduced area, there is often no predators. D) They usually cause harm to their introduced environments.
They are often competitively inferior.
Answer is B)
They are often competitively inferior is incorrect about invasive species .
Option B
Explanation:
Invasive Alien Species are those species that are not native to a particular area and can damage the environment in which they reside. Invasive species could be a plant, fungi, or animal. These species tend to spread at a rapid pace in the environment. Various reasons lead to faster expansion, faster reproduction, absence of a predator species, etc. The plant invasion created a barrier in the growth of native species and can also become a reason for various diseases in the native environment.
Hence, we can say that option B is correct as all other options are traits of Invasive Alien Species and they are often competitively superior.
According to cell theory where do plant cells come from
Answer:
All cells come from pre-existing cells by cell division. Schwann also proposed “Free Cell Formation” or spontaneous generation of cells — this was before Pasteur's definitive experiments. Modern Cell Theory Also States: Life's chemical processes, such as metabolism, occur inside of cells.
Explanation:
Answer:
Other cells
Explanation:
All living things are made up of one or more cells. all living cells arise from pre-existing cells by division.
The leopard frog and the pickerel frog are two
closely related species. In areas where
their ranges overlap, the frogs will remain
separate species if they
Answer:
They will remain separate species if they don't breed.
Explanation:
The diagram above shows a pyramid of numbers for a Jack pine forest community. The number of producers is much lower than those of the primary consumers. How can this be? A) The Jack pine level of the pyramid represents the amount of energy produced by the trees, not the number of trees. B) The biomass of trees is much greater than smaller producers, like grasses and shrubs. One tree can support many primary consumers. C) The Jack pines, the autotrophs, would typically have the highest number of organisms with each level above it containing roughly 90% less. D) The pyramid represents the size of the organisms; in this case, the Jack pine tree. The pyramid does not represent the comparative number of organisms.
Answer:
B) The biomass of trees is much greater than smaller producers, like grasses and shrubs. One tree can support many primary consumers.
Explanation:
Answer:
b
Explanation:
pneumothorax is a condition in which a puncture has allowed aur to enter the chest cavity. the air puts pressure on the lungs preventing them from expanding. why would this cause short and shallow inspiration?
A) lung volume cannot decrease as much and so air pressure cannot increase
B) lung volume cannot increase as much and so air pressure cannot decrease
C) lung volume cannot increase as much and so air pressure cannot increase
D) lung volume cannot decrease as much and so air pressure cannot decrease
I think its b because it can hurt your tissues and it will cause you not to breathe
Answer:
B) lung volume cannot increase as much and so air pressure cannot decrease
Explanation:
If air will enter the chest cavity then lung will not find proper space to expand. As we all know that pressure and volume both have inverse relation that means an increase in volume leads to decrease in pressure. In short, if volume increases, pressure decreases.
In normal condition, if air enters lungs, the lungs withstand the increased air pressure by expanding themselves. Expansion of lungs volume reduce the pressure which air exerts on them.
But, in pneumothorax condition since the chest cavity where lungs are situated is filled with air so when air will enter the lungs, the lungs will not find required space to expand and air pressure will not decrease leading to short and shallow inspiration.
In a series of experiments, Avery treated heat-killed nonvirulent S bacteria with enzymes that degraded the proteins, DNA, and RNA of the S bacteria, then mixed this with nonvirulent R bacteria. S cells grew in all cases except the samples with degraded DNA. What did this demonstrate?
A. Protein, DNA, and RNA from the S bacteria are all necessary for bacterial transformation to occur.
B. Protein from the S bacteria is necessary for bacterial transformation to occur.
C. DNA from the S bacteria is necessary for bacterial transformation to occur.
D. RNA from the S bacteria is necessary for bacterial transformation to occur.
Answer:
The answer is C. DNA from the S bacteria is necessary for bacterial transformation to occur.
Explanation:
When heat-killed nonvirulent S bacteria will be treated with enzymes that degraded DNA it will destroy the genetic information required for cell survival. DNA is very essential for an organism and is called the molecule of life. DNA degradation is also a part of cell death called apoptosis. That's why all the samples grew except the one where DNA was enzymatically degraded.
Answer:
C. DNA from the S bacteria is necessary for bacterial transformation to occur.
Explanation:
Penn foster
Characteristics such as strength or the ability to find food often become more common in populations over time because individuals with these traits are more likely to thrive. What mechanism of evolution causes this change? -APEX
A. Genetic drift
B. Artificial selection
C. Natural selection
D. Mutation
Natural selection because natural selection selects the trait that causes a species to thrive the most, genetic drift isn’t correct because it mostly has to do with physical traits and not traits that help with hunting, finding mates, and finding food.
Answer:
C: Natural Selection
Explanation:
Hope this helps
Question 2
What is the difference between a non-mutated gene and a mutated gene?
The sequence of DNA bases is different.
The sequence of DNA bases has been removed.
Adenine pairs with guanine or cytosine; guanine pairs with adenine
Non-mutated genes express traits; mutated genes remove traits.
Answer: It's A. The sequence of DNA bases is different
The sequence of DNA bases is different for a non-mutated gene and a mutated gene.
What is a gene?The basic physical and functional unit of heredity is known as a gene. It is made up of DNA. Some genes act as instructions to make molecules called proteins but many genes won't code for proteins. In humans, the size of the genes varies from a few hundred DNA bases to more than 2 million bases.What is a non-mutated gene?It is a gene that is found in its natural, unchanged form.
What is a mutated gene?A gene mutation is a change in one or more genes and some can lead to genetic disorders or illnesses like sickle cell anemia, cancer, hemophilia.. etc.Gene mutation is an alteration of the nucleotide sequence of a gene.Caused by errors in DNA replication and mutagens such as UV and chemicals.What is the difference between a non-mutated gene and a mutated gene?
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If events A and B are DEPENDENT, then A) A and B must occur together. B) A and B cannot occur together. C) A's occurrence can affect the probability of B's occurrence. D) A's occurrence cannot affect the probability of B's occurrence.
Final answer:
If events A and B are dependent, it means that A's occurrence can affect the probability of B's occurrence.
Explanation:
If events A and B are dependent, it means that A's occurrence can affect the probability of B's occurrence. In other words, the probability of B happening is not the same whether A happens or not. For example, let's say event A is rolling an even number on a fair die and event B is rolling a number greater than 4. If event A occurs and we roll an even number, the probability of event B happening (rolling a number greater than 4) is now reduced, because there are fewer numbers greater than 4 among the even numbers. Therefore, the correct answer is C) A's occurrence can affect the probability of B's occurrence.
interactions between a lettuce plant and a rabbit?
Answer: Different rabbits have different food preferences, just like humans. Generally speaking, rabbits like sugary foods best of all, so you could say rabbits like fruit best, then carrots, then lettuce.
What a rabbit likes to eat isn't necessarily what's good for them to eat. Rabbits should mostly eat hay, plus some rabbit pellets and fresh leafy greens (like dark-coloured lettuces) every day. Treats (like fruit and carrot) can be served in strict limitation because too much can make the rabbit ill.
Explanation:
Do rabbits eat lettuce?
No it's very bad for them but they can eat romaine lettuce.
More Info:
Wild rabbits do eat lettuce when they come across it but it isn't a major part of their diet. Pet rabbits can eat some kinds of lettuces sometimes.
Which region has the highest elevation? Help please
Answer:
Great pond mountain.
Explanation:
Answer:
Explanation:
Pond Mountain since the elevation is of 1030km while the rest of the heights fall under this number
Please correct me if I am wrong
whats the middle layer of the ocean
Answer:
Bathypelagic Zone
Explanation:
This zone occurs above the Abyssopelagic zone and below the Mesopelagic zone. The zone is dark because little light reached this region. Only a small proportion of the higher frequency visible light (red light)reaches this region. The sea creatures in this region will be predominantly back or red in color.
1. If there is not enough carbohydrate intake, how does the body form glucose?
2. If there is a glucose shortage, how does the body produce energy?
1.
Glycogenolysis(break down of glycogen to glucose molecules)Gluconeogenesis(generation of glucose from certain non-carbohydrate carbon substrates such as lipids)2.
It can make glucose and then use thatUse lipids(some organs such as the brain can’t use lipids as their energy source and need glucose)Hope this helps:))
What is a major difference between prokaryotes and eukaryotes?
Answer:
Eukaryotic cells contain membrane-bound organelles, including a nucleus. Eukaryotes can be single-celled or multi-celled, such as you, me, plants, fungi, and insects. Bacteria are an example of prokaryotes. Prokaryotic cells do not contain a nucleus or any other membrane-bound organelle.
Explanation:
Who secures a crime scene?
A. Coroner's Assistant
B. Paramedic
C. Detective
D. Police Officer
I think it is a police officer, correct me if I am wrong.
I believe it’s a detective
Please help ASAP,
(first to answer correctly gets brainlytist)
-Describe three dangers of a hurricane. What things can people do to stay safe if a hurricane is heading toward their town?
Answer:
danger 1 wrecking peoples homes and property. danger 2: flooding danger3: people getting hurt
Explanation:they can stay safe y evacuating.
What unifying theme brought the work of Mendel and Darwin together in the big picture of
biology?
A:Discovery of DNA as the genetic material
B:Development of cell theory
C:Development of rDNA technology
D:Development of the chromosome theory of inheritance
Answer:
A: Discovery of DNA as the genetic material
Explanation:
DNA is the genetic material and stretch of DNA that codes for a specific protein is called as gene. Discovery of DNA as genetic material provided the physical proof of Mendel's factors that were responsible for transmission of genetic traits in his experiment.
Discovery of DNA as genetic material also established that genetic variations among individuals of the species as described by Darwin are due to minor differences in their DNA molecules.
Hence, discovery of DNA as genetic material led to acceptance of both Mendel's law and Darwin's theory.
Where does gas exchange occur?
left ventricle
left atrium
trachea
lungs
gas exchange occurs in the human lungs.
the answer is lunges
Which climates have very low levels of precipitation? Check all that apply.
dry
polar
highlands
temperate marine
temperate continental
I believe the answer is dry and highlands. They have very low levels of precipitation.
Answer:
The correct answer would be Dry and polar climates.
Explanation:
Steppes and deserts comprise the regional part of the earth that is characterized by dry climates. Dry climates are semiarid or arid areas that have 3 major characters which are very low precipitation, high evaporation rates, and wide temperature swings both seasonally and daily.
Polar climates are windy, cold and dry. The lack of precipitation or very low precipitation and low temperatures is the reason that the Arctic and Antarctic are said to be the world's largest Polar deserts.
Thus, the correct answer would be Dry and polar climates.
Station 2! Help pls!
1. Which Kingdom contains cells that are surrounded by cell walls and make their food through photosynthesis?
A. Animal
B. Protist
C. Plant
D. Fungi
2. The ____ kingdom contains organisms with an enclosed nuclear membrane such as amoeba and paramecium.
A. Protist
B. archeabacteria
C. eubacteria
D. Fungi
3. The ____ kingdom contain members that are made of many cells that get their energy by eating other organisms.
A. Protist
B. Fungi
c. Plant
D. Animal
4.The members of the ____ kingdom reproduces by spores and get their energy by feeding on living or dead organisms.
A. Plant
B. Fungi
C. Protist
D. Animal
1) Answer is C
2) Answer is A
3) Answer is D
4) Answer is B
The kingdom having cells surrounded by cell walls is the plant kingdom. The protist kingdom contains organisms with an enclosed nuclear membrane such as amoeba and paramecium, Animal kingdom contains members that are made of many cells that get their energy by eating other organisms, and the Fungi kingdom reproduces by spores and gets their energy by feeding on living or dead organisms. The answer for 1 is C, 2 is A, 3 is D, and 4 is B.
What is the kingdom?In biology, a taxonomic rank that is composed of smaller groups called phyla is referred to as a kingdom.
The kingdom having cells surrounded by cell walls is the plant kingdom. The protist kingdom contains organisms with an enclosed nuclear membrane such as amoeba and paramecium.Animal kingdom contains members that are made of many cells that get their energy by eating other organisms.The Fungi kingdom reproduces by spores and gets their energy by feeding on living or dead organisms. Answer for 1 is C, 2 is A, 3 is D, and 4 is B.Thus, the answer for 1 is C, 2 is A, 3 is D, and 4 is B
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