Answer:D
Explanation:
Answer:
D) Radiation kills cancer cells and healthy cells
Explanation:
In an ecosystem which of these is not recycled?
Water
energy
carbon
nitrogen
- Energy
"Matter is recycled, but energy is not. In an ecosystem, matter is represented by the presence of biogeochemical elements such as Hydrogen, Carbon, Nitrogen, Oxygen, Phosphorus and Sulfur."
In an ecosystem which of these is not recycled energy. Thus, option "B" is correct.
What is Biodiversity?Biodiversity has three levels - ecosystem, species and genetic diversity. Therefore, Biodiversity can be defined as the variability among living organisms involving terrestrial, marine, and other aquatic ecosystems, genes and alleles in a species and their ecological complexes such as diversity within species, and between species of the ecosystems.
Thus, option "B" is correct.
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(03.02 MC)Which of the following statements describes what occurs with energy as a result of the Law of Conservation of Energy?
A. The amount of energy before a process occurs is less than the energy after the process occurs.
B. The amount of energy before a process occurs is greater than the energy after the process occurs.
C. The amount of energy before a process occurs is equal to the energy after the process occurs.
D. The amount of energy before and after a process occurs is always equal to zero.
Answer:
The amount of energy before a process occurs is equal to the energy after the process occurs.- C.
Answer:
C
Explanation: i got it right on the exam
In an endothermic reaction products are_in potential energy and stable than reactants.
In an endothermic reaction products are in potential energy and stable\ higher than the reactants.
What is endothermic reaction?Endothermic reaction is a reaction in which the system absorbs the energy from its surrounding in the form of heat.
In an endothermic reaction, the enthalpy H of the system increases.
The potential energies of products are higher than the potential energies of reactants in the endothermic reaction.
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According to cell theory, viruses are considered nonliving because they
Answer:
lack the ability to reproduce without a host
Explanation:
Viruses are considered nonliving according to cell theory because they are acellular, do not carry out metabolism independently, and cannot replicate without a host cell.
According to cell theory, viruses are considered nonliving because they do not meet the several criteria traditionally associated with living organisms. Here are some key reasons:
Viruses are acellular, meaning they contain no cytoplasm or cellular organelles.They carry out no metabolism on their own and must replicate using the host cell's metabolic machinery.Viruses cannot replicate on their own; they require a host cell to manufacture more viruses.While viruses do contain genetic material in the form of DNA or RNA, they lack the cellular components necessary for metabolic processes and homeostasis. They can only reproduce by co-opting the host's cellular machinery, which means they cannot maintain an independent existence like living cells. Therefore, most scientists do not consider viruses to be living organisms.
Embryonic stem cells are cells derived from an embryo. These cells can be used to create new tissues for patients suffering from certain illnesses and disorders. Which statement best summarizes why the use of embryonic stem cells could be seen as unethical?
A.
Some people consider embryos to possess rights equal to those of fully developed human beings.
B.
Extracting stem cells from embryos is a very energy-intensive process, which consumes resources that could be used elsewhere.
C.
Embryos are difficult to obtain, so the monetary cost of using them for research outweighs their benefit.
D.
The process of extracting stem cells from embryos generates biohazardous waste that cannot be safely disposed of.
Answer:
Option A, Some people consider embryos to possess rights equal to those of fully developed human beings.
Explanation:
When stem cells are derived from embryo, the embryo dies in lieu to end of its cell development and this happens because stem cells are the only cells that have potential to develop an embryo by producing more stem cells and differentiating them into specific organs.
In most of the study, embryonic stem cells are derived from embryos that are obtained from IVF technique as an spare embryo. But this act is considered unethical as embryos have life within them and hence they also have rights equal to a fully developed human being.
Hence, option A is correct.
Answer:
A for plato
Explanation:
Compare the two theories regarding the evolution of dinosaurs and then consider the cladogram above. Although the two theories differ on the evolutionary path of dinosaurs, they agree that
A) dinosaurs, reptiles, and birds had a common ancestor.
B) dinosaurs evolved much later than birds or reptiles.
C) the branch containing dinosaurs evolved before either reptiles or birds.
D) dinosaurs should be on the same main branch as snakes, lizards and crocodiles.
Answer:
A) dinosaurs, reptiles, and birds had a common ancestor
Explanation:
The dinosaurs have not evolved as a separate phylum that has not close relations with other animals, but instead they share a common ancestor with the likes of the reptiles and the birds. The reptilians have actually emerged before the dinosaurs, but the dinosaurs managed to take up the top niches in the food chain after they appeared never the less. The birds on the other hand are actually an evolutionary product of the diversification of the dinosaurs. the birds have actually evolved from small bipedal dinosaurs, that over time started to take up new way of life and appearance in order to conquer the skies.
Answer:
A
Explanation:
How are the testes and ovaries similar? A. Both produce sex cells. B. Both store mature sex cells. C. Both transport sex cells from their site of production. D. Both connect internal reproductive organs to the exterior.
Answer:
A. Both produce sex cells.
Explanation:
The testes are the male sex glands, because they produce male sex cells (sperm) and male sex hormones (testosterone). Their female equivalent would be the ovaries, which produce the ovules and the various female sex hormones.
Answer:
B
Explanation:
A farmer observed that an increase in the nitrogen content of the soil in a field was followed by an increase in producer productivity. What does this observation most likely indicate about the relationship between nitrogen and the producers in the field?
1Points
A
Nitrogen was a biotic factor.
B
Nitrogen was a limiting factor.
C
Nitrogen became a surplus resource.
D
Nitrogen became a selection pressure.
Answer:
Nitrogen was a limiting factor
Which one of the following pair of alleles shows homozygous dominate genotype TT Tt tt
Answer:
TT
Explanation:
Dominant alleles are the ones in uppercase and recessive in lowercase, but we see one that has uppercase and lowercase. Well, it is heterozygous. Homozygous are genotypes that have two equal alleles, like tt or TT. Heterozygous have two different. Tt is heterozygous TT is homozygous dominant. Also tt are homozygous recessive, which means that it has both non-dominant alleles.
The allele is defined as the variant form of the gene, which is present on the same locus of chromosome as the gene.
Alleles and Their Makeup Alleles codes for two or more different traits. The combination of alleles can be heterozygous or purebred.
The heterozygous pair includes one dominant and one recessive allele, whereas the purebred genotype involves either both dominant or both recessive.In the following pair of alleles, the genotype of the purebred dominant trait is TT.
Thus, the genotype of the allelic pairs is used to study the traits of generations. TT is the dominant purebred genotype of the given allele.
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what part if the reproductive system is highlighted below
Answer:
B: Epididymus
Explanation:
The highlighted part represents Epididymus of male reproductive system in human. It is a coiled tube like structure present at the top of each testes in human males. Sperm are produced in seminiferous tubules of the testes and are transported from rete testes to epididymus. Function of epididymus is to storage the sperms and to serve as site for their final maturation.
Epididymus is highlighted below in the reproductive system. Hence the correct option is b.
The epididymis is a crucial component of the male reproductive system, responsible for the maturation and storage of sperm. It is a tightly coiled tube located on the posterior surface of each testis. Sperm produced in the testes are not immediately capable of fertilization. They must undergo a process of maturation within the epididymis, which involves acquiring motility and the ability to fertilize an egg.
The epididymis is divided into three segments: the head, body, and tail. The head receives immature sperm from the testes, and as sperm move through the body and tail regions, they undergo changes that enable them to swim and navigate through the female reproductive tract during fertilization.
Furthermore, the epididymis serves as a storage site for mature sperm, capable of being released during ejaculation. When sexual arousal triggers ejaculation, the epididymal muscles propel the sperm into the vas deferens, a duct that carries sperm from the epididymis to the urethra. Hence the correct option is b.
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The liver of a dog has been found to have higher than normal cell death because the DNA is damaged. What part of the cell failed to do its job of protecting the DNA of the cell? A. Nucleolus B. Chromosomes C. Nuclear envelope D. Nucleus
The answer is Nuclear envelope.
Basically, the Nuclear envelope is an outer shell that protects the cell (which includes the dna) from any harmful things.
Answer: Nuclear envelope.
Explanation:
The nuclear envelope helps in protecting the nucleus from getting damage. The DNA resides in nucleus of the cell.
It is the main hereditary material which transfers the genetic materials from one generation to another generation.
If the nuclear envelope is damaged then the DNA inside it will be protected. So, to protect the DNA the nuclear envelope should not be damaged.
Which substance is a compound? water gold oxygen hydroge
Answer:
Water
Explanation:
An element is a substance which cannot be split into further elements. Such substances contain single type of atoms. For example, gold, oxygen and hydrogen etc.
A compound is formed of chemical combination of two or more elements. For example water is a compound formed by chemical combination of hydrogen and oxygen elements.
Water is a compound made up of two elements, hydrogen and oxygen, chemically bonded together.
Explanation:Out of the given options, water is a compound. A compound is a substance made up of two or more elements chemically combined in a fixed ratio. Water (H2O) is made up of two elements, hydrogen (H) and oxygen (O), chemically bonded together. In contrast, gold, oxygen, and hydroge (assuming it was meant to be hydrogen) are elements, not compounds. Gold (Au) is an element, oxygen (O2) is composed of two oxygen atoms and is also an element, and hydrogen (H2) is also made up of two hydrogen atoms and is an element as well.
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is heat carried by the blood to the cells or away from the cells?
Answer:
excessive heat carried by the blood away from the cells..
Explanation:
because the heat would cause cell destruction, depending on circumstance..think of homeostasis..the body's way of keeping the body at a normal level...
Excessive heat is carried away from the cells. If heat is carried to the blood cells it would lead to cell destruction.
What is Heat?Heat is a form of energy. It is transferred from higher body temperature to lower body temperature. Heat transfer is the process of thermal energy exchange due to temperature differences.
Heat transfer takes via three modes conduction, convection, and radiation. In the human body, heat transfer takes place via conduction. The organisms maintain the body temperature of the body by thermoregulation.
Thermoregulation is a biological mechanism by which organisms maintain their internal body temperature.
Therefore, Excessive heat is carried away from the cells. If heat is carried to the blood cells it would lead to cell destruction.
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11. The behaviors and physical characteristics of
species that allow them to live successfully in their
environment are called ____.
Answer:
11. The behaviors and physical characteristics of species that allow them to live successfully in their environment are called adaptations.
Explanation:
Adaptations are a process that organisms go through to become better suited for their environment to help them be better suited to survive.
Which kingdom of organisms is most closely related to fungi?
Answer:
Kingdom Animalia
Explanation:
Answer:
Animalia kingdom is most closely related to fungi
Explanation:
The fungi kingdom was considered as a close relative to plants. The DNA and phylogenetic analysis shows that the fungi kingdom is more similar to kingdom animalia.
The both the kingdoms are not able to make their own food. The animalia and fungi are are consumers. Thus, fungi is closely related to animalia.
write any two points to justify that urbanization brings energy crisis
Answer:
Increase in urbanization means an increase in the usage of industrial products. This results in consumption of more fuel by industries in order to massively scale up the production of such goods and meet the rising demand.
As a result of urbanization, the lifestyle of people has also greatly changed, promoting more usage of automobiles which increases pollution and also, encourages more usage of fuel.
The Venn diagram details some of the helpful and harmful effects of bacteria. In what ways are viruses like bacteria?
A. Viruses are also pathogenic
B. Viruses are also decomposers
C. Viruses are also prokaryotes
D. Viruses can also cause food to spoil
Based on the image you provided, the way viruses are most like bacteria is that A. Viruses are also pathogenic.
Based on the Venn diagram you sent, the way viruses are most like bacteria is A. Viruses are also pathogenic, meaning they can cause disease.
Here's why the other options are not accurate:
B. Viruses are also decomposers: This is incorrect.
Bacteria can decompose organic matter, but viruses cannot.
They are not living organisms and lack the machinery to break down complex molecules.
C. Viruses are also prokaryotes: This is incorrect as well.
Bacteria are prokaryotic organisms, meaning they lack a nucleus and other membrane-bound organelles.
Viruses are not cells and have a much simpler structure.
D. Viruses can also cause food to spoil: While some viruses can contaminate food and cause spoilage, this is not their primary function.
Bacteria are much more common culprits in food spoilage due to their ability to reproduce rapidly and break down food components.
Therefore, the only shared characteristic highlighted in the diagram is the ability to cause disease.
It's important to remember that despite this similarity, viruses and bacteria are fundamentally different entities.
Bacteria are single-celled organisms, while viruses are much simpler and require a host to reproduce.
how do whales differ from fish
Hello There!
Information Provided In Image Below
Answer: whales use a blowhole to breath were fish use gills
Explanation:
why must gametophyte cells divide by mitosis
Answer:
Haploid spores grows by mitosis and develops into gametophytes. In plants, there’s a little break between meiosis and the production of sperm and eggs. During that break, a separate little haploid plant grows.
In plants, meiosis occurs to produce the gametophyte. The gametophyte is already haploid, so it produces sperm and egg by mitosis.
So in other words it is important.
Hope this helps and have a great day!!!
[tex]Sofia[/tex]
The gametophyte cells must divide by mitosis because it lead to the formation of gametes cells which are haploids.
What is mitosis?Mitosis is the type of cell division that involves that involves the production of two identical daughter cells after division.
The plant is made up of gametophyte, which is formed from the spore and give rise to the haploid gametes through mitotic cell division.
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Natural selection of favorable adaptations in organisms often results in A. the inheritance of acquired traits. B. the evolution of a species. C. the elimination of favorable traits. D. an increase in genetic mutations.
Answer:
B. The evolution of species.
Explanation:
Answer:
B
Explanation:
are predator-prey relationships density-dependent or density-independent limiting factors explain
Answer: Density dependent
Explanation: It is a density dependent because there has is a direct correlation between the ratio of predatory animals to prey animals for an ecosystem to function properly. Otherwise the ecosystem begins to die.
Predator-prey relationships act as density-dependent limiting factors in ecosystems, affecting population sizes based on the density of the populations involved. These biological interactions include predation and competition, which can increase mortality or decrease reproductive rates.
Explanation:Predator-prey relationships are typically considered density-dependent limiting factors in ecosystem dynamics. This means that the effects of these relationships on population sizes vary with the density of the population. For instance, as the prey population increases, it provides more food for predators, which can result in an increase in the predator population. However, as the predator population grows, it starts to reduce the prey population through increased predation. Conversely, when prey becomes less abundant, predator numbers may decline due to the scarcity of food.
Density-dependent factors such as predation, competition for food, disease, and waste accumulation are biotic factors that often lead to increased mortality or reduced reproduction rates within populations, thus regulating their sizes. These factors intensify as the population density increases, demonstrating a direct correlation between the impact of these factors and the number of individuals in a population.
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The base of an energy pyramid is always composed of _______________.
Autotrophs!!!!!!!!!!!!
In humans, having wet earwax is a dominant trait. Having dry earwax is recessive. The man has one recessive allele and one dominant allele and his phenotype is that the man would be dominant with wet earwax.
a) A woman has two dominant alleles. What is her phenotype?
B) if this man and woman have a child, is it possible for their child to have dry earwax? explain.
Her phenotype is to have wet earwax
No, the woman has 2 dominate traits and the man has 1 recessive, they need atleast 1 each
Answer: what type of question is this but the answer would be be because he still has one recessive trait if the woman has a dominant trait both dominant traits and he has one dominant trait and recessive trait they have a 75% chance of coming out with wet earwax and a 25% chance coming out with dry earwax because there's always that possibility because of that recessive trait it's rare but a possibility
Explanation:
What type of industry produces two-thirds of all sulfur dioxide that pollutes the air?
Answer:
Electric power plants
Which sentence describes an example of a positive feedback loop?
A: Warm blooded animals were when they get too hot. Sweating as a method by which the body close itself.
B: A thermostat regulates. Temperature by turning a furnace or air conditioner on and off.
C: When blood flows from a mild cut, blood clots form to prevent excessive bleeding.
D: As oceans get hotter, they release more CO2, which then increases atmospheric and ocean temperatures.
The example of a positive feedback loop from the provided options is D: As oceans get hotter, they release more CO2, which then increases atmospheric and ocean temperatures.
Explanation:The question relates to the concept of feedback loops in biological systems, particularly the difference between negative and positive feedback loops. The sentence that describes an example of a positive feedback loop is: As oceans get hotter, they release more CO2, which then increases atmospheric and ocean temperatures (option D). This example illustrates how a change in the system leads to an increase in the response, further promoting the initial stimulus, which is characteristic of a positive feedback loop. In contrast, negative feedback loops involve actions that counteract a change, aiming to maintain or reduce the response.
Fish respiratory systems exchange gas and receive oxygen at the gills. This oxygen then enters the blood stream and is pumped through the heart and back through the gills without first returning to the heart. This order of events best describes which type of circulation system?
a) double loop
b) single loop
c) open
d) recycling
please help me
This type of circulatory system is called the open circulatory system... :)
Answer: Single loop
Explanation:
The circulatory system of the fishes are considered as the single loop circulatory system because they have a single circulatory pattern.
Deoxygenated blood from the body reaches the heart which is then pushed towards the gills. The gaseous exchange takes place between the outer environment and gills and then oxygenated blood is circulated through out the body.
A straight line on a graph indicates that there is a ____ relationships between the dependent varible and the independent variable
Answer:
The answer is linear.
Explanation:
Hope my answer has helped you! :)
The answer is linear :)
Hope this helps
A boundary between nonsedimentary and sedimentary rocks is an example of which type of unconformity?
A. Nonconformity
B. Angular unconformity
C. Paraconformity
D. Disconformity
Answer:
A boundary between non-sedimentary and sedimentary rocks is an example of nonconformity.
Explanation:
Nonconformity happen when sedimentary rocks are deposited on igneous and metamorphic rocks.
This sedimentation forms a boundary between the surfaces of the two rocks.
This gap that is formed is what is referred to as an unconformity, the specific unconformity above is non-conformity.
Answer:
A. Nonconformity
Explanation:
The atomic bomb resulted from a nuclear _____.
Answer:
chain reaction
Explanation:
The atomic bomb resulted from a nuclear chain reaction. The atomic bomb is produced by a chain of nuclear fission reactions.
Nitrogenous bases are located on both strands of the DNA double helix. What is the significance of the nitrogenous bases?
Answer:
Nitrogenous bases bind nucleic acids together. Hope this helps!
Explanation:
Nitrogenous bases in DNA provide the genetic code and determine the sequence of amino acids in proteins.
Explanation:The significance of the nitrogenous bases in DNA is that they provide the genetic code and determine the sequence of amino acids in proteins. There are four nitrogenous bases in DNA: adenine (A), thymine (T), cytosine (C), and guanine (G). The order and combination of these bases along the DNA strand determine the genetic information and traits of an organism.
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