Which of the following is an example of a role programmed cell death plays in maintaining homeostasis? 1) preventing crossover during meiosis 2) preventing self-fertilization in plants 3) promoting conjugation of DNA in bacteria 4) promoting tissue growth in body cells
In a pea plant, yellow seeds are dominant and green seeds are recessive. a pea plant that is homozygous dominant for seed color is crossed with a pea plant that is heterozygous. what percentage of the offspring from this cross would be heterozygous?
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The percentage that the offspring will be heterozygous is 50%.
Energy must be transformed in ecosystems because
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Energy must be transformed in ecosystems so that it is made available to other organisms.
Energy cannot be destroyed or created and an organisms energy must go somewhere and come from somewhere.
The element nitrogen has the atomic number 7 and an atomic mass of 14. How many neutrons does an atom of nitrogen contain? 14 7 0
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A nitrogen atom contains 7 neutrons. You can work out the number of neutrons of an element by subtracting the atomic mass from the atomic number.
In what stage of mitosis does the nuclear envelope disappear?
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The correct answer should be Prophase mah d00d
A monkey has 42 chromosomes in almost all its cells. How many chromosomes are in a monkeys haploid cells?84 42 23 21
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if 42 is a diploid cell, then a haploid would have 21
If the monkeys chromosomes are haploid cells it would be 21 because haploid also means "half".
Cycles are essential to all living organisms. a. True b. False
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true
The biogeochemical cycles move through mainly the biotic and abiotic components of the earth, more elaborately the spheres -biospheres, lithosphere, hydrosphere and atmosphere regions of the ecosystem. These biogeochemical cycles, from its terminology and discernable word morphology- involves the biological, geological and chemical components that make out to complete an exact and purposed cycle. The purpose in these cycles are to maintain balance and to ensure the ongoing process of the living and non-living organisms in the environment. These cycles’ help to living organisms survive and thrive. One popular example is the water cycle.