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Liono4ka [1.6K]
3 years ago
8

The ......... theory states that the basic level of life is that of the individual cell

Biology
2 answers:
Llana [10]3 years ago
4 0
The unified cell theory.
nika2105 [10]3 years ago
4 0
The missing word is “ Unified “
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You analyze a dna sample which gives an a260 of 1.74 and a280 of 0.64. What is the concentration of this dna sample? Is it suffi
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The ratio of \frac{A_{260}}{A_{280}}  indicates the purity of nucleic acid.For pure DNA it should lie between 1.8-2.0.Whereas for RNA it should be greater than 2.

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A human eats a deer. which of these terms applies to the relationship between the human and the deer? a human eats a deer. which
Fantom [35]
1. A human eats a deer. Which of these terms applies to the relationship between the human and the deer?<span>
Answer: predation


2.</span>Humans and sharks both eat fish. Which of these terms applies to the relationship between the human and the shark?

Answer: Competition



3.Humans who have pets tend to be healthier than humans who do not have pets. Which of these terms applies to the relationship between a human and a pet?
Answer: mutualism



4.What is implied by the reference, "biotic portion of an ecosystem"?
Answer: the "living" portion of the ecosystem


5.What term applies to the relationship between a dog and a blood-sucking tick?Answer: parasitism

6.An egret eats insects stirred up by grazing animals. Which of these terms applies to the relationship between the egret and the grazing animal?Answer: commensalism
7. The concept that two species cannot occupy the same ecological niche simultaneously and continuously is called:Answer: the competitive exclusion principle
8. What is a serious problem that will result from predicted rises in global temperature?Answer: Species will be lost because rises in global temperature will exceed the rate at which natural selection can allow most organisms to adapt.
9. Why do most mutations occur?Answer: Random errors in DNA replication cause mutation.
10. What is the best definition of speciation?Answer: the process by which new species form
11. What is speciation resulting from two populations becoming isolated from one another?Answer: allopatric speciation
12.A scientific name is composed of two parts. What are they?Answers: genus and species
13. What is the smallest group that can evolve?Answer: population
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15. How do founder effect, genetic drift, and a bottleneck relate to each other?Answer: Founder effect and bottleneck are types of genetic drift.
16. In the common phrase, "survival of the fittest," what determines how fit an individual is?Answer: reproductive success
17. Which postulate of natural selection is best supported by the work of Gregor Mendel?Answer: Traits are passed from parent to offspring.

18. What can you conclude by looking at the following sequences from the cytochrome c gene of humans, mice, and an unknown organism? Human - ATGGTCTCTTT Mouse - ACGGTCTGTTC Unknown - ACGGTGTGTTCAnswer: The unknown organism is more closely related to mice than to humans.

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20. When predatory snakes eat songbirds with the loudest songs, they are acting as agents of what?Answer: natural selection



8 0
3 years ago
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