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Pavlova-9 [17]
3 years ago
12

PLEASE HELP

Biology
1 answer:
ArbitrLikvidat [17]3 years ago
5 0

Answer:

1. A massive star depletes its nuclear fuel; gravity overpowers the star; supernova occurs; core of star collapses

2. black hole; gravitational pull

3. The center of the Milky Way

Explanation:

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Answer:

the chicks and mouse would be losely conected because they have more of the same gentic material and fish and humans would havwe the same since they kind act like the same because The recent advances in developmental biology described  have established the central importance of a small number of highly conserved signal transduction pathways that mediate cell interactions crucial for animal physiology, reproduction, and development. It seems likely that many developmental toxicants might affect development by acting on those pathways. Application of the methods that have been so successful in elucidating them should now allow scientists to investigate that possibility and to determine the mechanisms by which developmental toxicants act. This chapter reviews the experimental approaches primarily responsible for the recent advances in knowledge about animal development and discusses how those approaches might be applied to developmental toxicology. Chapter 8 discusses how those approaches might lead to improved qualitative and quantitative risk assessment.

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2 years ago
How do fish obtain oxygen?
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<span>d- They take in oxygen gas dissolved in the water through their gills. </span>
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2 years ago
Evolution of a species could occur as a result of changes in the
victus00 [196]

Options for the question have not been provided. They are as follows:

(1) DNA in muscle cells

(2) base sequences in liver cells

(3) genes in an egg cell

(4) number of chromosomes in a fetal bone cell

Answer:

(3) genes in an egg cell

Explanation:

Evolution is the change in characteristics of a species which it develops over the time. These changes can be a result of natural selection, genetic drift, founder effect etc. They are passed from one generation to another hence the alleles for them get fixed in the population.

For evolution to occur, change should take place in germ cells. Germ cells are the one which fuse to form the organisms of next generation. If there is a change in their genes, it would also appear in next generation, unlike changes in genes of somatic cells. Since egg cell is a germ cell it is the correct answer.

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3 years ago
7. What is the purpose of the replicases?
masya89 [10]

Answer:

Replicates can be used to measure variation in the experiment so that statistical tests can be applied to evaluate differences. Averaging across replicates increases the precision of gene expression measurements and allows smaller changes to be detected.

Explanation:

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3 years ago
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