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kvv77 [185]
2 years ago
13

What kinds of evidence does the fossil record provide that allows scientists to draw conclusions about life on Earth millions of

years ago?
Biology
2 answers:
Karolina [17]2 years ago
5 0
The evidence it leaves is what type of environment it was then, how big were the animals, who ate what, and etc. it can draw conclusions of what animals were then and how animals have went through evolution. Scientists are able to make hypothesis and educated guesses on things.
WINSTONCH [101]2 years ago
3 0
They provide half lives by radio active decay that can tell how old they are and earth also they provide analogous and and homologous structures
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Which two statements describe advantages of genetic engineering? A. A genetically engineered crop that is resistant to insect pe
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Answer:

A. A genetically engineered crop that is resistant to insect pests could also harm helpful insects.

B. Crops can be genetically engineered to have useful traits that are not found in wild populations,

Explanation:

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2. Just as in humans, systems interact in plants to maintain homeostasis and accomplish the functions of transport, reproduction
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osmosis

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plants use osmosis whic is moving water though a semipermial membrane to draw up water.  It moves from places of high conetartions of water (dirt)  has to  is less water (roots). When it does this the plant mains homeostasis by getting water up useing their xylem (tubes in stems) to the leaves.

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A scientist observes changes in a population of slow-moving animals over time. She hypothesizes that the population may be decre
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<h2>Scientist Observing changes </h2>

If the population of the species is significantly decreasing then the species could become extinct. The decline in population is due to some factors like less immigration, aging, and decreasing fertility rates. But the most is due to less immigration which causes to decrease population. The extinction of population can be prevented by some serious actions which should be taken government.

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3 0
3 years ago
Jill is heterozygous for gene A and is going to have a child with Jack, who is homozygous recessive for gene A. Which of the fol
Igoryamba

Answer:

D. Aa

Explanation:

Given:

Jill (mother) is heterozygous for gene A --------- i.e Jill = Aa

Jack (father) who is homozygous recessive for gene A-------- i.e Jack = aa

Now if both cross and fertilization occurs, we have:

         A          a

a        Aa        aa

a        Aa        aa

The offsprings are (Aa, Aa, aa, aa)

Nondsijunction is the inability of homologous chromosomes to seperate properly during cell division. Now, we were told that this fertilization undergone nondisjunction in meiosis 1. Hence, both homologous chromosome move into the same daughter cells instead of different daughter cells because separation of homologous chromosome does not occur properly.

Therefore the result of these fertilization of a normal haploid sperm with an egg that had undergone nondisjunction in meiosis yields offspring with genotype Aa of their Mother (Jill).

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3 years ago
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