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pishuonlain [190]
3 years ago
6

Approximately how long do scientists think chemical evolution took?

Biology
1 answer:
Juliette [100K]3 years ago
7 0

Scientist believe it took less than a billion years.

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You see an entire pond, with the same plant across most of it. The plant seems to be surviving very well. Which adaptation does
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Answer: One advantage is, well, the water. There’s plenty of it and it’s all around. Therefore, most aquatic plants do not need adaptations for absorbing, transporting, and conserving water. They can save energy and matter by not growing extensive root systems, vascular tissues, or thick cuticles on leaves. Support is also less of a problem because of the buoyancy of water. As a result, adaptations such as strong woody stems and deep anchoring roots are not necessary for most aquatic plants.

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Decomposers are necessary in an ecosystem because they
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They return nutrients from waste or dead organisms back into the ecosystem to be recycled.
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3 years ago
I don’t get this can someone explain would be appreciated :)
olga nikolaevna [1]
When completing Punnett Squares, you cross the letters that meet up. For example, their are two TTs and two Tts. Dominant will always show before a recessive so if it's TT or Tt it will be the dominant version. two tt's mean that it's recessive. In a Punnett Square, one box = 25%.

Part A: The genotypic ratio is 50% TT and 50% Tt. The phenotypic ratio is 100% tall.

Part B: The two Tt's could produce a short plant because there is a 25% that the parents will both give t's.
3 0
3 years ago
Populations evolve for many reasons. Suppose there is a population of plants that have either purple flowers or white flowers, a
inna [77]

I will answer the question accordingly so that it help you under stand it better.

Question A.

During an extreme heat wave, plants with white flowers survive better.

What mechanism is in work here?

Answer: Mechanism of Natural Selection will work here. This is called survival of the fittest which means the best color which fits in harsh conditions will dominate over others and will survive for longer time.

What is the effect on the gene pool?

Answer: The Frequency of white allele will increases because white color is the best fit to extreme heat wave.

Question B.

A person uproots the five closest plants, which all happen to have white flowers.

What mechanism is in work here?

Answer: The mechanism of gene flow will work here as color of flower represents genotype of flower.

What is the effect on the gene pool?

Answer: The Frequency of white allele will increases because genotype of white flowers is increased.

3 0
3 years ago
Please help (only comment the answers cause I can't do this alone it's hard)
sukhopar [10]
1.8.99999999.0
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3 years ago
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