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artcher [175]
3 years ago
8

Which of the following accurately reflects the beliefs on Earth's early history?

Biology
2 answers:
zhenek [66]3 years ago
6 0
The correct answer is D.
From the scientific research conducted so far, we know that in the early Earth's history the atmosphere lacked oxygen and was mostly filled with other gases like methane. The increase in oxygen levels happened when the plants started producing oxygen as a byproduct of the process of photosynthesis.
The research so far also shows that the RNA was present before the DNA and that the microspheres might have been essential to the development of life on Earth.

leva [86]3 years ago
6 0
Correct answer is D.
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The Internal skeleton of the porcupine gives shape and structure to the porcupine.

The stem of the rose plant provides support to the plant and serves to transport nutrient and water in the plant.

<h3>What a skeleton?</h3>

A skeleton is a rigid structure found in living organisms which provide structure and shape to the living organism.

Skeletons are found in animals.

Skeletons present in animals are of two types:

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The Internal skeleton of the porcupine gives shape and structure to the porcupine. It also serves as a point of attachment to muscles in order to enable movement.

Stems are present in plants.

Stems serve various purposes in plants such as:

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Thus, the stem of the rose plant provides support to the plant and serves to transport nutrient and water in the plant.

In conclusion, the internal skeleton of animals and the stem of plants both provide shape and structure to the respective organisms.

Leran more about internal skeleton and plant stem at: brainly.com/question/840794

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2 years ago
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Genotype<br><br> A: The physical characteristics <br> B: The set of alleles
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Answer:

The answer is B. the set of alleles.

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The virus that causes mumps in humans is composed of a protein outer shell containing a core of DNA. The virus that causes the f
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I believe the correct answer to the question is D. This answer choice makes the most sense given the context. Also, since RNA is less stable than DNA, it mutates more often.

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b. making an observation and asking a question

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After making different observations, and some research of other areas similar to the one that is study, she is asking what is the relation among the animals and the trees.

The next step will be to formulate a hypothesis using all the data and the two variables that she observed.

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Breeding livestock is graded "superior," "average," and "inferior" on the same traits as slaughter animals. In a 50-word paragra
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Livestock producers and  breeders rank livestock on their ability  to produce high quality, efficient breeding  animals and market-worthy <u>offspring</u>.

To be able to effectively evaluate breeding  and market animals is of vital economic importance for the animal markets. The same traits  used to evaluate <u>high-grade slaughter  animals</u> are also important in the <u>grading </u>of  <u>breeding stock</u>.

When we judge livestock we  classify them as:

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We are looking for  the most desirable traits to fit our  particular market and genetic needs. The "Livestock Judging Manual" indicates that some of the most prevalent traits necessary to score a better rating are:

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