How much oxygen is contained in the atmosphere?a. 20%
b. 21%
c. 22%
d. 23%

What is slowed when water is a limiting factor in an environment?
a. amount of evaporation
b. population growth
c. the types of rocks

Answers

Answer 1

Answer: Oxygen makes up 20% of the atmosphere while nitrogen makes up 78%. The other two percent is made up of other gases. Population growth would slow. Organisms need water to survive and if there is a limited amount of water, populations will decline.

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Fill in the blank below with the vocabulary word that best completes the sentence. ___is the science of naming and classifying organisms based on structural comparisons and genetic evidence

Answers

TAXONOMY is the science of naming and classifying organisms based on structural comparisons and genetic evidence.

Taxonomy is the field of study aimed at naming, describing and classifying all forms of life.

Characters used for descriptive purposes are called taxonomic characters. A character can be defined as any phenotypic trait of an organism, which can be measured and/or weighed.

Molecular taxonomy uses the genetic information contained in the DNA molecule to establish relationships between species.

In conclusion, TAXONOMY is the field of study used to name and classify organisms based on structural comparisons and genetic evidence.

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taxonomy-is the science of naming and classifying organisms based on structural comparisons and genetic evidence.

Echinoderms, like sea stars, have a nervous system. A) Ring- like B) ladder- like C) Nerve net

Answers

The correct answer to the question which is stated above is letter c. Nerve net.

Echinoderms, like sea stars, have a Nerve Net nervous system.

>>Nerve nets are found in members of the Cnidaria, Ctenophora, and Echinodermata phyla, which are found in marine environments.

The large rounded brain near the center of the cell is the

Answers

The large rounded brain near the center of the cell is the nucleus. It is known as the brain because it is responsible for most of the cell functions. Similarly to the human brain, the nucleus sends information and instructions to the cell.

Which of the following statements is true about solar eclipses? There is a solar eclipse every month. All solar eclipses are total. Some solar eclipses are not total. There can be twelve solar eclipses in a single year.