The main structural component of plant cell walls is

How are the inner planets similar? * A. The inner planets are made of rock and metallic materials. They all have a liquid outer surface. B. Inner planets are made of gases such as hydrogen and helium. C.

Which term refers to the orientation of a spacecraft relative to a line of reference or its own direction? angle attitude alignment altitude

What can you conclude about Gregor Mendel from the information presented in the movie? A. Religious authorities forced him to stop his experiments. B. He was one of the first researchers to establish how heredity worked. C.

Neon is a non-reactive gas. Why is that? A. Because neon shares its electrons with other elements so no reaction is needed B. Because neon gives up its outer electrons thus making it stable and non-recative C.

What is the most common cause of speciation

Which statements are true of heterogeneous mixtures? 1) they settle out. 2) the proportions of solute to solvent may vary. 3) the solute is evenly distributed throughout. 4) they are composed of two solvents and two solutes. a. 1 and 2 b. 2 and 4 c.

Why do plants not need heterotrophs

During development, individual cells of the same organism begin to produce different proteins because A) not all cells can synthesize proteins. B) specific genes are activated in the cells. C) the cells have different numbers of chromosomes.

Most scientists believe earth's early archean atmosphere was formed primarily by gases released from:

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