Explain what causes the moon to have phases

A scientist observes some cells under a compound microscope and needs to determine if they are bacteria or yeast. Aside from size, what chemical compounds (not organelles!) would positively identify the cell as either a bacterium or a yeast?

How might variations in the poison dart frogs' colors and markings affect the probability that an individual frog will survive in its environment? Construct an explanation in support of your answer.

Describe the role of neurotransmitters and how influences the next neuron at the synapse.

Why was a. africanus unlike any primate fossil skull that dart had ever seen?

The lower leg jolts when struck just below the kneecap. Our eyes blink shut when an object moves quickly towards our face. These are examples of A. reflex reactions. B. short-term memory. C. sensory overload. D. learned responses.

Sign of physical health and wellness

Which phrase best defines a biome? a. areas with distinct animal communities and associated with particular climates b. areas with distinct plant communities and associated with particular climates c.

If you study ecology what are you studying

Homologous structures are structures found in one species that have the same basic anatomical structure and embryonic origin as those found in another species.

Why do you think humans have two sets of 23 chrosomes