Which of the following is an example of the first living organisms that dominated Earth's surface?

trilobites

prokaryotes

eukaryotes

heterotrophs

If a DNA molecule is compared to a spiral staircase, what parts make up the steps? sugar and nitrogen base pairs of nitrogen bases sugar and phosphate pairs of sugars

What are mutations? How do they occur?

Wich cell organelle provides instructions to the golgi apparatus

Phosphorus plays an important role within the structures of the body. Which of the following structures is phosphorus found in? a. bones b. cell membranes c. DNA d. all of the above

Why does darkness affect the light-independent reactions of photosynthesis? Plants stop their daytime activities and rest during the night much like animals do.

How does ATP form? Why is it so important to the cell?' (open answer)

If you were pooping and your poop is green what does that mean

In a population, when the birthrate becomes higher than the death rate, the population's growth rate A) decreases. B) increases. C) slows to a stop. Eliminate D) levels off and remains constant.

In spermatophytes, the plant embryo is encased in a seed. True False

Which statement best explains why the level of ATP in skeletal muscles changes during exercise? Adenosine and phosphate in ATP are destroyed by the muscles. Waste ATP accumulates in the blood stream rather than in the muscles.