Which kind of action is a cause of air pollution?

A. Poisons are released into a major river.

B. Gasoline is burned by a car engine.

C. Trash is dropped in a national wildlife preserve.

D. Tuna are fished to extinction.

Which enzyme removes rna primers and fills in gaps in small regions of dna where the rna primers were located?

DNA is approximately 2.5 nmnm in length. If an average man is 5 ft 10 in. in. tall, how many DNA molecules could be stacked to extend from the ground to the top of the head of an average man?

Over the course of evolutionary time, animal body sizes have gotten larger, yet cell sizes have not. Cells have stayed proportionally the same size to remain efficient, which is due to the fact that Group of answer choices larger cells would become

Which advantages does the skeleton of birds provide for flight? a. Light hollow bones b. Volume and heavy weight for lift c. Rigid structure to anchor strong muscles for flight d. Loosely unconnected bones

The great hornbill and the toucan both eat the same fruit, insects, and nuts. They both live in the rainforest. Their large bills function to get food and also as warning coloration.

The structure of eugenol is given below. select which functional group below is present in eugenol.

Modern Humans are classified as the species?

Which of the following is NOT a benefit provided by soil? 1. provides a habitat for animals 2. allows for water storage for plants 3. can be blown or washed away from its parent rock 4. provides minerals and nutrients for plants

What can cause changes in DNA sequences? A. mutations B. genetic drift C. gene flow D. proteins

What is the definition of chemical energy