In the United States, the cool polar air masses and the warm tropical air masses come together to form a

A. blizzard.

. B. tornado.

C. hurricane.

D. thunderstorm.

Is atmospheric nitrogen easily used by plants

Over the course of meiosis, how many times does one cell divide into two? (careful! think it through ...)

Why is it important to decompose hydrogen peroxide produced in cells.

Proteins that regulate chemical reactions in the body but remain unchanged by the reaction are known as -

How does the Sun influence the tides that we experience on Earth? The Sun is much too far away to any significant tides on our planet The Sun's tides depend on what season we are in, and are very different in winter than in summer The Sun has a much

Which is an example of the bottleneck effect? A) Green beetles move to a new location and build a new colony there. B) Green beetles survive as birds don't see them, whereas brown beetles get detected.

Why the average yearly temperature at the north pole is - 18c while the average yearly temperature at the equator is 27c?

The separation of a group of individuals from the rest of the population is referred to as

The following are features of mitosis or meiosis. can you put them in groups. im so confused : allows for transmission of chromosomes to offspring, necessary for growth and regeneration, allows for regeneration of an organism, two identical diploid

What is the MAIN cause of increased erosion, especially for soil? A) strong winds B) flash floods C) human activity D) movement of glaciers