What is a polar vortex? *

A) The atmospheric effect of everyone in a region opening their freezers at once

B) A constant ice storm that only affects certain regions

C) Low-pressure zones at each pole of the earth

Do the six kingdoms each have a purpose in the real world today like it did back then.

Why are lipids important in our diet?

Which microscope do you use to see parts of a cell?

Four students are asked to list characteristics of RNA in a table as part of an assignment. Which student listed the characteristics correctly?

Fluorescent dyes can be added to groundwater in order to trace the path of water. Scientists traced dyed water from a river directly to the ocean. How did the dyed water get to the ocean A. By flowing into an open watershed B.

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.

How many braincells do I have?

Which of the following is not being undertaken to reduce the risks to human health from pesticides?