Which types of molecules can move through the phospholipids?

a

Small, non-polar molecules

b

Large molecules

c

whole cells

d

protein

How does an area qualify as a biodiversity hotspot?

A farmer sprays insecticide on his crops to kill unwanted insects. Most of the insects die, and the chemicals have the effect of damaging the DNA of the insects that are not killed. Which of these has happened? A.

Explain how some hail can become baseball sized

In which of the following situations is a plant reproducing sexually? A. A potato plant produces a tuber, and the next year, a new plant grows from the tuber. B. The pollen from one flower is transported by an insect to the ovule of another flower.

New fuels are being produced by converting corn and grasses into compounds containing alcohols that can be broken down for energy in various engines. The purpose of this research is to A.) reduce the use of finite resources B.

Which statement is true of the nucleus of a cell

The extent to which traits, abilities, or IQ scores may increase or decrease as a result of environmental factors is called:

A cell that can capture energy from sunlight or chemicals and use it to produce its own food from inorganic compounds.

To test the responsiveness of the kidneys, scientists have designed an experiment tracking urine output of people during a normal day, while regulating the in-take of water by mouth. What would be an appropriate hypothesis for this experiment?

What is the name for the preserved evidence of once-living things?