All cells are surrounded by a membrane. Which is a characteristic of a cell membrane?

Question 5 options:

It is square.

It is semipermeable.

It is weak.

It is rigid.

Sugar loaded into the source end of the phloem draws water into the sieve tubes by osmosis, raising the pressure. What happens to the water at the sink end?

What is an important trait or skill for a scientist to have? choices: a) Manipulating results to fit a hypothesis b) Using personal bias c) Avoidance of bias d) Using personal prejudice I assume it's C but want to be sure.

Geologists obtain indirect evidence about Earth's interior by a. measuring pressure differences at Earth's surface. b. estimating temperature inside earth. c. directly looking under the many layers. d. recording and studying seismic waves.

During a growth spurt, which is (are) likely to grow first?

Is the process by which two groups of organisms speciate in response to each other and at the same time?

What place are sloths found?

In a solution of salt and water, which component is the solute? a. salt b. water c. beaker d. oxygen c

What are the two types of warm air masses that influence the weather in north america name and explain how they typically affect the weather

Which word describes an artificial pond with raised edges used for agriculture A) shaduf B) paddy C) aqueduct D) Chinampa

Why is dark matter difficult to measure? A) Because it does not exist in our galaxy. B) Because it disappears when it encounters ordinary matter. C) Because it creates so much heat it melts any instruments invented so far.