biology exam

1-permeable means

• things can pass

• it is permanent

• the concentration levels are different

• things are stuck

2-osmosis is the movement of...........across a membrane

• food

• energy

• oxygen

• water

3.the main part that cause straightness of mint plant after watering is the presence of

• sap vacuoles

• nuclei

• cell wall

• mitochondria

4-which of the following solutions is low concentration in its solutes

• hypertonic

• isotonic

• hypotonic

• no correct answer

5-reverse osmosis is also known as

• hyperfiltration

• hyper osmosis

• double osmosis

• no correct answer

6-passage of water through selective permeable membrane known as

• imbibition

• active transport

• facilitated diffusion

• osmosis

7-which transport require energy

• active

• passive

8-which of the following substances pass through plasma membrane by osmosis?

• glucose

• sodium

• protein

• water

9-spartina,acord grass,grow in salty marshes and store salt in its roots.this make salt concentration in soil greater than that of surrounding water.

what most likely occurs in response to this concentration in the roots?

• salt move into roots

• water moves into roots

• nutrients move out of the roots

• water move of the leaves and into the air

10-which of the following does not have a cell wall?

• animal cell

• bacterial cell

• plant cell

• fungi