How does food move along alimentary canal? * A. By peristalsis
B. By assimilation
C. By absorption

Spore is reproductive cell can’t develop into new individual. *

a) True
b) False

Vascular plant have special cell to transport food and water. *

a) True
b) False

Mosses, liverworts and hornworts are all vascular plants.

a) True
b) False

No links please

1)a

2)true

3)false

4)true

Explanation:

answer: - few nutrients

high pressure

low temperatures

explanation: 1. few nutrients:   open-ocean zone is located way far from the land, which is the main source of the essential nutrients.2. high pressure: pressure increases by 1 atmosphere for every 10 meters increase in depth.3. ample sunlight: a large fraction of the sunlight is reflected back to the atmosphere from the sea surface. 4. varying salinity: below the thermocline, the water is isolated from the atmosphere so the salinity remains stable over the year.5. low temperatures:   the temperature of open-ocean zone ranges from a low of -2°c to an average of 17°c

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.