Which statements about the circulatory system of a mollusk are true?

select all that apply.

a
gas exchanges takes place by diffusion.

b
it is an open system.

c
it is a closed system.

d
blood moves through the sinuses into the gills for gas exchange

Study the picture of the ocean. which is the best example of an organism’s niche shown in the picture? a. the environment contains several of the same species of coral. b. the shallow area of the ocean meets the needs of the coral and the fish. c. the ocean has fish and coral that live in the same area. d. the coral take in food from the water and provide shelter for the fish.

In a vegetable garden 45 bean plants have been eaten by deer 5 are untouched what is the frequency of bean plants in the garden that have been eaten?

What is the most important inorganic material for livings things? ! due tomorrow!