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Biology

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I believe that I have answered the following questions correctly, but would like some reassurance.

organisms that are used to decontaminate soils may
a. store contaminates in their tissues
b. release pollutants into the air
c. degrade the pollutants
d. be plants or microorganisms
**e. all the above**

polysaccharides are used by plants for
a. food storage
b. food storage and structural support
c. cementing cells together
d. structural support
**e. food storage, structural support, and cementing cells together**

Chemicals produced by one group of cells that affect other target cells are called
a. secretions
b. plymers
c. steroids
**d. signaling molecules**
e. enzymes

The endosperm of a plant
a. produces sperm cells
b. protects the young embryo within a seed
**c. is the food supply for the new sporophyte plant**
d. provides a connection between the ovary of a flower and a developing seed
e. composed of haploid tissue

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