Which of the following is true about renewable resources?

a. they can be replaced by a healthy environment.

b. there are plenty for people to use, but only for a very short time.

c. using them will hurt the environment.

d. they cannot be replaced after they are used up.

Option A

Explanation:

Renewable resources can be replenished again and again with the right type of environment provided. For example hydroelectricity is generated again and again.

organisms that lack symmetry are called asymmetrical and belong to phylum porifera/sponges.

organisms with specialized stinging cells belong to phylum cnidaria. stinging cells are called cnidoblast cells.

cnidarians show two morphological forms : polyp (sessile) and medusa (mobile)

filter feeding is observed in porifera members.  

alternation of generation is observed in coelenterata or cnidaria. there is alternation of asexual polyp form and sexual medusoid form. it is also referred as metagenesis.

[ answer ]

foliated

[ explanation ]

foliation forms in a rock when pressure squeezes the rock together. the rock then has a design of many different color little lines. there are three types of foliated rock. the types are slate, schist, and gneiss. each type of foliated rock is different based on grain size and foliation characteristics. the lines appear when the rock has been under pressure.

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