The oldest ancestors of plants are: a. green algae c. mosses b. ferns d. seed plants

Earths energy sources include both renewable and nonrenewable resources. name at least three sources of energy that could be used in your house. then describe the ideal energy source for generating most of your homes electricity, and explain why you chose that source. can someone give me some ideas, i’m kinda confused.

What is the next step in muscle contraction after the actin changes shape

What is the ratio of carbon hydrogen and oxygen in a carbohydrate?