Amino Group, Carboxyl Group, and the R group
Because gravity pulls towards the center of the earth evenly in all directions, giving earth a spherical shape.
Answer:
Option D, has only a single opening
Explanation:
A gastrovascular cavity has only one opening. The food goes in and comes out of the same opening there by making it a two way digestive tract.
However, a digestive tube is a one way digestive tract where the food goes in from mouth (one end) and comes out of anus (second end) . It is also called as alimentary canal
Hence, option D is correct
A, c, and d are the answers
It’s not b because trees release oxygen and absorb carbon dioxide
