If a leaf is unlobed, which of the following is true? It has no stem.

It has jagged edges.

It comes from a conifer.

It has no indentations or subdivisions.

Which statement best describes a keystone species? o a. it has littlelmenetic variation. it has an extremely high population. 0 b. 0 c. it remains unaffected by all environmental changes. od. it has a strong influence on the ecosystem. 0 e. it's the first species to populate a new ecosystem.

Why is it important to reduce the number of chromosomes in half when forming gametes for sexual reproduction?

Aboy jumps into a cold swimming pool and his body tempature goes down hus muscles ,blood vessels