How long ago did homo sapiens appear

Why is the mitochondria arranged around the filament near the tail of the sperm.

In plants, flowers have reproductive parts that enable it to make seeds. In humans, which parts carry out that function? a. pituitary gland and lymph nodes b. ovaries and testes c. fallopian tubes and colon d. pancreas and hypothalamus Is it B? : c

Rewrite the following sentence to make it true. Geologists subdivide periods into eras

Suppose you feel hungry, so you reach for plum you see in a fruit bowl. explain how both external and internal stimuli are involved in your action?

Explain how zooxanthellae have a symbiotic relationship with coral.

22. In an active state of a G protein, a. the alpha subunit binds to a target protein and the beta-gamma subunit remains bound to the receptor. b. the alpha and beta-gamma subunits both can bind to target proteins. c.

What is the diploid number for humans

In the nervous system reflex arcs are stereotypes, repeatable and unlearned. select one: a. True b. False

A bird is observed to nest along the coastline. It then spends hours out in the open ocean feeding on fish. What is this behavior called? This behavior of sea birds is termed.

A genotype is the collection of all the genes occurring in members of a species.