At what point in development do the organs begin to form?

a. immediately after fertilization
b. during cleavage
c. immediately after cleavage
d. during gastrulation
e. after gastrulation


ANSWER: e

Biology & Microbiology

You might also like to view...

Movement of phloem sap from a source to a sink _____

A) occurs through the apoplast of sieve-tube elements B) depends upon active transport of sugars into the sieve-tube elements C) depends on tension, or negative pressure potential D) depends on active transport of water into sieve- tube elements at the source E) results mainly from diffusion of sugars into companion cells

Biology & Microbiology

In transduction, the DNA is being moved between the two cells by

A) a third bacterial cell. B) a phage. C) transposons. D) membrane bound transport proteins.

Biology & Microbiology

Four of the five gases listed below were components

of the first primitive atmosphere simulation experiment. Select the exception. a. CH4 b. CO2 c. H2 d. H20 e. NH3

Biology & Microbiology

Why do cells pump things like protons against their electrochemical gradients?

What will be an ideal response?

Biology & Microbiology