Bioquiz3

In humans, oogenesis is complete

after the nuclei of the sperm and egg fuse

From earliest to latest, the overall sequence of early development proceeds in which of the following sequences?

cleavage --> gastrulation --> organogenesis

If gastrulation was blocked by an environmental toxin, then

embryonic germ layers would not form

Diploidy is first reestablished following

fertilization

An advantage of internal fertilization over external fertilization is that:

internal fertilization prevents the drying out of gametes in a dry environment

The embryonic precursor to the human spinal cord is the

neural tube

In humans, the ___ of the sperm enters the oocyte

nucleus

Spermatogensis and oogenesis differ in that

oogenesis produces one egg and spermatogenesis produces four sperm