Put the following stages of development in order ...

a. Blastocyst implants in uterus,

b. zygote forms,

c. heart begins beating,

d. lungs can breathe air,

e. sex organs become visible

Which factors will determine which ram is able to knock the other back? A. the mass of the ram and the distance it runs B. the mass of the ram and the speed it runs C. the height of the ram and the direction it runs D.

This hormone is responsible for preparing the human uterus for pregnancy and as well as the mammary glands for lactation. What is this hormone?

The fact that the dna of humans and that of monkey species are 99% similar suggests that they probably share

Explain how crossing over, the distribution of random mixes of homologous chromosomes into gametes, and fertilization all contribute to variation in the traits of offspring

What is the name of the selectively permeable outer boundary of the cell, made of lipids and protein. It controls what goes in and out of a cell?

Which is not a characteristic of amniotic sac

What does the nucleus of a human lymphocyte contain? A. Only the genes to produce a specific antigen B. Only the genes to produce a range of antibodies C. Only the genes that control the growth and development of a lymphocyte D.

What is the functions for chloroplast

How do inbreeding and hybridization compare

A species of gray wolf was eliminated from a national park because of unrestricted hunting. As a result, there was a tremendous increase in the population of its prey, the elk. The populations of other herbivores also increased.