In early embryonic development the cells start to differentiate based on ...

a. hormones secreted by the uterus

b. amniotic fluid produced by the placenta

c. their location, or layer

d. chemicals secreted by the blastocyst

What type of pressure is associated with a cloud

What happens when the diaphragm contracts? a. the volume of the thoracic cavity increases. b. the diaphragm rises. c. the volume of the thoracic cavity decreases. d. the rib cage moves down.

What are the 3 basic characteristics of the cell theory

A hypothesis is best described as

All the water on earth, including the water in the atomosphere, makes up the

How many cell types are present in your groups set of organisms?

Which of the following is the functional unit of a myofibril? a. sarcomere b. myofilament c. sarcolemma d. endomysium

20. In certain species of summer squash, fruit color is determined by two interacting genes. A dominant allele, W, determines white color, and a recessive allele (w) allows the fruit to be colored.

When you look out the window, you can see constantly moving air. air is cycled in order to reach equilibrium. B) since these change the density of air and we know the air flows from the region of high density to the region of low density.

What effects do deforestation have on the animals?