Platelets play a key role in _________, but if they are not used they are broken down after about ________ days.

What is DDT? What are the main problems with DDT? How did it get to brown pelicans and how did it affect their survival?  Which famous biologist called attention to this problem? Your answer must be in full sentences and paragraph format.  Outlines are not allowed. Spelling counts.  Be specific.  You need to describe these concepts in detail.

Most colony-stimulating factors are growth factors.

The abundance of viruses in the oceans is important because they can control the numbers and species composition of bacteria.

The growth factor that increases the formation of erythrocytes, all classes of granulocytes, monocytes, and platelets from myeloid stem cells is

Which of the following is not an example of areas that tend to be heavily fished?

M-CSF is a growth factor that stimulates the production of monocytes from myeloblast cells.

In young children, hemopoiesis occurs in most of their bones, but in adulthood it primarily occurs in

Which are characteristic of leukocytes? a: Smaller than erythrocytesb: Have a nucleusc: Have no hemoglobind: More numerous than erythrocytese: Depending on type, may or may not contain granules

Plasma makes up about ______ percent of a centrifuged sample of whole blood.