The heart begins to beat.
Choose the letter of the best match:
A. third trimester of pregnancy
B. second month of pregnancy
C. first month of pregnancy
D. second trimester of pregnancy
E. third month of pregnancy
B. second month of pregnancy
You might also like to view...
Knowing the concentration of microorganisms in a sample is often an important consideration for environmental, industrial, and medical microbiologists, yet a microscope is sometimes not used to accomplish this task
Explain five major limitations to using a light microscope to directly count microorganisms. What will be an ideal response?
The function of the vascular cambium (a type of meristem) is to:
A. produce new growth at the tip of stems B. produce secondary xylem and phloem C. produce only xylem to make wood D. produce only bark E. produce new leaves
Platelets in mammals are functionally the same as ____ in other vertebrates
a. neutrophils b. eosinophils c. thrombocytes d. monocytes e. lymphocytes
These small short-lived organisms have a reproductive strategy to produce many offspring that have fluctuating populations.
A. r-strategists B. k-strategists C. l-strategists D. s-strategists