White blood cells that patrol interstitial fluid, phagocytize almost everything except uninjured body cells, and secrete
cytokines to alert the adaptive immune system to threats are known as ____.
a. neutrophils
b. macrophages
c. T lymphocytes
d. dendritic cells
e. eosinophils
ANSWER: b
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Organisms that form lactate, ethanol, and CO2 as end products of glucose metabolism are called ________ fermenters.
Fill in the blank(s) with the appropriate word(s).
Individuals from different subspecies usually interbreed where their geographic distributions meet
a. True b. False
At the end of gastrulation, what is produced?
a. a blastocyst b. germ layers c. solid balls of cells d. a neural tube e. apoptosis
Phenotype refers to
A. the number of gametes in an individual. B. an individual's genes. C. the combination of alleles in an individual. D. the observable expression of the genes in an individual. E. the number of chromosomes in an individual.