In 1884, Elie Metchnikoff observed blood cells collected around a splinter inserted in a sea star embryo. This was the discovery of
a. blood cells.
b. sea stars.
c. phagocytosis.
d. immunity.
e. none of the above
Ans: c. phagocytosis.
Biology & Microbiology
You might also like to view...
The most accurate description of an organism with
genotype AaBb is a. homozygous dominant. b. heterozygous. c. heterozygous dominant. d. homozygous recessive. e. heterozygous recessive.
Biology & Microbiology
What are cells that break down the matrix by secreting acids and enzymes and play a role in bone remodeling and repair?
A. Osteocytes B. Yellow marrow C. Osteoclasts D. Osteocytes E. Red marrow
Biology & Microbiology
Which of the following is a protozoan with two nuclei and no mitochondria?
A) Plasmodium B) Paramecium C) Euglena D) Giardia E) Trichomonas
Biology & Microbiology
Which of the following is produced in largest numbers by the TCA cycle?
A. NADH B. FADH C. ATP (GTP) D. CO2
Biology & Microbiology