Which of the following lines of evidence suggest that mitochondria evolved from the endosymbiosis of a pre-eukaryotic cell with a prokaryote
A. they conation circular molecules of DNA
B. they contain 70S ribosomes
C. they divide independently from the cell
D. all of these suggest
Ans: B. they contain 70S ribosomes
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The Hardy–Weinberg principle specifies the conditions under which a population of diploid organisms achieves ____
a. progressive evolution b. allopatric speciation c. adaptive radiation d. punctuated equilibrium e. genetic equilibrium
The Red Queen hypothesis may explain
a. why asexual reproduction is easier and faster than sexual reproduction. b. why aphids seasonally alternate parthenogenesis with sexual reproduction. c. the existence of all-female species of animals. d. the connection between species interactions and sexual reproduction. e. why meiosis and fertilization alternate during sexual reproduction.
The homeostatic interaction between the endocrine system and which other system is demonstrated by
insulin and growth hormone supporting delivery of nutrients to all cells? a. circulatory system b. lymphatic system c. digestive system d. skeletal system e. muscular system
Which statement is NOT true about red blood cells?
A. There are about 6 million red blood cells per cubic millimeter of whole blood. B. They are biconcave disks that lack nuclei when mature. C. Their normal life span is about 120 days. D. They are mainly produced in the liver. E. Hemoglobin is a protein that binds oxygen loosely to transport it.