The process by which species cease to exist
A. All of the answer choices are correct.
B. is endangerment.
C. is speciation.
D. is extinction.
E. has never occurred.
D. is extinction.
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Genes from different sources that are related in sequence due to shared evolutionary ancestry are called ________ genes, and groups of such genes are known as ________
A) homologous / gene families B) paralogous / functional genes C) orthologous / gene families D) homologous / functional genes
How many centimeters long is a human fetus at the end of the first trimester?
1.3 cm 2.5 cm 3.10 cm 4.15 cm
Populations
a. are only limited by one factor at a time. b. increase arithmetically. c. may increase indefinitely. d. are limited by the carrying capacity. e. overcome limiting factors by increasing their biotic potential.
The types of bonds linking nucleotides in nucleic acids are
A. nonpolar covalent bonds. B. phosphodiester bonds. C. peptide bonds. D. ionic bonds.