Which of the following is NOT associated with desertification?
A. eutrophication
B. the loss of biologically productive land to desert
C. deforestation
D. overgrazing
E. over-exploitation of soil resources
Ans: A. eutrophication
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Which morphological feature in lizards, mammals, and birds provides evidence of their descent from a shared
ancestor?
a. ribcages positioned right behind heads in the embryonic stage b. absence of limb buds in embryonic development c. presence of limb buds in embryonic development d. differences in limb structures in adults e. vestigial hindlimbs near the base of the tail in adults
Experimentally heating amino acids and exposing them to water resulted in ________
a. living cells b. protocells that could capture energy, concentrate materials, and replicate themselves c. denatured proteins d. proteins identical in sequence to some found in modern animals
Balanced polymorphism is a type of
a. disruptive selection. b. sexual selection. c. directional selection. d. reproductive isolation. e. stabilizing selection.
One result of natural selection is that populations become better suited to their particular environment by a process called ________
Fill in the blank(s) with correct word