A significant event influencing the rapid
evolution of plants on land after their initial
appearance was the
a. increase of atmospheric oxygen.
b. reduction of ultraviolet radiation
penetration through the atmosphere.
c. stabilization of global climates.
d. increase in soil nutrients.
e. merging of land masses
B
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Ventilation includes which of the following
A) transport of gases from tissues to lungs B) transport of gases from lungs to tissues C) inspiration D) expiration
A chromosome region may be deleted by all of the following means EXCEPT ____
a. bacteria b. virus c. chemical d. irradiation e. environmental factor
Growth that results in an increase in stem or root length occurs in which specific area of the plant?
a. lateral meristem b. apical meristem c. vascular cambium d. cork cambium e. periderm
Which would be a fact supporting the hypothesis that echinoderms such as sea stars evolved into radial symmetry from bilateral symmetry?
A) They swim like animals with bilateral symmetry. B) They use their appendages in a bilateral manner. C) Their larvae have bilateral symmetry. D) Their brains show the mirror image development of bilateral symmetry.