The seed plants became dominant during the late ___ when the climate became ___
a. Cambrian; wetter
b. Carboniferous; drier
c. Carboniferous; wetter
d. Cretaceous; drier
e. Cretaceous; wetter
ANSWER: b
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Marceau is studying small single-celled organisms that contain phospholipid membranes. These organisms can be broadly classified into the domain:
A. Bacteria B. Animalia C. Fungi D. Protista
Which of the following reactions is classified as a heterofermentation?
A) hexose 2 lactate + 2 H+ B) HCOOH H2 + CO2 C) glucose lactate + ethanol + CO2 + H+ D) fructose 3 acetate + 3 H+
The synthesis and secretion of ____ is ultimately regulated by gonadotropin-releasing hormone from the ____
a. estrogen; posterior pituitary b. estrogen; ovaries
c. testosterone; hypothalamus d. testosterone; testes e. androgens; gonads
Flowering plants
a. only reproduce asexually. b. produce clones through sexual reproduction, and under certain circumstances seeds through asexual reproduction. c. reproduce asexually about half the time and sexually about half the time. d. only reproduce sexually. e. produce seeds through sexual reproduction, and under certain circumstances clones through asexual reproduction.