Which of the following insect hormones acts on the body tissues to stimulate molting and metamorphosis?
A. ecdysone
B. PTTH
C. juvenile hormone
D. brain peptide
E. All of the answer options are correct.
A
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Through which structure do oocytes travel as they leave the location where they developed?
A. uterus B. cervix D. ovary E. fallopian tube or oviduct
What is the advantage to having various types of chlorophylls and accessory pigments for the photosynthetic process?
A) It allows for a variation in color amongst plants. B) It allows for light in many wavelengths to be utilized for photosynthesis. C) It allows light to be harvested specifically in a step-wise manner. D) It shifts the equilibrium of photosynthesis toward the formation of products. E) both choices C and D
As a naturalist, you are responsible for training volunteers in the identification of the types of amphibians. The volunteers will use this information to correctly describe the animals to school groups that will visit your nature center. The training documentation for the volunteers lists important characteristics of the different groups of amphibian, but you notice that one of the items on the list is incorrect. Indicate which description is not correct.
A. Frogs and toads have external fertilization whereas salamanders and caecilians have internal fertilization. B. Frogs, toads, and most salamanders have four legs whereas caecilians are legless. C. Frogs and toads lay eggs whereas some caecilians lay eggs and others give birth to live young. D. Salamanders and caecilians have external tails whereas frogs and toads do not. E. Adult frogs, toads, and salamanders are predators of insects and other small animals whereas caecilians are herbivores.
PTH functions by ____
a. increasing osteoclast cell activity b. increasing bone formation c. decreasing vitamin D activity d. decreasing reabsorption of calcium by kidneys e. lowering blood calcium