Which gene will encode a transcription factor that will signal a cluster of embryonic cells to give rise to an appendage?
a. Dlx
b. All of the genes in the body help develop the appendages
c. Hoxc6
d. Hox
e. There is no master gene that determines appendage formation.
a
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Imperfect conditions in flowers refer to which of the following?
A. how the flower shape looks B. whether there are missing parts such as petals C. where the flower grows D. how often the flower blooms E. whether sexual parts are missing
An animal that maintains its body temperature by using heat generated from its own metabolism is a(n)
A. amniote. B. thermophile. C. endotherm. D. ectotherm. E. mesophile.
A fertilized egg can develop into all the types of cells in the body and is therefore considered to be _____
a) totipotent b) pluripotent c) unipotent d) multipotent
Some protists have a pellicle. What is a pellicle used for?
a. food storage b. defensive purposes c. structural support d. water absorption