Which event occurs first during embryonic development?
A) gastrulation
B) neurulation
C) cleavage
D) organ formation
Answer: C
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In which tissue would you look for cells that function in point-to-point communication?
(a) connective. (b) epithelial. (c) muscle. (d) nervous
A rule of thumb known as the morphospecies concept holds that:
A. morphology may vary within a species on the basis of sex. B. morphology is generally consistent within a species. C. morphology is not a reliable indicator of common species. D. morphology may vary within a species on the basis of life stage.
Sugars are usually carried throughout the plant in which tissue?
a. cortex b. parenchyma c. xylem d. phloem e. cambium
Independent of whether an organism is an endotherm or ectoderm, the LEAST reliable indicator of an animal's metabolic rate is the amount of _____
A) food eaten in one day B) heat generated in one day C) oxygen used in mitochondria in one day D) water consumed in one day