All the sepals of a flower are collectively known as the:a
calyx.
b. carpel.
c. corolla.
d. pistil.
e. receptacle.
a
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A mass of hyphae in an ascomycete is commonly referred to as a(n)
A. mycelium. B. mycorrhizae. C. conidium. D. sporangium. E. ascus.
Cells of the immune system are not found in which of the following tissues in the gastrointestinal tract?
A. Peyer's patches B. Tonsils and adenoids C. Appendix D. Tooth enamel
The fact that the average human birthweight remains at about seven pounds is due to
a. modern prenatal care. b. the forces of stabilizing selection. c. conscious effort on the part of mothers. d. the limitations of food sources. e. selection tendencies moving in the direction of increasing birthweight.
Which gland is active in the building up of the body's defense system and is larger in infants and children?
A) thyroid B) pancreas C) posterior pituitary D) thymus