Endosperm is:
a. a store of carbohydrate to fuel a seed's initial growth.
b. the male portion of a flowering plant.
c. tissue that develops into a protective seed coat surrounding the embryo.
d. the leaves that are part of the embryo.
e. the female portion of a flowering plant.
Answer: a. a store of carbohydrate to fuel a seed's initial growth.
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A. niche divergence. B. direct competition. C. indirect competition . D. predation. E. parasitism.
The stomata:
a. only open at night b. are open when guard cells are swollen with water c. close when the osmotic pressure of guard cells increases d. are covered by the cuticle to reduce water loss e. open and close in response to sunlight only
The products of photosynthesis are:
A) CO2 and sugar B) O2 and sugar. C) H2O and sugar. D) O2 and CO2
Protozoan cysts are resistant to many disinfection methods.
Answer the following statement true (T) or false (F)