When planting seeds, why should you plant more seeds than you expect to grow?
a. Animals may eat some seeds.
b. Some seeds may not germinate.
c. The wind may disperse some seeds to an unsuitable environment.
d. all of these
D
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Which of the following should have had gene sequences most similar to the charophyte (stonewort) that was the common ancestor of the land plants?
A) early angiosperms B) early bryophytes C) early gymnosperms D) early lycophytes E) early pterophytes
The statement, "The total amount of energy in the universe is constant," is a tenet of
A) the first law of thermodynamics. B) the second law of thermodynamics. C) thermodynamic spontaneity. D) entropy. E) enthalpy.
The current understanding of cell membrane structure is based on the ________ model
Fill in the blank with correct word.
About ____ percent of all newborns are affected with an abnormal karyotype
a. 0.001 b. 0.01 c. 0.05 d. 0.5 e. 1.0