If fertilization occurs, the seed will develop
from the
a. gametophyte.
b. ovary.
c. ovule.
d. pollen grain.
e. zygote
C
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In vulval development in Caenorhabditis elegans, the progenitor cell nearest to the anchor cell is exposed to the highest concentration of epidermal growth factor and activation of its EGF receptor promotes type I cell differentiation
The type 1 cell then prevents type 1 differentiation in adjacent progenitor cells, a mechanism called ____ inhibition. Fill in the blank with the appropriate word.
Antigens on red blood cells are hereditary traits that allow blood to be typed in different ways. One system is based on a gene with two alleles, M and N. If the frequency of the M allele in a population is 0.4, then according to the Hardy-Weinberg rule, the expected frequency of the heterozygous MN genotype is ________.
A. 0.36 B. 0.16 C. 0.6 D. 0.48 E. 0.24
Which type of organism would exhibit optimum growth at room temperature?
A) Psychrophiles B) Psychrotrophs C) Mesophiles D) Thermophiles
If a great volcano blew up and almost everyone nearby was killed, we would say that this was due to a(n) ________ regulating factor
Fill in the blank(s) with correct word