Which of the following statements is NOT correct about flowering plants?
Select one:
a. A sperm nucleus combines with one polar nucleus to form the endosperm.
b. A sperm nucleus combines with the egg nucleus to eventually form the embryo.
c. A pollen grain may be carried to the stigma of the ovary by the wind.
d. A pollen tube grows down the style.
e. They exhibit double fertilization.
a. A sperm nucleus combines with one polar nucleus to form the endosperm.
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The anatomical structure identified with the letter "H" in the accompanying figure is the ____
a. myocardium b. pulmonary veins c. inferior vena cava d. right atrium e. heart apex
the prose Darwin used to describe his broad theory of evolution is "Descent with ---"
Fill in the blank(s) with the appropriate word(s).
A gene for the MN blood group has codominant alleles M and N. If both children are of blood type M, which of the following is possible?
A) Each parent is either M or MN. B) Each parent must be type M. C) Both children are heterozygous for this gene. D) Neither parent can have the N allele.
What explains the difference between Gross and Net energy of food metabolism?
What will be an ideal response?