All of the following are true of angiosperm
gametophytes EXCEPT that they
a. produce haploid sex cells.
b. arise from cells within the flowers.
c. are independent of the sporophyte.
d. produce eggs and/or sperm cells.
e. develop by mitosis.
Answer: c
You might also like to view...
Why does the polymerase chain reaction require the samples to undergo numerous cycles, each
containing three different temperatures?
a. The initial cycles don't produce many copies of the original gene since the amplification is exponential in nature. b. The three temperatures are for different processes; the highest temperature separates the double stranded DNA into single strands, the lower temperatures allow a target primer to bind and a DNA polymerase to generate new sequences. c. The enzyme used is from an organism that thrives in high temperatures, so high temperatures must be used. d. Non-target DNA is made during the first 10 cycles so further cycles are required to specifically amplify the target DNA. e. Once the enzyme starts working, you cannot stop the reaction until there are no more nucleotides.
Suppose a single nondisjunction event occurs during anaphase II of meiosis in a normal male cell from meiosis I. Of
the resulting sperm, ____.
a. three would be normal and one would have an extra chromosome b. two would be normal, one would have an extra chromosome, and one would be missing a chromosome c. two would have an extra chromosome and two would be missing a chromosome d. all four sperm would have an extra chromosome e. three would have an extra chromosome and one would be normal
After DNA fragments with complementary sticky ends base pair, ____seals the gaps between the fragments to produce
a continuous DNA molecule.
a. plasmids b. E. coli c. EcoRI d. DNA ligase e. restriction enzymes
Density-independent factors which play a role in regulating population size in nature include
A. natural disasters. B. geographical barriers. C. weather. D. All of the choices are correct.