Answer the question using the accompanying figure. The oceanic zone is represented by letter ____
a. A
b. B
c. C
d. D
e. E
ANSWER: d
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Answer the following statements true (T) or false (F)
1) Cytokinesis in plant cells occurs by means of a cleavage furrow. 2) DNA replication occurs in mitosis. 3) Mitosis and cytoplasmic division result in the formation of two genetically identical cells. 4) Germ-line cells are haploid but gametes are diploid. 5) At the end of meiosis I, each daughter cell contains the sister chromatids from only one chromosome from each chromosomal pair. 6) XY individual with a loss-of-function mutation in the SRY gene is expected to be female.
Which event in the sequence of photosynthesis occurs before all the others in the list?
a. Energy carrier molecules ATP and NADPH are created b. Water is broken apart to donate an electron inside the thylakoid space c. Photons of light stimulate pigments within the thylakoid membrane inside of a chloroplast d. Electrons are transported down an electron transport chain e. Carbon dioxide is converted into sugar.
If a population of 1000 individuals has 160 aa genotypes, the genotype frequency of the aa genotypeis:a
0.016. b. 0.08. c. 0.16. d. 0.8. e. 1.0.
Genomic imprinting is generally due to the addition of methyl (-CH3 ) groups to C nucleotides and chemical histone changes to silence a given gene
If this depends on the sex of the parent who transmits the gene, which of the following must be true? A) Genes required for early development stages must not be imprinted. B) Methylation of this kind must occur more in males than in females. C) Methylation must be reversible in ovarian and testicular cells. D) The imprints are transmitted only to gamete-producing cells.