11-The ability of the human body to maintain a relativelyconstant internal environment is known as homeostasis
Select one:
True
False
12-Children born with Down syndrome have inherited an extrachromosome, so their diploid number is 47 rather than 46chromosomes. What is this genetic condition called?
Select one:
a.
haploid 21
b.
monoploidy
c. trisomy 21
d.
triploid
13-In which phase of meiosis I do homologues separate?
Select one:
a.
prophase II
b. anaphase
c.
anaphase I
d.
metaphase I
14-Crossing over occurs during ________ and is important becauseit ________.
Select one:
a. telophase II; creates daughter cells
b.
anaphase II; separates the homologouspairs
c.
metaphase I; reduces the chromosomenumber by half
d. prophase I; generates variation
15-If a cell begins mitosis with 36 chromosomes, there will be________ chromosomes in each cell after mitosis, and each daughtercell will be ________ genetically.
Select one:
a. 36; different
b.
18; different
c. 36; identical
d. 18; identical
16-Polar bodies are unique products of ________.
Select one:
a.
spermatogenesis
b.
mitosis
c.
oogenesis
d.
cytokinesis
17-The dark chemical that accumulates in the skin after exposureto the sun is called melanin
Select one:
True
False
18-From which of these phases of cellular respiration does thecell get the most ATP?
Select one:
a.
glycolysis
b. transition reaction
c. electron transport chain
d.
citric acid cycle
19-Albinism is due to the inability to make melanin
Select one:
True
False
20-These skin cells fight infections: neuroglia
Select one:
True
False
