What observation(s) would distinguish a dividing animal cell from a dividing plant cell?
A) decondensing chromosomes positioned at opposite poles of the spindle
B) a bipolar spindle constructed from microtubules
C) the presence of centrioles would be a feature unique to plant cells
D) a constriction in the plasma membrane forming along the spindle equator
E) all of the choices are unique to animal cells
Answer: D) a constriction in the plasma membrane forming along the spindle equator
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The protists are a diverse group of organisms that have traditionally been grouped together because
they all
a. have the same type of nutrition. b. live in the same environments. c. have very similar DNA sequences. d. have very similar shapes. e. are not prokaryotes, fungi, plants, or animals.
The white cliffs of Dover, England are composed of the fossilized remains of:
1.diatoms
2.foraminifera
3.euglenoids
4.radiolarians
Are there any costs when asexual organisms reproduce automictically as opposed to apomictically?
a. Yes, recombination may disrupt coadapted gene complexes. b. Yes, recombination is the cause of the twofold cost of sex. c. No, both are forms of asexual reproduction. d. No, recombination will produce better adapted individuals. e. C and D.
Achondroplasia is a form of dwarfism caused by a dominant allele. The homozygous dominant genotype causes death, so individuals who have this condition are all heterozygotes. If a person with achondroplasia mates with a person who does not have achondroplasia, what percentage of their children would be expected to have achondroplasia?
A. 75% B. 0% C. 50% D. 100%