Is Euhadra aomorensis a species by the phylogenetic species concept? Explain
What will be an ideal response?
ANS:
Euhadra amorensis is not a species because it does not form a monophyletic group.
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Gene duplications may be caused by
A. the crossing over of misaligned chromosomes B. deletion of important genetic information. C. reciprocal translocations. D. position effect. E. None of the answers are correct
What is the name for the gap into which neurotransmitters are released?
A. gap junction B. synaptic cleft C. postsynaptic membrane D. presynaptic membrane E. impulse channel
In recessive lethal diseases such as Tay-Sachs disease, carriers have one copy of the normal allele and one copy of the allele for the disease. Carriers are represented in the Hardy-Weinberg formula by ________.
A. 2pq B. 1 - q C. the Hardy-Weinberg equilibrium D. the frequency of homozygous dominants plus frequency of heterzygotes plus the frequency of homozygous recessives
Which of the following can be used to estimate the number of microorganisms in a culture?
A. Measurements of microbial biomass B. Direct counts of microbial cells C. Counts of viable cells using colony growth procedures D. All of the choices are correct.