T lymphocytes that have CD8 glycoproteins are (cytotoxic/helper/regulatory) T cells.
Fill in the blank(s) with the appropriate word(s).
cytotoxic
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If you were to discover a new species of animal that did not have body segments, but shed its exoskeleton and was a protostome, under the molecular phylogenetic scheme, you would allocate it to which of the following phyla?
A. Mollusca B. Echinodermata C. Nematoda D. Platyhelminthes E. Arthropoda
The lower neck of the uterus opening into the vagina is the ____________________
Fill in the blank(s) with correct word
One difference between mitosis and meiosis is ________
A) mitosis produces cells genetically identical to the parent cell, but meiosis does not B) mitosis produces more daughter cells for each division than meiosis C) mitosis produces haploid cells, but meiosis produces diploid cells D) mitosis requires only one parent cell, but meiosis requires two parent cells
The frequency of heterozygosity for the sickle cell anemia allele is unusually high, presumably because this reduces the frequency of malaria. Such a relationship is related to which of the following?
A) Mendel?s law of independent assortment B) Mendel?s law of segregation C) Darwin?s explanation of natural selection D) Darwin?s observations of competition E) The malarial parasite changing the allele