Sperm cells are produced in the
A. vas deferens.
B. penis.
C. urinary bladder.
D. testes.
D. testes.
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Transport proteins _____
a. are found only in eukaryotic cells b. allow only small molecules and ions to cross the membrane c. are required for small nonpolar molecules to cross the membrane d. allow ions and polar molecules to cross the membrane e. are peripheral membrane proteins
Based on the data in Table 18-1, which of the following primates has the most recent common ancestor with humans?
a. rhesus monkey b. gibbon c. tarsier d. gorilla e. orangutan
A torn tendon sidelines athletes for long periods of time because the tissues possess less vascular tissue than bone
Indicate whether the statement is true or false
In Drosophila, there are 2 linked genes, one that has a wild type allele for red eyes (p+) and a mutant allele for purple eyes (p) and the other gene is for wild type normal wings (vg+) and mutant vestigial wings (vg). If a test cross is conducted with a cis (coupling) heterozygote fly and a double mutant, you obtain a 24% recombination frequency. Based on this information, what percentage of red, normal winged flies would you expect to see in this cross?
a) 76% b) 38% c) 12% d) 24%