In a plant, the exchange of gases with the environment involves
a. leaves.
b. roots.
c. stems.
d. all of these
D
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A dish of cells is treated with centrinone, a centriole inhibitor. These cells would no longer be able to ___
A. conduct photosynthesis B. synthesize proteins C. make ATP D. produce lysosomes E. divide
Even though echinoderms are considered advanced invertebrates, they are radially symmetric in a way similar to the simple cnidarians. What advantage does radial symmetry confer upon echinoderms?
What will be an ideal response?
Three loci, mitochondrial malate dehydrogenase that forms a and b (MDHa, MDHb), glucouronidase that forms 1 and 2 (GUS1, GUS2), and a histone gene that forms + and - (H+, H-) are located on chromosome 7 in humans
Assume that the MDH locus is at position 35, GUS at position 45, and H at position 75. A female whose mother was homozygous for MDHa, GUS2, and H+ and whose father was homozygous for MDHb, GUS1, and H- produces a sample of 1000 egg cells. Give the genotypes and expected numbers of the various types of cells she would produce. Assume no chromosomal interference.
A ligament connects
A. a cartilaginous joint. B. muscle to muscle. C. cartilage to bone. D. bone to bone. E. muscle to bone.