Within a specific bacterial strain, all the capsules will appear uniform, exhibiting the same size and shape from cell to cell.
A) True
B) False
B) False
Feedback: Capsules have little regular morphology, differing in size and shape from cell to cel
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Individuals with one sickle cell allele and one normal hemoglobin allele are not affected by the malaria parasite
because of ____.
a. neutral mutations b. heterozygote advantage c. frequency-dependent selection d. disruptive selection e. stabilizing selection
In the prenatal diagnostic technique amniocentesis,
A) a needle is inserted into the umbilical cord to collect fetal blood for screening. B) a thin, flexible tube connected to a needle is inserted through the vagina and into the uterus to collect a tissue sample. C) fetal blood is collected directly from the chorionic villi near the cervix. D) a needle is inserted through the abdominal wall to collect amniotic fluid containing fetal cells. E) the procedure cannot be performed after the fifteenth week of gestation.
The part of the brain that directly controls secretions from the pituitary gland is the ___________
Fill in the blank(s) with the appropriate word(s)
Both fish and humans develop neurological symptoms and bloody skin lesions due to a sudden "bloom" of this algae.
A. diatoms B. Prototheca C. Phaeophyta D. Pfiesteria piscicida E. All of these choices are correct.