Answer the following statements true (T) or false (F)
1. Damage to the seminal vesicles would prevent sperm from becoming motile.
2. A human female has the largest number of primary oocytes at the onset of puberty.
3. Implantation of the blastocyst into the uterine wall is correlated with the degeneration of the corpus luteum.
4. Neurulation begins with the thickening of the ectoderm over the neural tube.
1. FALSE
2. FALSE
3. FALSE
4. FALSE
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What naturally occurring process is responsible for keeping the earth warm enough to sustain life?
A. Oceanic currents B. Decomposition C. Greenhouse effect D. Wildfires E. Atmospheric circulation
Which of the following is not a characteristic differentiating Neanderthals from modern humans?
a. Neanderthals had smaller brains. b. Neanderthals were shorter. c. Neanderthals had larger noses. d. Neanderthals were stronger. e. Neanderthals had projecting brow ridges.
Single-celled organisms have a limited number of biomolecular machines within them.
a. true b. false
Which of the following statements is TRUE about major histocompatibility (MHC) proteins?
A. All cells produce both class I and class II MHC proteins. B. MHC proteins can bind multiple epitopes simultaneously. C. All cells produce class II MHC proteins. D. Class I and II MHC proteins are on the cytoplasmic membrane. E. Class I MHC are secreted while class II is on the cytoplasmic membrane.