Which of the following hormones is not involved in stimulating spermatogenesis?
a. inhibin
b. follicle-stimulating hormone
c. interstitial cell stimulating hormone
d. luteinizing hormone
e. testosterone
A
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Staphylococcus aureus toxin is
A. heat-stable. B. an exotoxin. C. an endotoxin. D. heat-sensitive. E. heat-stable AND an exotoxin.
Which of the following is NOT true about
asexual reproduction?
a. offspring of asexual reproduction are genetically the same as their parent b. no mammals are known to reproduce asexually c. many invertebrates reproduce asexually d. asexual reproduction is advantageous in changing environments e. all of these are true about asexual reproduction
Abnormal cell division that does not pose a threat to surrounding tissues is termed _____
a. malignant b. benign c. metastatic d. carcinogenic e. repressed
Your house plant is growing slowly and lacks its normal bright green color, so you call a botanist for advice. She suggests that the plant may be deficient in magnesium (Mg2+). Why are these symptoms associated with Mg2+ deficiency?
A) Mg2+ is important in the structure of many amino acids. B) Lack of Mg2+ in the soil allows pathogenic bacteria to grow. C) Mg2+ is a cofactor for NADPH function. D) Mg2+ is an important component in chlorophyll. E) Cytochromes require Mg2+ to function properly.