Most transpiration occurs through stomata
____________________ Indicate whether the statement is true or false.
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Which of the following are NOT substrates for methanogens?
A) acetate and pyruvate B) carbon dioxide, carbon monoxide, and formate C) glucose and sucrose D) methanol, methylamine, and methylmercaptan
Gonadotropin-releasing hormone regulates
A. follicle-stimulating hormone. B. luteinizing hormone. C. steroid production by the gonads. D. both follicle-stimulating and luteinizing hormones. E. both follicle-stimulating and luteinizing hormones as well as steroid production by the gonads.
When the antigens on the surface of red blood cells react with antibodies in the serum, the cells clump together. This process is called
Trisomy 21, or Down syndrome, occurs when there is a normal diploid chromosomal complement but one (extra) chromosome 21. While there is reduced fertility in both sexes, females have higher fertility than males. Van Dyke et al. (1995; Down Syndrome
Research and Practice 3(2 ): 65-69 ) summarize data involving children born of Down syndrome individuals. Given the fact that conceptuses with 48 chromosomes (four #21 chromosomes) are not likely to survive early development, what percentage of surviving offspring would be expected to have Down syndrome if both parents have Down syndrome? A) One-third of the surviving offspring would be expected to have Down syndrome. B) All the children would be expected to have Down syndrome. C) One-half of the surviving offspring would be expected to have Down syndrome. D) Two-thirds of the surviving offspring would be expected to have Down syndrome. E) None of the surviving offspring would be expected to have Down syndrome.