On a hot, dry day, plants close their stomata to conserve water. What impact will this have on photosynthesis?
What will be an ideal response?
It will reduce it because less carbon dioxide will be available
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Estuaries are important nurseries because of the relatively low numbers of predators in these areas
Indicate whether the statement is true or false
Ultimately, the child is diagnosed with a rare recessively inherited disease. The parents are tested for the gene, and both are found to be heterozygous. What would be the probability that the second child will have the disease?
A. 1/2 B. 1/16 C. 1/8 D. 1/4
Which is a benefit of sexual reproduction over asexual reproduction?
a. More offspring can be produced. b. The offspring are all identical to the parents. c. There is less variation from generation to generation. d. Evolution will occur at a slower rate when there are two parents. e. The interaction of the genes from both parents brings about genetic variation.
The Pap test for cervical cancer involves microscopic examination of cervical cells for cancerous cells. A new, rapid diagnostic test to detect human papilloma virus (HPV) DNA before cancer develops is done without microscopic exam. The steps involved in this FastHPV test are listed below. What is the second step?
a. Add an RNA probe for HPV DNA. b. add enzyme substrate. c. Add enzyme-linked antibodies against DNA-RNA. d. Lyse human cells. e. The order is unimportant.