When hydrogen and oxygen combine to form water, water would be
a) a product
b) a reactant
c) both a product and a reactant
d) neither a product nor a reactant
Ans: a) a product
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Which of the following correctly lists the components necessary for prokaryotic and eukaryotic transcription?
A. RNA polymerase, general transcription factors, DNA, and RNA nucleotides B. RNA polymerase, general transcription factors, DNA and DNA nucleotides C. ribosomes, general transcription factors, DNA and DNA nucleotides D. ribosomes, general transcription factors, DNA and RNA nucleotides
What simple tissue composed of living cells is responsible for supporting rapidly growing plant parts such as young
stems and leaf stalks?
a. vascular tissue b. dermal tissue c. collenchyma tissue d. sclerenchyma tissue e. parenchyma tissue
Which of the gamete combinations below is most likely to result in a normal embryo which dies because of abnormalities in the placenta?
1.egg / sperm
2.sperm / sperm
3.egg / egg
4.all are equally likely
The second law of thermodynamics states that
a. energy can be transformed into matter, and because of this, something is obtained for nothing. b. energy can be destroyed during nuclear reactions such as those that occur inside the sun. c. if energy is gained by one region of the universe, another place in the universe also must gain energy in order to maintain the balance of nature. d. energy tends to flow from concentrated to less concentrated forms. e. none of these is true.