The kinetic energy in wind can be harnessed to produce electricity.
Answer the following statement true (T) or false (F)
True
True. The kinetic energy in wind can be harnessed to produce electricity.
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Choose the two primary factors that contribute to the resting membrane potential of a neuron.
_____ K+ leak channels make the cell membrane more permeable to K+. _____ The sodium-potassium pump exports 3 K+ from the cell for every 2 Na+ it imports _____ Na+ leak channels make the cell membrane more permeable to Na+. _____ K+ leak channels cause a higher concentration of K+ outside the cell. _____ The sodium-potassium pump exports 3 Na+ from the cell for every 2 K+ it imports
Which of the following does NOT produce
variation? a. crossing over b. random alignment of chromosomes during meiosis c. asexual reproduction d. genetic recombination of alleles e. sexual reproduction
Which statement about the megasporocyte is true?
a. It undergoes meiosis to produce three haploid cells. b. It is a diploid cell located within an ovule. c. It divides mitotically to form a male gametophyte. d. It plays an important role in cross-pollination. e. It will give rise to the generative cell.
Which of the following would be an example of natural selection?
A. Mutations change the gene frequency of a population. B. All of the plants on an island are killed by a volcanic eruption. C. In a forest, the taller oak trees produce twice as many acorns as shorter ones. D. Mice that were painted with a white stripe by biologists were eaten by predators more often than those that were not painted.