Transient local changes in the resting potential of a cell are called graded potentials because they can vary in size
In a phenomenon known as ________, many incoming signals produce progressively larger graded potentials in a cell — larger than any single impulse would produce alone. Fill in the blank(s) with correct word
summation
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Which of the following is NOT a hallmark of cancer?
A. Cell division in the absence of growth signals. B. Resistance to signals that slow cell division or promote death. C. Metastasis, which allows invasion of local tissues. D. Ability to stimulate growth of blood vessels to provide nutrients to the rapidly growing tumor. E. All of these choices are hallmarks of cancer.
DNA is removed from the genome and moved to a new position.
Match the description with the appropriate term.
Duplicated chromosomes result in two sister chromatids that are held together by a centromere. Which of the following statements best describes the location of genes along these sister chromatids?
A. Sister chromatids have identical alleles but are located in different locations along each sister chromatid because of crossing-over during meiosis. B. Sister chromatids have identical genes, but different alleles. These are located in the same location on each sister chromatid. C. Sister chromatids have identical genes, but different alleles. Additionally, they are located in different locations along each sister chromatid because of crossing-over during meiosis. D. Sister chromatids have identical alleles that are located in the same place along each sister chromatid.
If a C3 plant that normally closes its stomata during hot, dry conditions were triggered to open them instead, the most likely outcome would be that
A. O2 enters the leaf, increasing the rate of photosynthesis. B. Glucose leaves the leaf, increasing the rate of photosynthesis. C. Water leaves the leaf, decreasing the rate of photosynthesis. D. CO2 enters the leaf, decreasing the rate of photosynthesis. E. More chlorophyll is made, increasing the rate of photosynthesis.