Which result is an observed effect of global warming on organisms?
A) Some species of birds and frogs now begin their breeding seasons earlier in the year.
B) Corals "bleach" when decreased water temperatures cause them to expel their symbiotic algae.
C) Many butterfly populations have shifted their ranges toward the equator.
D) Many polar bears produce more offspring as their hunting grounds increase in size.
Answer: A
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Budding (select all correct choices):
A. is a form of asexual reproduction. B. is found in fungi, plants, and some animals. C. involves an unequal division between a mother and daughter cell or organism. D. leads to a mother cell and a daughter cell that are genetically very different. E. occurs when one organism is divided into pieces called buds.
A protein is destined to be secreted from a cell. In which of the following organelles would you expect to find the protein first?
A) endosome B) Golgi apparatus C) lysosome D) secretory vesicle
XO sex chromosomes are responsible for the following syndrome
A) Klinefelter syndrome B) Turner syndrome C) Jacob syndrome D) trisomy 21
Which of the following cells have reduced or very little active telomerase activity?
A) most normal somatic cells B) most normal germ cells C) most cancer cells