after the baby is born the placenta and umbilical cord break free from the mother and are pushed out of her body
What will be an ideal response?
After Birth
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A biologist ground up some plant leaf cells and then centrifuged the mixture to fractionate the organelles. Organelles in one of the heavier fractions could produce ATP in the light
, whereas organelles in the lighter fraction could produce ATP in the dark. The heavier and lighter fractions are most likely to contain, respectively, _____. A) mitochondria and chloroplasts B) chloroplasts and peroxisomes C) peroxisomes and chloroplasts D) chloroplasts and mitochondria E) mitochondria and peroxisomes
Projects employing metagenomics could include (select all correct choices):
A. evaluation of a patient's gut bacteria. B. analysis of sewage. C. documenting mutations of HIV during infection. D. evaluation of a baby's mouth flora during her first year of life. E. tracking the cystic fibrosis gene in African populations.
In invertebrates, the hairs of taste receptors ____, while those of smell receptors ____
a. directly contact the stimulus; indirectly contact the stimulus b. are derived from microvilli and contain microfilaments; are derived from cilia and contain microtubules c. transmit signals to the temporal lobes; transmit signals to the parietal lobes d. perceive taste and pain stimuli; perceive odors and taste stimuli e. detect airborne molecules; function as chemoreceptors
Which of the following can be sensed by plants? I) gravity II) pathogens III) wind IV) light
A) only I and III B) only I, II, and IV C) only II, III, and IV D) I, II, III, and IV