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
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
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