Within which structure in the human body does specialization of parts of the developing baby take place?
A. ovary
B. uterus
C. testis
D. pancreas
Answer: B. uterus
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During stationary phase, group members of Serratia produce prodigiosins that contain pyrrole
Considering its structural relatedness to other pyrrole-containing molecules of known function (e.g., chlorophylls, bacteriochlorophylls, porphyrins), propose a potential ecological role for these compounds in soil where they are involved in something other than photosynthesis. What will be an ideal response?
Which of the following statements is true regarding the experiment described in the text to investigate plant communication via volatile chemicals?
A. The investigators found that volatile chemicals released from damaged plant tissues attract predators but do not affect neighboring plants. B. The experimental plants were exposed to air that had passed through a chamber containing plants with simulated herbivore damage. C. The investigators were testing the hypothesis that volatile chemicals released from plants attract herbivore predators. D. The investigators found that only the damaged plants contained elevated levels of defensive compounds in their leaves when compared with control plants. E. The investigators disproved the hypothesis that some plants "eavesdrop" on their neighbors' defense responses.
As a child grows, the lungs increase in size as well. Hypothesize what the pressure of the gases within the lungs would be if the lung volume of an individual goes from 3000ml to 4000ml.
A. gas pressure would decrease B. gas pressure would be unchanged C. gas pressure would increase
An ncRNA consists only of several stem loop structures. What is a likely function of this ncRNA?
A. inactivating the X chromosome in mammals by binding to DNA B. inhibiting translation by binding to an mRNA C. binding to other ncRNAs and preventing them from performing their function D. binding to components of the ribosome and facilitating its assembly E. regulating transcription by guiding histone modifying complexes to specific target genes