Eating a meal leads to a large increase in gastric acid secretion that peaks within about 5 min and returns to normal about 4 hr after a meal is taken. How long after a meal does the pH of the gastric contents reach its lowest level (in hours)?

TLS Online TPP Program

#Question id: 9175

#Unit 9. Diversity of Life Forms

In deep water, which of the following abiotic factors would most limit primary productivity?

TLS Online TPP Program

#Question id: 24213

#Unit 1. Molecules and their Interaction Relevant to Biology

Choose the incorrect statement

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#Question id: 4823

#Unit 8. Inheritance Biology

Which one of the following DNA markers can be used to distinguish between a homozygote and heterozygote ?

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#Question id: 5212

#Unit 11. Evolution and Behavior

Barbara McClintock, famous for discovering that genes could move within genomes, had her meticulous work ignored for nearly 4 decades, but eventually won the Nobel Prize. Why was her work so distrusted?

TLS Online TPP Program

#Question id: 1567

#Unit 4. Cell Communication and Cell Signaling

Which of the following cell types are responsible for initiating a secondary immune response?