They famous Urey-Miller experiments provided crucial support for which hypothesis?

a. the Endosymbiosis hypothesis
b. the Oparin-Haldane hypothesis
c. the RNA World hypothesis
d. the Dickerson oxidizing atmosphere hypothesis
e. the Hydrothermal vent hypothesis


B

Biology & Microbiology

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As adults, insulin signaling through its receptor kinase enables virtually every cell in our body to transport glucose across the plasma membrane into the cytosol. Insulin also induces some cells to divide

Based on what you know about cell signaling, discuss the sequence of events from the time when insulin encounters the cell to the cell's reaction, and how the signal comes to an end. What will be an ideal response?

Biology & Microbiology

The sporophyte is the dominant and conspicuous generation in

a. the fern allies and ferns. b. gymnosperms. c. flowering plants. d. all of the above.

Biology & Microbiology

Jorge has developed prostate cancer, so he undergoes an operation to remove the malignancy. What other structures will the cancer specialists look at to check for metastasis?

A) local arteries B) connecting veins C) neighboring lymph nodes D) portions of the liver

Biology & Microbiology

________ make(s) up more than half the volume of the brain.

A. Intercalated disks B. Neurons C. Neuroglia D. Hyaline cartilage E. Nerves

Biology & Microbiology