During the first few years after menopause, follicle-stimulating hormone (FSH) levels are normally extremely high. A 56-year-old woman completed menopause 3 years ago. However, she is found to have low levels of FSH in her blood. Which of the following is the best explanation for this finding?

#Question id: 11354

#Unit 10. Ecological Principles

C.B. Huffaker was able to maintain experimental populations of predator and prey (using species of mites) that exhibited recurring oscillations. What feature of Huffaker's experimental design was critical to this outcome?

#Question id: 15868

#Unit 12. Applied Biology

#Question id: 10549

#Unit 6. System Physiology – Plant

Following are the list of some of the molecular “danger signals” (column I) and its characteristics (column II)                                                                                         

 Column I                                                                                   Column II

 a) MAMPs                               i) produce from the pathogen molecules support their ability to successfully colonize their host and gain nutritional benefits

b) DAMPs                               ii) A plant response to insect herbivores involve both a wound response and the recognition of certain compounds abundant in the insect’s saliva or regurgitant

c) Effectors                             iii) are conserved among a specific class of microorganisms such as chitin for fungi, flagella for bacteria

d) Elicitor                                iv) molecules secrete from the damaging plant by herbivory such as Prosystemin

Which of the following is the correct match between the signals and their respective mechanism?

#Question id: 9261

#Unit 9. Diversity of Life Forms

#Question id: 1169

#Unit 4. Cell Communication and Cell Signaling

A loss-of-function mutation in which of the following would inhibit TGFβ signaling?