I. Human pituitary prolactin has considerable structural similarity to human growth hormone and human chorionic somatomammotropin (hCS).

II. Structurally similar prolactin are secreted by the endometrium and by the placenta.

III. prolactin secretion is increased during pregnancy, reaching a peak at the time of parturition.

IV. The human prolactin receptor resembles the oxytocin receptor.

#Question id: 1560

#Unit 4. Cell Communication and Cell Signaling

An invertebrate, such as an insect, has innate immunity that can be nonspecific about which pathogens are prevented from harming its metabolism. Which of the following is most likely to function this way in the insectʹs intestine?

#Question id: 11382

#Unit 10. Ecological Principles

Ecologist has proposed following explanation to lead biodiversity at tropic.

a) Higher productivity in the tropics allows for more species

b)  Environments are more stable and predictable in the tropics, with fairly constant temperatures and rainfall levels year-round

c) Predators and pathogens limit competition in the tropics, which allows more species to coexist

d) High evolutionary speed at tropic than temperate

#Question id: 31414

#Unit 4. Cell Communication and Cell Signaling

#Question id: 3525

#Unit 8. Inheritance Biology

In a plant, red fruit (R) is dominant over yellow fruit (r) and tallness (T) is dominant over shortness (t). If a plant with RRTt genotype was crossed with rrtt plant results progeny, are

#Question id: 14146

#Unit 1. Molecules and their Interaction Relevant to Biology

Match the following

A. Cyanide 1. Inhibit cytochrome oxidase

B. Piericidin A 2. Prevent electron transfer from Fe-S center to ubiquinone

C. Antimycin A 3. Blocks electron transfer from cytochrome b to cytochrome c1

D. Valinomycin 4. K+ ionophore