Following statements are regarding to Shivering, which is the most potent mechanism for increasing heat production in the body. 

A. Cold environmental temperatures activate centers in the posterior hypothalamus during shivering, which then activate the α and γ motoneurons innervating skeletal muscle. 

B. Shivering involves skeletal muscle contracts rhythmically, generating heat and raising body temperature.

C. Shivering involves stimulation of Na+-K+ ATPase and raising body temperature.

D. Shivering involves stimulation of β receptors in brown fat, which increases metabolic rate and heat production.

Which of the following combination is correct?

#Question id: 11715

#Unit 10. Ecological Principles

The lifetime dispersal area of a particular species of drosophila is 0.2 km2. What else would we need to know to determine the neighbourhood size for this species?

#Question id: 11716

#Unit 10. Ecological Principles

Macroecology addresses patterns of range size and population density. Which of the following statements is true?

#Question id: 11717

#Unit 6. System Physiology – Plant

Inhibitors of the third stage of the gibberellin biosynthetic pathway is___

#Question id: 11718

#Unit 6. System Physiology – Plant

The enzymes and genes of the Gibberellin biosynthetic  pathway  have been characterized,  Most notable from a regulatory standpoint are___A) biosynthetic enzymes  and  B) metabolic enzymes involved from which enzymes?

#Question id: 11719

#Unit 6. System Physiology – Plant

Gibberellin conjugates are particularly prevalent in some seeds. The conjugating sugar is usually glucose, and it may be attached to the gibberellin via,

a) a carboxyl group forming a gibberellin glycosyl ether

b) a hydroxyl group forming a gibberellin glycosyl ether

c) a carboxyl group forming a gibberellin glycoside

d) a hydroxyl group forming a gibberellin glycoside

which one of the following is the correct statements about conjugation?

#Question id: 11720

#Unit 6. System Physiology – Plant

The embryo, which will grow into the new seedling, has a specialized absorptive organ that is___