TLS Online TPP Program

#Question id: 5561


In sea urchins, the "fast block" and the longer lasting "slow block" to polyspermy, respectively, are ________.

#Unit 5. Developmental Biology
  1. the acrosomal reaction and the formation of egg white

  2. the cortical reaction and the formation of yolk protein

  3. the jelly coat of the egg and the vitelline membrane

  4. membrane depolarization and the cortical reaction

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TLS Online TPP Program

#Question id: 11714

#Unit 10. Ecological Principles

In recognizing patchiness in the natural world, ecologists have developed three different models of populations. Which of these recognize(s) that there are differences in the quality of habitat patches without considering effects of differences in habitat quality within the habitat matrix?

TLS Online TPP Program

#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?

TLS Online TPP Program

#Question id: 11716

#Unit 10. Ecological Principles

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

TLS Online TPP Program

#Question id: 11717

#Unit 6. System Physiology – Plant

Inhibitors of the third stage of the gibberellin biosynthetic pathway is___

TLS Online TPP Program

#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?

TLS Online TPP Program

#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?