TLS Online TPP Program

#Question id: 2678


Insertional inactivation of the lacZ gene on a plasmid can be used to screen for recombinants on a plate containing:

#Unit 2. Cellular Organization
  1. Tetracycline and ampicillin

  2. Tetracycline only

  3. IPTG and X-gal

  4. IPTG only

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TLS Online TPP Program

#Question id: 26903

#Unit 10. Ecological Principles

 Our ability to distinguish different biomes under similar conditions in different parts of the world depends primarily on which of the following factors that influence the distributions of growth forms?

TLS Online TPP Program

#Question id: 26904

#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

TLS Online TPP Program

#Question id: 26905

#Unit 10. Ecological Principles

The IUCN Red List is based on a set of criteria to evaluate species vulnerability to extinction. Which one or more of the options is/are used as criteria?
.Absolute population size
Geographic range
Economic value
Change in population size over time

TLS Online TPP Program

#Question id: 26906

#Unit 10. Ecological Principles

Match the Indian Biosphere reserves (Column P) with the key fauna (Column Q) they are intended to protection
 Which one of the following options has all correct matches between column P and Q?

TLS Online TPP Program

#Question id: 26907

#Unit 10. Ecological Principles

Soil that are said to be humus poor ____A____ and those soil that are said to be humus rich ___ B______.

TLS Online TPP Program

#Question id: 26908

#Unit 10. Ecological Principles

Many animals obtain their amino acids from the food they eat, though plants contain only small amount of amino acids, which types of animals has the capacity to synthesizes missing amino acids?