Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 36561
TLS Online TPP Program

#Question id: 4742

In birds, sex is determined by a ZW chromosome scheme. Males are ZZ and females are ZW. A recessive lethal allele that causes death of the embryo is sometimes present on the Z chromosome in pigeons. What would be the sex ratio in the offspring of a cross between a male that is heterozygous for the lethal allele and a normal female?

#Part-B Specialized Branches in Biotechnology

  1. 2:1 male to female

  2. 1:2 male to female

  3. 1:1 male to female

  4. 3:1 male to female

More Questions
TLS Online TPP Program

#Question id: 10521

#Part-B Specialized Branches in Biotechnology

Which is an example of a plant-derived DAMP found in tomato that is produced in response to wounding associated with herbivore activity?
TLS Online TPP Program

#Question id: 10522

#Part-B Specialized Branches in Biotechnology

Mechanical barriers provide a first line of defence against insect pests and pathogens, these mechanical barriers developed by plants;

                   COLUMN A  

                     COLUMN B

A. Thorns

i) It can be found on the stem and petioles of roses and are formed by the epidermis

B. Spines

ii) Found on a lemon tree (Citrus sp.) are modified branches, as can be seen by their position in the axil of a leaf

C. Prickles

iii) Found on shoot and leaves of tomato (Solanum lycopersicum) are derived from epidermal cells

D. Trichomes

iv) which are characteristic of cacti (Opuntia spp.) in the New World, are modified leaves

Match correctly following combination of barrier developed by plants ;
TLS Online TPP Program

#Question id: 10523

#Part-B Specialized Branches in Biotechnology

Conifer resin ducts, which are found in the cortex and phloem, contain a mixture of diverse terpenoids, which are released immediately upon damage by herbivores such as;

a) monocyclic terpenes like- limonene and terpinolene

b) bicyclic monoterpenes- α-pinene and β-pinene

c) tricyclic sesquiterpenes- longifolene, caryophyllene, and δ-cadinene

d) tetracyclic terpenes- longifolene, tetra-terpinolene terpenoids are incorrect?
TLS Online TPP Program

#Question id: 10525

#Part-B Specialized Branches in Biotechnology

The major cyanogenic glycoside in_____i______ is _____ii______.

a) i-sorghum, ii-Amygdalin

b) i-sorghum, ii-dhurrin

c) i-Cassava, ii-lotaustralin

d) i-Cassava, ii-linamarin

Which one is incorrect combination of cyanogenic glycoside?
TLS Online TPP Program

#Question id: 10526

#Part-B Specialized Branches in Biotechnology

What is elicitors? Which one is not belongs to the elicitor responses
TLS Online TPP Program

#Question id: 10527

#Part-B Specialized Branches in Biotechnology

Based on their feeding behaviors, three major types of insect herbivores can be distinguished, which evades the constitutive defense;

A) Phloem feeders                                                                    i) caterpillars, grasshoppers, and beetles

B) Cell-content feeders                                                            ii) aphids and whiteflies

C) Chewing insects                                                                    iii) mites and thrips

Correctly match the feeding behaviour with its insects;