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TLS Online TPP Program

#Question id: 9609

Dozens of potato varieties exist, differing from each other in potato-tuber size, skin color, flesh color, and shape. One might construct a classification of potatoes based on these morphological traits. Which of these criticisms of such a classification scheme is most likely to come from an adherent of the phylocode method of classification?

#Unit 9. Diversity of Life Forms
  1. Flesh color, rather than skin color, is a valid trait to use for classification because it is less susceptible to change with the age of the tuber.
  2. Flower color is a better classification criterion, because below-ground tubers can be influenced by minerals in the soil as much as by their genes.
  3. The only biologically valid classification of potato varieties is one that accurately reflects their genetic and evolutionary relatedness.
  4. The most accurate phylogenetic code is that of Linnaeus. Classify potatoes based on Linnaean principles; not according to their color.
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TLS Online TPP Program

#Question id: 10519

#Unit 6. System Physiology – Plant

Which of the following toxins derived from the fungus Cochliobolus carbonum inhibits specific histone deacetylases in maize?
TLS Online TPP Program

#Question id: 10520

#Unit 6. System Physiology – Plant

Which one of the following fungus causes infected rice shoots to grow much faster relative to uninfected plants and responsible for the “foolish seedling disease” of rice?
TLS Online TPP Program

#Question id: 10521

#Unit 6. System Physiology – Plant

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

#Unit 6. System Physiology – Plant

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

#Unit 6. System Physiology – Plant

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: 10524

#Unit 6. System Physiology – Plant

Members of the Poaceae family, which includes all of the cereal crops, use benzoxazinoids, these alkaloids shows;

a) Alkaloids are derived from the tryptophan as constitutively produced defensive secondary metabolites

b) These benzoxazinoids such as DIBOA and its derivative DIMBOA are usually stored in the peroxisome

c) Upon damage, the inactive glycosides are hydrolyzed, generating glucosinolate, which are toxic not only to insect herbivores but also against pathogens

d) DIBOA and DIMBOA perform insecticidal and pesticidal activities

e) It can be inactivated by hydroxylation and N-glycosylation reactions

Which of the following combination is correct about benzoxazinoids alkaloids?