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TLS Online TPP Program

#Question id: 397

The loss of water from a plant by transpiration cools the leaf. Movement of water in transpiration requires both adhesion to the conducting walls and wood fibers of the plant and cohesion of the molecules to each other. A scientist wanted to increase the rate of transpiration of a crop species to extend its range into warmer climates. The scientist substituted a nonpolar solution with an atomic mass similar to that of water for hydrating the plants. What do you expect the scientist's data will indicate from this experiment?

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. The rate of transpiration will be the same for both water and the nonpolar substance.

  2. The rate of transpiration will be slightly lower with the nonpolar substance as the plant will not have evolved with the nonpolar compound.

  3. Transpiration rates will fall to zero as nonpolar compounds do not have the properties necessary for adhesion and cohesion.

  4. Transpiration rates will increase as nonpolar compounds undergo adhesion and cohesion with wood fibers more readily than water.

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TLS Online TPP Program

#Question id: 24563

#Unit 4. Cell Communication and Cell Signaling

Which of the following is NOT true for classical pathway of  complement activation?
TLS Online TPP Program

#Question id: 24564

#Unit 8. Inheritance Biology

A one type of nondisjunction leads to regions of tissue with different chromosome constitutions, a condition known as
TLS Online TPP Program

#Question id: 24565

#Unit 8. Inheritance Biology

A particular trait that are determined by autosomal genes and are inherited according to Mendel’s principles, this particular trait has higher penetrance in one of the sexes is known as
TLS Online TPP Program

#Question id: 24566

#Unit 8. Inheritance Biology

In some sheep, the presence of beard is produced by an autosomal allele that is dominant in males and recessive in females. A beard female is crossed with a homozygous beardless male. One of the resulting F1 females is crossed with a beardless male. What proportion of the male and female progeny from this cross will have beard in F2 generation?
TLS Online TPP Program

#Question id: 24567

#Unit 8. Inheritance Biology

In goats, a beard is produced by an autosomal allele that is dominant in males and recessive in females. If  cross the beardless female with heterozygous beard male, what will be the proportion of female beard in F1 generation?
TLS Online TPP Program

#Question id: 24568

#Unit 8. Inheritance Biology

Male-limited precocious puberty, results from an autosomal dominant allele (P). Males with precocious puberty cross with the normal puberty in female, what will be the probability of precocious puberty in male F1 generation?