TLS Online TPP Program

#Question id: 4812


Two character X and Y ,both follow law of dominance due to 3:1 F2 phenotypic ratio monohybrid cross separately If carry out dihybrid selfing cross for heterozygous genotype for both character does not follow law of independence assortment in normal environmental condition due to?

#SCPH28 | Zoology
  1. these two loci for character are linked       

  2. Low penetrance of gene in dihybrid cross

  3. Low expressivity of gene in dihybrid cross 

  4. Phenotypic plasticity

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TLS Online TPP Program

#Question id: 11382

#SCPH28 | Zoology

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: 11383

#SCPH06 I Botany

Following some condition are given for island.

Island P is small and near the mainland;

Island Q is small and far from the mainland;

Island R is large and near the mainland;

Island S is large and far from the mainland

Let NP, NQ, NR and NS denote the number of species on islands P, Q, R and S, respectively. Which of the following is consistent with the theory of island biogeography?

TLS Online TPP Program

#Question id: 11383

#SCPH28 | Zoology

Following some condition are given for island.

Island P is small and near the mainland;

Island Q is small and far from the mainland;

Island R is large and near the mainland;

Island S is large and far from the mainland

Let NP, NQ, NR and NS denote the number of species on islands P, Q, R and S, respectively. Which of the following is consistent with the theory of island biogeography?

TLS Online TPP Program

#Question id: 11384

#SCPH06 I Botany

Two islands, P and Q, are similar in habitat and other features. They are 100 and 200 km2 in size respectively, but have the same number of species. Which of the following statements can independently explain this observation?

(i) P is closer to the mainland than Q

(ii) P is further away from the mainland than Q

(iii) P has higher speciation rates than Q

(iv) P has lower speciation rates than Q

TLS Online TPP Program

#Question id: 11384

#SCPH28 | Zoology

Two islands, P and Q, are similar in habitat and other features. They are 100 and 200 km2 in size respectively, but have the same number of species. Which of the following statements can independently explain this observation?

(i) P is closer to the mainland than Q

(ii) P is further away from the mainland than Q

(iii) P has higher speciation rates than Q

(iv) P has lower speciation rates than Q

TLS Online TPP Program

#Question id: 11385

#SCPH06 I Botany

Which of the following biomes is correctly paired with the description of its climate?

A) savanna-low temperature, precipitation uniform during the year

B) tundra-long summers, mild winters

C) Taiga-relatively short growing season, Low precipitation

D) temperate grasslands-relatively warm winters, most rainfall in summer

E) tropical forests-nearly constant day length and temperature