Practice Questions

TLS Online TPP Program

#Question id: 9248

Which of the following is a consequence of biological magnification?

#Unit 9. Diversity of Life Forms

Toxic chemicals in the environment pose greater risk to top-level predators than to primary consumers.
Populations of top-level predators are generally smaller than populations of primary consumers.
The biomass of producers in an ecosystem is generally higher than the biomass of primary consumers.
Only a small portion of the energy captured by producers is transferred to consumers.

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TLS Online TPP Program

#Question id: 4738

#Unit 8. Inheritance Biology

Red kernel color in wheat results from the presence of at least one dominant allele of each of two independently segregating genes . Kernels on rr bb plants are white, and the genotypes R— bb and rr B— result in brown kernel color. Suppose that plants of a variety that is true breeding for red kernels are crossed with plants true breeding for white kernels produced F1 were allowed to selfing .what are F2 phenotype ratio ?

TLS Online TPP Program

#Question id: 3509

#Unit 8. Inheritance Biology

Principle of independent assortment apply for those gene that is

TLS Online TPP Program

#Question id: 16119

#Unit 7. System Physiology – Animal

Following statements are regarding to Shivering, which is the most potent mechanism for increasing heat production in the body.

A. Cold environmental temperatures activate centers in the posterior hypothalamus during shivering, which then activate the α and γ motoneurons innervating skeletal muscle.

B. Shivering involves skeletal muscle contracts rhythmically, generating heat and raising body temperature.

C. Shivering involves stimulation of Na+-K+ ATPase and raising body temperature.

D. Shivering involves stimulation of β receptors in brown fat, which increases metabolic rate and heat production.