Practice Questions

TLS Online TPP Program

#Question id: 9202

Which of the following statements regarding extinction is accurate?

#Unit 9. Diversity of Life Forms

A large percentage of species are immune from extinction; however, rates of extinction may increase with continued human impacts.
Extinctions occur only periodically, separated by long time spans with no extinctions.
Extinction is occurring at a similar rate now as compared to historical fossil evidence.
The small-population approach is inferior to the declining-population approach if the goal is to conserve the maximum number of species in a given region.

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TLS Online TPP Program

#Question id: 28270

#Unit 5. Developmental Biology

Increase in cGMP and Ca2+ stimulates flagellar movement in the sperm by activating__

a) mitochondrial GTP-generating apparatus

b) mitochondrial ATP-generating apparatus

c) Na+/K+ ATPase

d) dynein ATPase

TLS Online TPP Program

#Question id: 28271

#Unit 5. Developmental Biology

Kartagener triad syndrome is caused due to the___

TLS Online TPP Program

#Question id: 28272

#Unit 5. Developmental Biology

sulfate-containing polysaccharides in the egg jelly is responsible for___

TLS Online TPP Program

#Question id: 28273

#Unit 5. Developmental Biology

In sea urchins, the acrosome reaction is initiated by_____

TLS Online TPP Program

#Question id: 28274

#Unit 5. Developmental Biology

In case of sea urchin (Strongylocentrotus purpuratus), the acrosome reaction is initiated by_____

TLS Online TPP Program

#Question id: 28275

#Unit 5. Developmental Biology

what will happened when sulfated polysaccharide binds to its receptor on the sperm____

a) activates CatSper calcium channel

b) activates sperm membrane calcium transport channel

c) activates sperm membrane sodium-hydrogen exchanger

d) activates sperm membrane phospholipase enzyme