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TLS Online TPP Program

#Question id: 5560

In a newly fertilized egg, the vitelline layer ________.

#5. Developmental Biology

  1. lifts away from the egg and hardens to form a fertilization envelope

  2. secretes hormones that enhance steroidogenesis by the ovary

  3. reduces the loss of water from the egg and prevents desiccation

  4. provides most of the nutrients used by the zygote

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TLS Online TPP Program

#Question id: 11970

#7. System Physiology – Animal

Why do the cells of the digestive system secrete proteolytic enzymes, such as pepsin, in their inactive forms?
TLS Online TPP Program

#Question id: 19342

#12. Applied Biology

Which one of the following devices is used to measure the glucose level in blood or sweat?
TLS Online TPP Program

#Question id: 4755

#8. Inheritance Biology

When two albino snails were crossed, all of the F1 were pigmented. All F1 intercross would results
TLS Online TPP Program

#Question id: 12755

#10. Ecological Principles

Which of the following statements best describes why biologists are currently concerned with global warming and the thawing of permafrost in many areas of the tundra biome?
TLS Online TPP Program

#Question id: 5243

#8. Inheritance Biology

Auxotroph culture (His- and Lac-) culture of E. coli was mutagenised. On what media would one spread the mutagenised cells to select prototroph for both His+  and Lac+ cells?