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TLS Online TPP Program

#Question id: 5567

The cortical reaction of sea urchin eggs functions directly in ________.

#Unit 5. Developmental Biology

  1. the formation of a fertilization envelope

  2. the production of a fast block to polyspermy

  3. the release of hydrolytic enzymes from the sperm

  4. the generation of an electrical impulse by the egg

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TLS Online TPP Program

#Question id: 11085

#Unit 7. System Physiology – Animal

The diagrams show changes in the partial pressures of oxygen and carbon dioxide as blood flows from the arterial end to the venous of the pulmonary capillaries. Which diagram best depicts the normal relationship between Po2 (red line) and Pco2 (green line) during resting conditions?
TLS Online TPP Program

#Question id: 20325

#Unit 4. Cell Communication and Cell Signaling

In Gram-negative bacteria, autoinducers are often produced from
TLS Online TPP Program

#Question id: 14776

#Unit 13. Methods in Biology

A single letter is selected at random from the word “PROBABILITY”. The probability that it is a vowel is
TLS Online TPP Program

#Question id: 7118

#Unit 5. Developmental Biology

At the molecular and cellular level, how does morphogenesis differ from establishment of embryonic axes and the specification of cellular identity?
TLS Online TPP Program

#Question id: 2594

#Unit 2. Cellular Organization

During mitosis, the breakdown of the nuclear envelope depends on the disassembly of lamin filaments that form a meshwork supporting the membrane.  How is that breakdown accomplished?