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TLS Online TPP Program

#Question id: 5567

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

#I Life Science/ Life Sciences Group – I-V

  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: 3517

#SCPH28 | Zoology

The following two genotypes are crossed: AaBbCcddX AabbCcDd. What will number of different genotypes among the progeny of this cross?
TLS Online TPP Program

#Question id: 8860

#SCPH28 | Zoology

A radially symmetrical animal that has two embryonic tissue layers probably belongs to which phylum?
TLS Online TPP Program

#Question id: 5323

#SCPH28 | Zoology

An X-linked recessive gene produces red-green color blindness in humans. A woman with normal color vision whose father was color-blind marries a color-blind man. What is the probability that their son will be color-blind?
TLS Online TPP Program

#Question id: 11140

#I Life Science/ Life Sciences Group – I-V

Although the membrane of a "resting" neuron is highly permeable to potassium ions, its membrane potential does not exactly match the equilibrium potential for potassium because the neuronal membrane is also ________.
TLS Online TPP Program

#Question id: 22949

#I Life Science/ Life Sciences Group – I-V

How CONSTANS gene and its encoded protein involved in translating day length into a signal that converts a vegetative shoot meristem into a floral meristem?