TLS Online TPP Program

#Question id: 1392


In the nematode C. elegans, ced-9 prevents apoptosis in a normal cell in which of the following ways?

#SCPH06 I Botany
  1. It prevents the caspase activity of ced-3 and ced-4.

  2. Ced-9 remains inactive until it is signaled by ced-3 and other caspases.

  3. Ced-9 cleaves to produce ced-3 and ced-4.

  4. Ced-9 prevents blebbing by its action on the cell membrane.

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TLS Online TPP Program

#Question id: 5566

#SCPH01 Biochemistry

In some rare salamander species, all individuals are females. Reproduction relies on those females having access to sperm from males of another species. However, the resulting embryos receive no genetic contribution from the males. Why do you think sperm are necessary for reproduction?

TLS Online TPP Program

#Question id: 5566

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

In some rare salamander species, all individuals are females. Reproduction relies on those females having access to sperm from males of another species. However, the resulting embryos receive no genetic contribution from the males. Why do you think sperm are necessary for reproduction?

TLS Online TPP Program

#Question id: 5566

#SCPH06 I Botany

In some rare salamander species, all individuals are females. Reproduction relies on those females having access to sperm from males of another species. However, the resulting embryos receive no genetic contribution from the males. Why do you think sperm are necessary for reproduction?

TLS Online TPP Program

#Question id: 5566

#SCPH28 | Zoology

In some rare salamander species, all individuals are females. Reproduction relies on those females having access to sperm from males of another species. However, the resulting embryos receive no genetic contribution from the males. Why do you think sperm are necessary for reproduction?

TLS Online TPP Program

#Question id: 5567

#SCPH01 Biochemistry

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

TLS Online TPP Program

#Question id: 5567

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

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