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TLS Online TPP Program

#Question id: 7178

In sea urchin, the large micromeres are autonomously specified. They inherit maternal determinants that were deposited at the vegetal hemisphere of the egg; these become incorporated into the large micromeres at fourth cleavage. When an isolated animal hemisphere is combined with isolated micromeres, then what will be the result?

#Unit 5. Developmental Biology
  1. A recognizable pluteus larva is formed, with all the endoderm derived from the animal hemisphere.
  2. Animal hemisphere becomes a ciliated ball of undifferentiated ectodermal cells.
  3. Micromeres differentiate into skeletal rods while the induced animal cap cells to form ectoderm.
  4. The vegetal cell fates are not specified, and the entire embryo develops as a ciliated ectodermal ball.
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TLS Online TPP Program

#Question id: 4698

#Unit 9. Evolution & Diversity of Life Forms

It has been observed that organisms on islands are different from, but closely related to, similar forms found on the nearest continent. This is taken as evidence that
TLS Online TPP Program

#Question id: 4699

#Unit 9. Evolution & Diversity of Life Forms

The theory of evolution is most accurately described as
TLS Online TPP Program

#Question id: 4700

#Unit 9. Evolution & Diversity of Life Forms

Which of the following is not an observation or inference on which natural selection is based?
TLS Online TPP Program

#Question id: 4701

#Unit 9. Evolution & Diversity of Life Forms

Charles Darwin discussed all of the following EXCEPT:
TLS Online TPP Program

#Question id: 4702

#Unit 9. Evolution & Diversity of Life Forms

Which of the following is correct match?
TLS Online TPP Program

#Question id: 4703

#Unit 9. Evolution & Diversity of Life Forms

Within a few weeks of treatment with the drug 3TC, a patientʹs HIV population consists entirely of 3TC-resistant viruses. How can this result best be explained?