Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 5910
TLS Online TPP Program

#Question id: 7110

What may be the molecular trigger that causes cells in the presomitic mesoderm to finally condense into somites?

#Unit 5. Developmental Biology

  1. A gradient of retinoic acid exists that emanates both anteriorly and posteriorly from the somites.

  2. The FGF gradient drops off in the region that is forming somites.

  3. Periodic waves of c-hairy1 are expressed in the presomitic mesoderm, such that cells in the more anterior somites will have been exposed to fewer waves of c-hairy1 than the cells in more posterior somites.

  4. Signaling from the receptor Notch is required for somite formation.
More Questions
TLS Online TPP Program

#Question id: 23735

#Unit 8. Inheritance Biology

Phenotypic variation that is due to genetic differences is referred to as heritability. It can be the Broad-sense heritability and Narrow-sense heritability, the Broad-sense heritability which is ranges from 0 to 1. Identify the correct prediction about these ranges?
a) 0 is all of the phenotypic variance results from differences in genotype
b) 0 is all of the phenotypic variance results from environmental variation
c) 1 is all of the phenotypic variance results from differences in genotype
d) 1 is all of the phenotypic variance results from environmental variation
TLS Online TPP Program

#Question id: 23766

#Unit 7. System Physiology – Animal

The sensory receptors for vision are:
TLS Online TPP Program

#Question id: 23767

#Unit 7. System Physiology – Animal

The sensory receptors for vision are located on the:
TLS Online TPP Program

#Question id: 23768

#Unit 7. System Physiology – Animal

Which of the following cells function as photoreceptors?
TLS Online TPP Program

#Question id: 23769

#Unit 7. System Physiology – Animal

What are the difference between the cones and rode cells?
a. Cones are sensitive to low-intensity light and Rods are responsible for vision at higher light levels. 
b. Rods are sensitive to low-intensity light and cones are responsible for vision at higher light levels. 
c. Rods do not participate in color vision and cones do.
d. Cones do not participate in color vision and Rods do.
Choose correct statements accordingly
TLS Online TPP Program

#Question id: 23770

#Unit 7. System Physiology – Animal

What is the function of rods and cones in the eye?