Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 48278
TLS Online TPP Program

#Question id: 5560

In a newly fertilized egg, the vitelline layer ________.

#SCPH28 | Zoology

  1. lifts away from the egg and hardens to form a fertilization envelope

  2. secretes hormones that enhance steroidogenesis by the ovary

  3. reduces the loss of water from the egg and prevents desiccation

  4. provides most of the nutrients used by the zygote

More Questions
TLS Online TPP Program

#Question id: 4741

#SCPH01 Biochemistry

The F2 progeny from a particular cross exhibit a modified dihybrid ratio of 9 : 7 (instead of 9 : 3 : 3 : 1). What phenotypic ratio would be expected from a testcross of the F1?
TLS Online TPP Program

#Question id: 8930

#SCPH06 I Botany

Soon after the coelom begins to form, a researcher injects a dye into the coelom of a deuterostome embryo. Initially, the dye should be able to flow directly into the
TLS Online TPP Program

#Question id: 1407

#SCPH06 I Botany

Which of the following is pro-apoptotic?

a. Bax              b. Bcl-2                       c. p53              d. protein kinase B      e. PTEN
TLS Online TPP Program

#Question id: 4968

#SCPH06 I Botany

Which of these observations fails to support the endosymbiotic theory for the origin of eukaryotic cells?
TLS Online TPP Program

#Question id: 15608

#SCPH01 Biochemistry

Melanins are light-absorbing biopolymers useful as topical sunscreens, sunlight-protective coatings for plastics, etc. Which gene is used for producing melanin.