The appearance of ϒδ thymocytes and αβ thymocytes during mouse fetal development. Fetal animals generate

a) more αβ T-cells than ϒδ T-cells

b) the proportion of ϒδ T-cells generated drops off dramatically after birth

c) the proportion of αβ T-cells generated drops off dramatically after birth

d) more ϒδ T-cells than αβ T cells

TLS Online TPP Program

#Question id: 12289

#Unit 10. Ecological Principles

What probably explains why coastal and inland garter snakes react differently to banana slug prey?

TLS Online TPP Program

#Question id: 589

#Unit 1. Molecules and their Interaction Relevant to Biology

When varying the substrate concentration at a fixed concentration of enzyme it is observed that at low concentrations of substrate the reaction is ________,while at high concentrations of substrate the reaction is ________.

TLS Online TPP Program

#Question id: 12726

#Unit 13. Methods in Biology

Name the forms of DNA which have been derived under laboratory conditions.

TLS Online TPP Program

#Question id: 12075

#Unit 7. System Physiology – Animal

A 48-year-old woman complains of severe polyuria (producing about 0.5 L of urine each hour) and polydipsia (drinking two to three glasses of water every hour). Her urine contains no glucose, and she is placed on overnight water restriction for further evaluation. The next morning, she is weak and confused, her sodium concentration is 160 mEq/L, and her urine osmolarity is 80 mOsm/L. Which of the following is the most likely diagnosis?

TLS Online TPP Program

#Question id: 10642

#Unit 10. Ecological Principles

Which curve best describes survivorship in a songbirds and marine crustacean that molts respectively?