TLS Online TPP Program

#Id: 3237

#Unit 4. Cell Communication and Cell Signaling

miR-15-a and miR-16-1 act like tumor-suppressors;
they normally inhibit B cell proliferation

TLS Online TPP Program

#Id: 7992

#Unit 10. Ecological Principles

Excretory organs such as

a. Flame cells 

b. Nephridia 

c. Gills

d. Water vascular system

e. Kidneys  excrete these wastes.

TLS Online TPP Program

#Id: 5535

#Unit 7. System Physiology – Animal

The ascending limb, both the thin & the thick segments is virtually impermeable to water, a characteristic that is important for concentrating the urine.

TLS Online TPP Program

#Id: 7338

#Unit 11. Evolution and Behavior

Nonrandom Mating Nonrandom mating affects the way in which alleles combine to form genotypes and alters the genotypic frequencies of a population.

TLS Online TPP Program

#Id: 7750

#Unit 1. Molecules and their Interaction Relevant to Biology

The greater the effective nuclear charge the more tightly an electron is held in by the nucleus because there is less electron shield between the valence electrons and the nucleus, and so, the smaller the radius.