Bateman put several males and females together in bottles for several days. 

He concluded that the number of offspring sired by a male increased in proportion to the number of females he mated.

In contrast, the number of offspring produced by a female did not increase with the number of males she mated.

TLS Online TPP Program

#Id: 7478

#Unit 4. Cell Communication and Cell Signaling

IgM antibodies are produced first in a humoral immune response and tend to be of low affinity.

IgM molecules form pentamers that are stabilized by a single J-chain molecule.

This higher avidity of the pentamer compensates for the low affinity

TLS Online TPP Program

#Id: 8572

#Unit 2. Cellular Organization

Soft keratins, or cytokeratins, are found in epithelial cells and make up the skin.

TLS Online TPP Program

#Id: 6236

#Unit 8. Inheritance Biology

lethal allele

TLS Online TPP Program

#Id: 6360

#Unit 2. Cellular Organization

Repressors impede access of RNA polymerase to the promoter and Activators enhance the RNA polymerase–promoter interaction.

TLS Online TPP Program

#Id: 3605

#Unit 3. Fundamental Processes

There are two major steps to start translation

1. Activation of amino acids,

2. Assembly of ribosomes.