In sea urchin, the acrosome reaction has 2 components:

1. Exocytosis

2. Extension of the acrosomal process

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#Id: 9203

#Unit 11. Evolution and Behavior

Balance natural selection

Balancing selection is a type of natural selection that maintains genetic diversity in a population.

In balancing selection, two or more alleles are kept in balance, and therefore are  maintained in a population over the course of many generations.

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#Id: 5705

#Unit 7. System Physiology – Animal

The ACTH family is derived from a single precursor,

pro-opiomelanocortin (POMC)

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#Id: 6565

#Unit 7. System Physiology – Animal

TLS Online TPP Program

#Id: 8928

#Unit 2. Cellular Organization

ATM and ATR, activate a triad of related protein kinases: Chk1, Chk2, and MK2

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#Id: 7999

#Unit 10. Ecological Principles

The range of abiotic and biotic conditions under which a species persists is its realized niche. 

The realized niche determines the geographic range of a species or of various populations that compose a species.