General

General

General nature or nature terms.

Industry: Natural environment

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General

sickle cell anemia

Biology; General

Human autosomal recessive disease that causes production of abnormal red blood cells that collapse (or sickle) and cause circulatory problems.

semen

Biology; General

A mixture of sperm and various glandular secretions.

stomach

Biology; General

The muscular organ between the esophagus and small intestine that stores, mixes, and digests food and controls the passage of food into the small intestine.

stomata

Biology; General

Pores on the underside of leaves that can be opened or closed to control gas exchange and water loss. Openings in the epidermis (usually of the leaf) that allow gas exchange.

semiconservative replication

Biology; General

Process of DNA replication in which the DNA helix is unwound and each strand serves as a template for the synthesis of a new complementary strand, which is linked to the old strand. Thus, one old ...

stop codon

Biology; General

The codon on a messenger RNA molecule where protein synthesis stops.

The division of water in lakes and ponds into layers with different temperatures and oxygen content. Oxygen content declines with depth, while the uppermost layer is warmest in summer and coolest in ...