Directional selection leads to fixation of the favored allele and elimination of the other allele.

TLS Online TPP Program

#Id: 7983

#Unit 10. Ecological Principles

Increased amounts of the amino acid proline or sugars such as glucose and fructose increase solute concentration, drawing water into the cells.

TLS Online TPP Program

#Id: 7984

#Unit 10. Ecological Principles

Sugars bind to phospholipids, helping stabilize cellular membranes, preventing them from becoming damaged during times of drought.

TLS Online TPP Program

#Id: 7985

#Unit 10. Ecological Principles

Some plants of arid habitats close their stomata in the day and open them at night, when it is cooler.

TLS Online TPP Program

#Id: 7986

#Unit 10. Ecological Principles

Urohydrosis - Some birds, such as vultures and storks, excrete urine on their legs, cooling themselves by evaporation.

TLS Online TPP Program

#Id: 7987

#Unit 10. Ecological Principles

TLS Online TPP Program

#Id: 7988

#Unit 10. Ecological Principles

Marine animals, which are hypo-osmotic, actively exclude salts. Some marine animals increase the concentrations of solutes, such as urea and amino acids, in their body fluids to match the osmotic potential of seawater and thus reduce the movement of water out of their bodies