Why do certain traits exist within a population?

Traits confer some advantage.

Certain traits build up over time.

Each trait expresses variable fitness under equilibrium.

Traits usually result in sexual selection.

What part of the human body has the same role as the power source in a computer?

What would happen if guard cells in a plant stopped working? A. Diseases would quickly invade the plant. B. Photosynthesis would occur more slowly. C. Stomata would not open and close. D. Chloroplasts would change color.

Cells that only have one copy of each chromosome are called haploid cells. Which types of cells in our body are haploid?

What is the main energy source?

Is a type of malnutrition that results from chronically deficient intakes of both protein and overall calories?

Which has three subtypes known as patrilineal, matrilineal, and ambilineal?

Methods of include seeing for which a scientist could use a tool such as a microscope

An environmental group is opposing a proposed dam on a river. Damming the river would create a reservoir of water that could be used to supply drinking water to the surrounding community.

What ultimately controls the cell's production of proteins? A. DNA B. RNA C. protein D. allele

10. Briefly explain the secondary structure of a protein.