This kettle lake formed 14,000 years ago when a glacier that covered the surrounding area melted. Initially devoid of animal life, overtime the lake was colonized by invertebrates and other animals. If you are a researcher, based on the background information, hypothesize how mutation, natural selection, genetic drift, and gene flow may have affected populations that colonized the lake.

You have a solution that contains phospholipid vesicles in a test tube. these vesicles have phospholipid bilayers, but do not contain any membrane transporters. you add a number of different molecules to the solution, and wait a period of time for them to equilibrate. if you could measure the concentration of each molecule, for which of the following would you expect to measure equal concentrations inside and outside of the vesicles? assume for this question that the overall osmolarity inside and outside the vesicles is the same (that is, there is no appreciable diffusion of water across the membrane). (select two answers) an amino acid with a hydrophobic side-chain a small non-polar molecule a negatively charged ion a small polar molecule a small lipid hormone

What role do traits play in affecting an organisms ability to reproduce? finches

Match the reproductive structures based on their function and the system to which they belong. egg ovary sperm vas deferens vagina fallopian tube testis urethra