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Biology Final (2)-G
Biology Final (cont) - 1st Semester
| Question | Answer |
|---|---|
| (Example-sex-linked). Baldness is a sex-linked trait carried on the X chromosome. Show the results of the following crosses. a. pure normal female x bald male b. heterozygous female x normal male | (Show what % of females will be carriers and what % of males are bald). Answer to a. = 100% females-carriers, 0% males-bald. Answer to b. = 50% females-carriers, 50% males-bald. |
| What is the term for a feature that allows an organism to survive better in its environment? | adaptation |
| The remnant of an organ that had a function in an early ancestor is known as a _________ . | vestigial structure (like ostrich wings, human wisdom teeth) |
| What is the process in which humans breed organisms for certain traits? | artificial selection |
| Individuals that are well adapted to their environment will survive and produce _____ . | more offspring |
| A population that has a NORMAL distribution of the range of heights has many individuals who are | Average height and few are very tall or very short. |
| What type of isolation occurs when the timing of reproduction is different between two populations? | temporal |
| Give some examples of sexual selection and describe why females get to do the choosing? | Examples - males are biggest, fight other males, are the brightest color or best dancer, etc. Females pick a mate, because they have limited gametes and limited mating time. |
| List and describe 4 Evidences of Evolution (give examples of each) | 1. Fossils - related to modern animals (like giant armadillo in Argentina) 2. Geologic/Geography - Darwn's finches were different on different islands. 3. Embryology - fetus look similar to other species. 4. Anatomy - vestigial structures had a use. |
| Name Darwin's 4 Principles of Evolution. | 1. Variety 2. Overproduce (all organisms overproduce) 3. Adapt (all organisms adapt) 4. Descent with modification |
| Finch species in the Galapagos islands have a wide variety of beak shapes. The theory of natural selection suggests that these differences arose because | individual finches adapted to their environment. |
| In general where does greater biodiversity exist and why? | (see question 27, Test 1) |
| Briefly describe 4 basic characteristics that all living things on earth have in common. | 1)cells 2)reproduce 3)respond 4)energy |
| Tell what homeostasis is and give an example. | regulation and maintenance of constant internal conditions (like temperature, fluids, nutrients, gases) |
Created by:
KMcCoy
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