Biology: Unit 2 Elephants Test Review

exponential growth def and graph

J shaped curve; indicative of a population that it is still going

4 stages of mitosis, order in which they go and what happens in each

PMAT prophase: chromosomes condense and become visible metaphase: involves chromosomes moving to the center of the cell anaphase: chromosomes are equally pulled to either side of the cell telophase: chromosomes bunch up at either end

be able to recognize what stage cells are in

PMATI ; S shaped line on picture

logistic growth def and graph

S shaped curve; population that has reached its carrying capacity

turkey body cells have 80 chromosomes. after mitosis you would expect a resulting daughter cell to have how many chromosomes?

80

base pairing

A with T; C with G

what if too much nitrogen

causes algae blooms

purpose of mitosis

cell reproduction, growth, and repair

cells that are made in mitosis how do they compare to original cell

cells are identical

sugar in DNA

deoxyribose

4 different values of species

environmental value: species has value because other organisms rely on it aesthetic value: species has value because it is attractive in some way. economic value: species has value because it has financial value of some sort. intrinsic value: species has value in and of itself; no direct human benefit

niche def and examples of partitioning

functional role that it plays in ecosystem; different species eat different parts of grass

gamete vs somatic cells and examples

gametes are the organism's reproductive cells (haploid). examples would be sperm and egg cells. somatic cells are any cells in the body that are not reproductive cells. examples would be muscles, skin, bones, etc.

where is genetic material found in cells

genetic material is found in the cell's nucleus

haploid vs diploid cells and examples

haploid: one set of chromosomes, (n)=23 for humans, in humans gametes (sperm and egg cells) are haploid diploid (prefix di- means 2): 2 sets of chromosomes, 2n=46 for humans; in humans all body cells are somatic cells (diploid) (other than gametes) are diploid

keystone species def and examples

have a large impact on their habitat, given their size or numbers; ex: beaver, parrotfish, elephants, wolves

3 phases of cell cycle and which one takes the longest/shortest

interphase is the longest stage and is preparation for cell division; mitosis and cytokinesis have the same time length

nitrifying and dentrifying bacteria

nitrifying takes ammonium and ammonia to nitrite and nitrate dentrifying takes nitrite to atmospheric nitrogen

rungs of the molecule of DNA are made up of what

nitrogen containing base

monomers of DNA

nucleotides

3 parts of the nucleotide

phosphate, deoxyribose sugar, nitrogen-containing base

characteristics of living things

reproductions, response to stimuli, organization, homeostasis, metabolism, and evolution

knkow overall survey methods used for animals in the wild

species range, individual range, aerial survey, individual registration, acoustic surveys, dung transects

what are chomosomes

structure of DNA found in the nucleus of the cell (sperm and egg cells have none)

carrying capacity

the amount of animals/humans in a population that the ecosystem can uphold

why do we have tuskless elephants? how did they come about? what gender are they usually?

we have tuskless elephants because tusked elephants are targeted for their tusks. tuskless elehpants are usually female

which bases are pyrimidines?

bases C and T (cytosine and thymine)

how does ammonia get into soil

ammonia gets into the soil by decaying organic matter

which bases are purines?

bases A and G (adenine and guanine)