bio

Question 1

cell division

Answer 1

the division of a cell into 2 daughter cells with the same genetic material. there are 3 main types of cell division: binary fission, mitosis and meosis

Question 2

Binary fission

Answer 2

Asexual reproduction Buy a separation of the body into two new bodies. An organism duplicates it’s genetic material or DNA and then divides into two parts (cytokinesis)with each new organism receiving one copy of the DNA. in prokaryotes binary fission does not involve mitosis but in single cell eukaryotes that undergo binary fission mitosis is part of the process

Question 3

Meiosis

Answer 3

A modified type of cell division in sexually reproducing organisms consisting of two rounds of cell division but only one round of dna replication. It results in cells with half the number of chromosome sets as the original self

Question 4

Mitosis

Answer 4

A process of nuclear division in eukaryotic cells conventionally divided into 5 stages: prophase, prometaphase, metaphase, anaphase and telophase. Mitosis conserves chromosome # by allocating replicated chromosome equally to each of the daughter nuclei

Question 5

Prokaryotic cell

Answer 5

A type of the cell lacking a membrane enclosed nucleus and membrane enclosed organelles. Organisms with prokaryotic cells such as bacteria and archaea are called prokaryotic cells

Question 6

Eukarya

Answer 6

The domain that includes all eukaryotic organisms

Question 7

Eukaryotic cell

Answer 7

A type of cell with a membrane enclosed nucleus and membrane enclosed organelles.organisms with eukaryotic cells( protist, plants , fungi, and animals) are called eukaryotes

Question 8

Chromosome

Answer 8

A cellular structure carrying genetic material found in the nucleus of eukaryotic cells. Each chromosome consists of one very long DNA molecule and associated proteins. A bacterial chromosome usually consist of a single circular DNA molecule and associated protein. And is found in the nucleotide region which is not membrane-bound

Question 9

Prophase (prepare)

Answer 9

condense chromatin into chromosomes, break down nuclear membrane, assemble mitotic spindle, centriole pairs move toward opposite poles of the cell)

Question 10

Metaphase (middle)

Answer 10

the chromosomes line up along the middle of the cell

Question 11

Anaphase (apart)

Answer 11

Sister chromatids pulled apart to opposite sides of cel

Question 12

Telophase (prophase on reverse)

Answer 12

During this phase the cells form to nuclear membranes around each set of chromosomes and the chromosomes uncoil. The cell walls then pinch off in split down the middle. The two new cells or daughter cells are formed. The splitting of the cells is called cytokines or cell cleavage.de-condense chromosomes, re-form nuclear membrane, break down mitotic spindle.

Question 13

Cytokine

Answer 13

Any of a group of small proteins secreted by a number of cell types including macrophages and helper T cells that regulate the function of other cells.

Question 14

organelles

Answer 14

the membrane-enclosed structures within eukaryotic cells.

Question 15

electron microscope (em0

Answer 15

focuses a beam of electrons through the specimen or into its surface

Question 16

t/f lemon juice with a pH of 2 has two times the concentration of H+ as tomato juice which has a pH of 4

Answer 16

false

Question 17

t/f the freshwater of lakes and rivers is hypotonic compared to the aqueous cytoplasm in cells of most freshwater organisms. based on this we would predict that water will tend to diffuse spontaneously from the cells of these organisms out into the external lake water at a faster rate than water will diffuse into these cells from the external water.

Answer 17

false

Question 18

the nitrogenous bases for nucleotides A and G are both classified as purines

Answer 18

True