Bio Final chapter 10-13,16,30,33

Find both the number of cells and the percentage of the total represented by cell in tissues or organs not listed ("other"). The category includes cells from, among other organs, the intestine. Record the results in your table.

442 cells; 46%

39. Given this set of data, what is one valid conclusion the scientist could state?

As the temperature increases, the length of the cell cycle decreases

10. Which of the illustrations below best represents metaphase of mitosis?

B.

38. On the basis of the data in the table, how long would you expect the cell cycle to be at 5 C?

B. More than 54.6 hours

9. If a cell has 12 chromosomes, how many chromosomes will each of its daughter cells have after mitosis and cytokinesis? a. 4 b. 6 c. 12 d. 24

12

2.During which part of the cell cycle does cyclin production begin? How quickly is cyclin destroyed?

2.Interphase & destroyed w/in a few minutes

1. How long does cyclin production last during a typical cell cycle in fertilized clam eggs?

25 minutes

Why does C. elegans make an ideal model for studying cellular differentiation?

C. elegans has a limited number of cells in the adult organism and follows a rigid pattern of differentiation.

11. In plant cells, what forms midway between the divided nuclei during cytokinesis? a. Nuclear membrane b. Centromere c. Cell membrane d. Cell plate

Cell Plate

3.Suppose that the regulators that control cyclin production are no longer produced. What are two possible outcomes?

Cell will not enter mitosis of regulator that turns on cyclin production is no longer produces. The second one is a cell will not be able to enter interphase if a regulator that turns of cyclin production is no longer produced.

8. Sister chromatids are attached to each other at an area called the a. Centriole b. Spindle c. Centromere

Centromere

3. At the beginning of cell division, a chromosome consists of two a. Centromeres b. Centrioles c. Chromatids d. Spindles

Chromatids

2. In order for a cell to divide successfully, the cell must first a. Duplicate its genetic information b. Decrease its volume c. Increase its number of chromosomes d. Decrease its number of organelles

Duplicate its genetic information

4. What regulates the timing of the cell cycle in eukaryotes? a. Chromosomes b. Cyclins c. Nutrients d. DNA and RNA

Nutrients

27. Bone marrow cells that produce blood cells are best categorized as a. Embryonic stem cells b. Adult stem cells c. Pluripotent d. Totipotent cells

Pluripotent

3. The process that increases genetic diversity within a population is a. Asexual reproduction b. Sexual reproduction c. Cell division d. Binary fission

Sexual reproduction

9. The diagrams show that chromosomes move to the poles of the cell as the spindle fibers a. Shorten on the chromosome side of the mark b. Lengthen on the chromosome side of the mark c. Shorten on the centriole side of the mark d. Lengthen on the centriole side of the mark

Shorten on the chromosome side of the mark

surface area-to-volume ratio a. As the size of a cell increase, its volume decreases b. As the size of a cell decreases, its volume increases c. Larger cells will have a greater surface area-to-volume ratio d. Smaller cells will have a great surface area-to-volume ratio

Smaller cells will have a great surface area-to-volume ratio

22. In the cell cycle, external regulatory proteins direct cells to a. Speed up or slow down the cell cycle b. Remain unchanged c. Proceed and then stop the cell cycle d. Grow uncontrollably

Speed up or slow down the cell cycle

1. The rate at which materials enter and leave the cell depends on the cell's a. Volume b. Weight c. Speciation d. Surface area

Surface area

6. Alleles for the same traits are separated from each other during the process of

b. Meiosis I

21. A gene map shows

b. The relative locations of genes on a chromosome

9. The probability of flipping a coin twice and getting two heads is

c. 1/4

1.Different forms of a gene are called

c. Alleles

2. Organisms that have two identical alleles for a particular trait are said to be

c. Homozygous

4. Two pink-flowering plants are crossed. The offspring flower as follows: 25% red, 25% white, and 50% pink. What pattern of inheritance does flower color in these

c. Incomplete dominance

1. What happens to the chromosome number during meiosis?

c. It halves

8. The physical characteristics of an organism are called its

c. Phenotype

3. During which phase of meiosis is the chromosome number reduced?

c. Telophase I

7. Which of the following is NOT one of Gregor Mendel's principles?

d. Crossing-over occurs during meiosis

20. Unlike mitosis, meiosis in male mammals results in the formation of

d. Four haploid gametes

19. The illustration below represents what stage of meiosis?

d. Metaphase I

13. A situation in which a gene has more than two alleles is known as

d. Multiple alleles

5. Which of the following is used to construct a gene map?

d. Recombination rate

21. The timing in the cell cycle in eukaryotic cells is believed to be controlled by a group of closely related proteins known as a. Chromatids b. Cyclins c. Centromeres d. Centrioles

Cyclins

Calculate the percentage of the total cell number represented by each tissue or organ listed by using this formula Number of cells un adult x 100 Total number of cells

Gonad is 15%; Mesoderm muscle is 8%; Pharynx is 8%

8. This experiment tests a hypothesis about a. How chromosomes migrate during cell division b. How fluorescent dyes work in the cell c. The effect of lasers on cells d. Why cells divide

How chromosomes migrate during cell division

1. Which of the following is NOT an advantage of asexual reproduction? a. Simple and efficient b. Produces a large amount of offspring quickly c. Increases genetic diversity d. Requires one parent

Increases genetic diversity Requires one parent

7. A cell enters anaphase before all of its chromosomes have attached to the spindle. This may indicate that the cell is not responding to a. Internal regulators b. Mitosis c. Growth factors d. Apoptosis

Internal regulators

5. The period between cell divisions is called a. Interphase b. Prophase c. G3 phase d. Cytokinesis

Interphase

28. Which type of cell has the potential to develop into any type of cell a. Totipotent b. Pluripotent c. Multipotent d. Differentiated

Totipotent

6. Which of the following is TRUE about totipotent cells? a. Embryonic stem cells are totipotent cells b. Totipotent cells are differentiated cells c. Totipotent cells can differentiate into any type of cell and tissue d. Adult stem cells are totipotent cells

Totipotent cells can differentiate into any type of cell and tissue

10. A valid conclusion that can be drawn from this experiment is that the spindle fibers break down a. At the centrioles b. In the presence of dye c. When marked by lasers d. Where they are attached to chromosomes

Where they are attached to chromosomes

14. A pink-flowered Mirabilis plant (RW) is crossed with a white-flowered Mirabilis (WW). What is the chance that a seed from this cross will produce a red-flowered plant?

a. 0

2. Which ratio did Mendel find in his F2 generation?

a. 3:1

7. A Punnett square is used to determine the

a. Probable outcome of a cross