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Chapter 10 Questions
from chapter 10 assessment
Terms in this set (23)
The rate at which materials enter and leave the cell depends on the cell's
In order for a cell to divide successfully, the cell must first
Duplicate its genetic information
The process that increases genetic diversity within a population is
Describe each term: cell volume, cell surface area, ratio of surface area to volume
Cell volume- amount of cytoplasm inside a cell
Cell surface area- amount of cell membrane surrounding the cell
Describe asexual and sexual reproduction as survival strategies
Asexual- when you don't have changing climates
Sexual- when you have changing climates and want genetic diversity
In a changing environment, which organisms have an advantage- those that reproduce asexually or those that reproduce sexually? Explain
Sexually because in a changing environment people want genetic diversity
Sister chromatids are attached to each other at an area called the
If a cell has 12 chromosomes, how many chromosomes will each of its daughter cells have after mitosis and cytokinesis?
In plant cells, what forms midway between the divided nuclei during cytokinesis?
Describe how a eukaryotic cell's chromosomes change as a cell prepares to divide
The chromosomes are replicated in 'S' phase
What is the relationship between interphase and cell division?
Interphase is the first step, then it goes to mitosis/cytokinesis
How is the process of cell division in prokaryotes different from cell division in eukaryotes?
Asexual has 2 identical cells and sexual as 2 genetically different cells
Describe the differences between cell division in an animal cell and cell division in a plant cell
In animal cells the cell membrane is drawn inward until the cytoplasm is pinched into 2 equal parts. While in plant cells, instead of it pinching inward a cell plate forms inbetween the divided nuclei
The timing in the cell cycle in eukaryotic cells is believed to be controlled by a group of closely related proteins known as
In the cell cycle, external regulatory proteins direct cells to
Speed up or slow down the cycle
When some cells are removed from the center of a tissue culture, will new cells replace the cells that were removed? Explain
Yes, cells are constantly dividing and growing in mitosis
Describe the role of cyclins
It regulates the cell. Meaning that it 'tells' the cell when it's time to divide, duplicate their chromosomes, or enter another phase of the cell cycle
How do cancer cells differ from noncancerous cells?
Cancer cells do not respond to the signals that regulate the growth of most cells. As a result, the cells divide uncontrollably
Bone marrow cells that produce blood cells are best categorized as
Embryonic stem cells
Which type of cell has the potential to develop into any type of cell?
What is a blastocyst?
Stage of early development in mammals that consists of a hollow ball of cells
What's cell differentiation and how is it important to an organism's development?
It's the process by which cells become more specialized. Cells specialized in cell differentiation are needed for us to live because they carry out the jobs we need to perform to stay alive.
Describe 2 ways that technology may address the ethical concerns related to stem cell research
Some recent experiments have suggested that there may be ways to extract a small number of stem cells from any early embryo without damaging the embryo itself. Others have shown that it's possible to switch on a number of genes that reprogram adult cells to look and function like pluripotent embryonic stem cells
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