1)
What is the purpose of DNA?
A)
manufactures proteins
B)
reduces activation energy
C)
stores hereditary information
D)
to aid in facilitated diffusion
2)
What process accounts for species diversity?
A)
mitosis
B)
meiosis
C)
predation
D)
symbiosis
3)
Which process results in two daughter cells each having the same number of chromosomes as the parent cell?
A)
meiosis
B)
mitosis
C)
cell cycle
D)
cytokinesis
4)
Plant and animal cells make exact copies through the process of
A)
mitosis.
B)
oxidation.
C)
segmentation.
D)
interactive replacement.
wevvdue
Plant and animal cells make exact copies through the process of
A) mitosis.
B) oxidation.
C) segmentation.
D) interactive replaceme
1) The purpose of DNA is to store hereditary information (C).
2) The process that accounts for species diversity is meiosis (B).
3) The process that results in two daughter cells each having the same number of chromosomes as the parent cell is mitosis (B).
4) Plant and animal cells make exact copies through the process of mitosis (A).
1) The purpose of DNA is to store hereditary information. This is the correct answer (C). To determine this, we can eliminate the other options:
- Option A: DNA does not directly manufacture proteins. Proteins are made by a process called protein synthesis, which involves the use of DNA to provide the instructions for building proteins, but DNA itself does not perform the actual manufacturing.
- Option B: DNA is not involved in reducing activation energy. Activation energy is a concept related to chemical reactions, while DNA's role is primarily in storing genetic information.
- Option D: DNA is not directly involved in aiding facilitated diffusion. Facilitated diffusion is a process by which certain molecules are transported across cell membranes, but DNA is not directly involved in this process.
Therefore, the correct answer is (C) stores hereditary information.
2) The process that accounts for species diversity is natural selection, which is not listed as one of the options. Here, we can use the process of elimination to find the closest answer:
- Option A: Mitosis is a process of cell division that results in two identical daughter cells. While mitosis plays a role in the growth and repair of an individual organism, it does not directly contribute to species diversity.
- Option B: Meiosis is a process of cell division that produces gametes (sex cells) with half the number of chromosomes as the parent cell. This is an important process for sexual reproduction and introduces genetic variation within a species, contributing to species diversity. However, meiosis alone does not account for species diversity.
- Option C: Predation is an ecological interaction where one organism captures and consumes another. While predation can influence population dynamics and potentially contribute to species diversity, it is not a process that accounts for species diversity itself.
- Option D: Symbiosis is a long-term interaction between two different species where both derive benefit. While symbiosis can promote coexistence and cooperation between species, it does not directly account for species diversity.
Therefore, none of the given options perfectly answer the question. However, if we had to choose the closest option, it would be (B) meiosis, as it contributes to genetic variation within a species.
3) The process that results in two daughter cells each having the same number of chromosomes as the parent cell is mitosis. This is the correct answer (B). To determine this, we can eliminate the other options:
- Option A: Meiosis is a process of cell division that results in gametes (sex cells) with half the number of chromosomes as the parent cell. It does not result in daughter cells with the same number of chromosomes.
- Option C: The cell cycle refers to the sequence of events that cells go through, including interphase, mitosis, and cytokinesis. While mitosis is a part of the cell cycle, it is specifically responsible for the division of the nucleus, not the entire cell.
- Option D: Cytokinesis is the process of cytoplasmic division that occurs after nuclear division (mitosis or meiosis). It is not responsible for ensuring that daughter cells have the same number of chromosomes.
Therefore, the correct answer is (B) mitosis.
4) Plant and animal cells make exact copies through the process of mitosis. This is the correct answer (A). To determine this, we can eliminate the other options:
- Option B: Oxidation is a chemical process involving a loss of electrons. It is not related to cell division or copying of cells.
- Option C: Segmentation refers to the division of a larger organism into segments or repeated parts. While certain organisms exhibit segmentation, it is not the process by which plant and animal cells make exact copies.
- Option D: Interactive replacement is not a recognized term or process related to cell division or copying of cells.
Therefore, the correct answer is (A) mitosis.