Respuesta :
Answer: The answers are:
1- C) S phase
2-A) Prophase, Metaphase, Anaphase, and Telophase.
3-A) A. They help separate the chromosomes.
4)C) A cell plate
Explanation:
1-during the S phase (Synthesis phase) of Interphase. Interphase is basically the daily life cycle of the cell. Cells spend most of their life in Interphase before Mitosis occurs
2-Mitosis consists of four basic phases: prophase, metaphase, anaphase, and telophase. These phases occur in strict sequential order
3 Spindle Fibers equally divide the chromosomes in a parental cell into two daughter cells
4-The cells of land plants, unlike animal cells, have a cell wall made of stiff sugars which surround their cell membranes.
Answer:
The correct answers are:
1. Option C - S phase
2. Option A - Prophase, Metaphase, Anaphase, and Telophase
3. Option A - They help separate the chromosomes.
4. Option C - A cell plate
Explanation:
1. Cell cycle is a series of events, which include interphase, mitosis, and cytokinesis. Interphase is distinguished into G1, G2, and S phases. During the S or synthesis phase of the cell cycle, DNA is replicated. The phase occurs between G1 and G2 phases.
Reasons for incorrect answers:
- Option A. G1 phase is an intermediate phase. In this phase, the cell prepares itself for DNA replication. The size of the cell grows and centrosomes undergo division.
- Option B. G2 phase is defined as the rapid growth period of the cell. The cell prepares itself to undergo mitosis. G2 phase occurs after the S phase of the cell cycle.
- Option D. M phase of mitosis is the process of the cell cycle, in which the parent cell is divided into two daughter cells. The M phase consists of prophase, anaphase, telophase, and metaphase.
2. Mitosis or M phase is the second stage of the cell cycle. It consists of four stages, prophase, metaphase, anaphase, and telophase. Prophase starts with the duplication of genetic material, which ends with telophase. In telophase, the duplicated material is separated.
Reasons for incorrect answers:
- Option A. The cell cycle is divided into interphase and mitosis. The interphase occurs before mitosis. It is divided into G1, S, and G2 phases.
- Option C. Interphase is the period of the cell cycle in which the cell grows and synthesizes DNA. The cell prepares itself to enter into mitosis.
3. Spindle fibers attaches to the chromosomes and separates equally into two daughter cells. The formation of spindle fibers occurs in the prophase of mitosis.
Reasons for incorrect answers;
- Option B. Nuclear membrane encloses the nucleus. The membrane plays a crucial role in molecular processes. The nuclear membrane breaks down in the prophase of mitosis.
- Option C. The duplication of DNA occurs in the S phase of the Interphase. The duplication of DNA occurs prior to the cell division.
- Option D. The chromosomes are attached by spindle fibers. The chromosomes are visible during the metaphase of mitosis. The chromosomes are aligned at the equator, where they can be seen easily.
4. Cell division in plants and animals differs by only one point. The cell division in plants is done by the formation of cell plates. Unlike plant cells, a cleavage furrow is formed in animal cells.
Reasons for incorrect answers:
- Option A. Centrioles are barrel-shaped structures, which function to organize the microtubules. The centrioles play role in maintaining a cell's skeletal system.
- Option B. Centromeres are the specialized sequence of DNA. The structure holds together the dyads or sister chromatids.
- Option D. The complex structure of DNA and proteins, which is present could inside the nucleus is known as chromatin. Chromatin is a highly condensed structure.
For Further Reference:
https://brainly.com/question/9360168?referrer=searchResults
