Question

G. High Order Thinking Skills (HOTS)
1. Why do cells without a nucleus are called dead cells?
2. If there is a throat infection, doctor prescribes antibiotics. Find out what are antibiotics?
How do they cure you?
11. Research based Activities/Projects
1. Find out, which bacteria is present in curd? How do they multiply? Search on internet,
how much time does it take for one bacteria to multiply into two and in about
12 hours, how many bacteria can be formed from a single bacterium?
2. Prepare an onion peel slide and add a drop of concentrated salt solution. Observe
what happens to the cells. Now add a drop of water and study what happens to
plant cells?
ANSWERS
4. (a)
4. (b)
5. (C)
5. (d)
2. T
Yourself - 1; 1. Cell wall 2. Organelles 3. Unicellular
4. Nucleus
Yourself - 2: 1. (d)
2. (b)
3. (e)
1. (b)
2. (d)
3. (c)
1. F
3. F.
4. F 5. T
1. Nucleus
2. Cell
3. Plant cell 4. Genes
5. Nucleus
1. Chloroplast 2. Nucleus
3. Chromosomes 4. Protoplasm
5. Cell membrane
(i) a. Plastid h Vacuol​

Answer 1

Answer:

Explanation:

G 1. They have the genetic material of the cell. It maintains the activities of the cell and also stabilizes the integrity of the genes. They support the cell in a wholesome manner and also regulate the molecular transport. Since the nucleus forms the epicenter of the cell, without them a cell is called as dead cell.

2.An antibiotic is a type of antimicrobial substance active against bacteria. It is the most important type of antibacterial agent for fighting bacterial infections They treat infections by killing or decreasing the growth of bacteria. The first modern-day antibiotic was used in 1936.

Answer 2

Answer:

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