VI. Identify the tissue:
a) Lining of small intestine
b) Connect muscle to bone
c) Iris of eye
d) Base of leaves
e) Leaf talk below epidermis
f) Vascular bundles
VII.ANSWER THE FOLLOEING:
1. How are cork formed?
2. Differentiate between different types of epithelium tissue in animal?
3. How do substance like CO2 and water move in and out of the cell? (3)
4. What is nucleus? Describe it parts and functions? (3)
5. Differentiate between plant and animal cells.
6. Why is the nucleus so significant in a cell?
7. Why are lysosomes known as “suicidal bags”?
8. What is the advantage of multicellularity over unicellularity?
9. What are the chromosomes made up of?
10. A cell placed in a solution swells up. What kind of solution is it? Why
does it happen?
Answers
Answer:
Vll answer
1 = Cork oak (Quercus suber) with sections of cork removed. Cork is obtained from the new outer sheath of bark formed by the inner bark after the original rough outer bark is removed
2= Epithelial tissue is present just below the basement membrane, while connective tissues are found all around the body, along with the nervous system, separating and supporting the various tissues and organs. Epithelial and connective tissues are among four of the major and vital kinds of animal tissues.
3 = The substances like CO2 and water move in and out of a cell by diffusion from the region of high concentration to low concentration. ... When the concentration outside the cell becomes low and it is high inside the cell, they moves out.
4 = The nucleus has very important roles to play. As it contains genetic material, it coordinates cell activities like protein synthesis and cell division. Anatomically the nucleus is made up of several components: nuclear envelope, nuclear lamina, nucleolus, chromosomes, nucleoplasm are some of these components.
5 = A plant cell contains a large, singular vacuole that is used for storage and maintaining the shape of the cell. In contrast, animal cells have many, smaller vacuoles. Plant cells have a cell wall, as well as a cell membrane. ... Animal cells simply have a cell membrane, but no cell wall.
6 = The nucleus is considered to be one of the most important structures of eukaryotic cells as it serves the function of information storage, retrieval and duplication of genetic information. It is a double membrane‐bound organelle that harbours the genetic material in the form of chromatin
7 = For example, when cell gets damaged, lysosome may burst and the enzymes digest their own cell. Therefore lysosomes are known as the Suicidal bags of a cell or we can say that they posses different kind of hydrolases on release of these enzymes that cause death of cell
8 = The advantage of multicellularity, when compared to unicellularity is that the life span of organisms is higher in the case of multicellular organisms since they have a large number of cells to maintain various functions than the unicellular organism.
9 = Chromosomes are thread-like structures located inside the nucleus of animal and plant cells. Each chromosome is made of protein and a single molecule of deoxyribonucleic acid (DNA). Passed from parents to offspring, DNA contains the specific instructions that make each type of living creature unique.