Question
Write any two functions of leaves found in fern. Write any four differences between green algae and red algae.
✓
Answer
Fern leaves perform the function of reproduction along with photosynthesis.
Differences between Green Algae and Red Algae:
Differences between Green Algae and Red Algae:
| S. No | Green Algae | Red Algae |
| 1. | Chlorophyll a and b are found. | Chlorophyll a and d are found in them. |
| 2. | Other pigments B-carotene and carotenoids are found. | Phycovilin (phycocyanin and phycoerythrin) are found in these. |
| 3. | Stored food is in the form of starch. | Stored food is in the form of floridione starch. |
| 4. | They live in medium depth. | Whereas these algae live in very deep water. |
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of small muscle fibers. Each fiber comprises many tiny strands called fibrils.
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(a)Actin (b)Tropomyosin (c)Myosin (d)Calnexin
(2).Myofibrils show dark and light band in
(a) cardiac muscle
(b) Striped muscle
(c) cardiac muscle and unstriated muscle
(d) cardiac muscle and striped muscle
(3). Unstriped muscle present in the
(a) Intestinal muscle (b) Leg muscle (c) Muscle of fore limb (d) Heart muscle
(4). Which of the following muscle gets into fatigue very early
(a) Skeletal muscle (b) Smooth muscle (c) Cardiac muscle (d) All the above
(5). The structural and functional unit of the striated muscle fibre is called
(a) Sarcolemma (b) Sarcomere (c) Sarcoplasm (d) Myofibril
organs to function. There are more than 600 muscles in the human body. A kind of
elastic tissue makes up each muscle, which consists of thousands, or tens of thousands,
of small muscle fibers. Each fiber comprises many tiny strands called fibrils.
Impulses from nerve cells control the contraction of each muscle fiber. A muscle’s
strength depends mainly on how many fibers are present.
(1). Major protein constituent of muscle fibre is
(a)Actin (b)Tropomyosin (c)Myosin (d)Calnexin
(2).Myofibrils show dark and light band in
(a) cardiac muscle
(b) Striped muscle
(c) cardiac muscle and unstriated muscle
(d) cardiac muscle and striped muscle
(3). Unstriped muscle present in the
(a) Intestinal muscle (b) Leg muscle (c) Muscle of fore limb (d) Heart muscle
(4). Which of the following muscle gets into fatigue very early
(a) Skeletal muscle (b) Smooth muscle (c) Cardiac muscle (d) All the above
(5). The structural and functional unit of the striated muscle fibre is called
(a) Sarcolemma (b) Sarcomere (c) Sarcoplasm (d) Myofibril
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