Correct the following statements and rewrite them in your notebook. (a) Stem absorbs water and minerals from the soil.(b) Leaves hold the plant upright.(c) Roots conduct water to the leaves.(d) The number of petals and stamens in a flower is always equal.(e) If the sepals of a flower are joined together, its petals are also joined together.(f) If the petals of a flower are joined together, then the pistil is joined to the petal.
Correct Answer:
(a) Roots absorb water and minerals from the soil.
(b) The stem holds the plant upright.
(c) Stem conducts water to the leaves.
(d) The number of petals and stamens in a flower may be equal or different in different plants .
(e) If the sepals of a flower are joined together, then its petals may or may not be joined together .
(f) If the petals of a flower are joined together, then the pistil is not necessarily joined to the petal.
Explanation:
A flower consists of four main parts: petals, carpels, sepals, and stamens.
Sepals are the leafy structures that encompass the flower bud. Petals have highlighting colors to attract insects for pollination. The androecium is a male reproductive structure that consists of stamens. It is comprised of filament and an anther which holds the pollen grains.
The gynoecium is a female reproductive structure that consists of carpels. It is consist of three structures such as style, ovary, and stigma. Pollen sticks on stigma and reaches the ovary through the way of style. The ovary consists of ovules that produce the seed.
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If two resistors of 25Ω and 15Ω are joined together in series and then placed in parallel with a 40Ω resistor, the effective resistance of the combination is:(a) 0.1Ω (b) 10Ω (c) 20Ω (d) 40Ω
Choose the most appropriate answer.1. A medium-sized plant with a hard, brown, thin stem describes aa. herb. b. shrub. c. tree. d. creeper.2. Which of these plants has a tap root?a. maize b. grass c. wheat d. pea3. Which of these plants stores food in their roots?a. pea b. onion c. carrot d. potato4. The tendril in a pea plant is a modifieda. stem. b. leaf. c. root. d. flower.5. The spines of a cactus plant are modifieda. stems. b. leaves. c. roots. d. flowers.6. In which plant does photosynthesis take place in the stem rather than in the leaves?a. Bougainvillea b. potato c. onion d. cactus7. Which of these is the male part of a flower?a. sepals b. petals c. stamens d. pistil8. Which part of the flower turns into a fruit?a. sepals b. anther c. Ovary d. stigma9. The reproductive organ of a flowering plant is thea. pollen grains. b. flower. c. pistil. d. stamen.10. Which part of a plant regulates its water content?a. root b. stem c. leaf d. flower
Which of the following is a growth movement and which is not ?(a) folding up of leaves of sensitive plant on touching with hand.(b) folding up of petals of dandelion flower when light fades.
There are three plants A, B and C. The flowers of plant A open their petals in bright light during the day but close them when it gets dark at night. On the other hand, the flowers of plant B open their petals at night but close them during the day when there is bright light. The leaves of plant C fold up and droop when touched with fingers or any other solid object.(a) Name the phenomenon shown by the flowers of (i) plant A, and (ii) plant B.(b) Name one flower each which behaves like the flower of (i) plant A, and (ii) plant B.(c) Name the phenomenon exhibited by the leaves of plant C.(d) Name a plant whose leaves behave like those of plant C.(e) Which plant/plants exhibit the phenomenon based on growth movements?
When the ovary turns into a fruit, the petals and sepals fall off, then is the fruit protected?
DIRECTIONS: Read the passage(s) given below and answer the questions that follow. Passage- The transfer of pollen from the another to the stigma of a flower is called pollination.If the pollen of a flower lands on the stigma of the same flower, or on the stigma of another flower of the same plant, it is called self-pollination. When the pollen of a flower lands on the stigma of another flower of a different plant of the same kind, it is called cross-pollination.In cross-pollination,(a) the pollen of a flower lands on the stigma of another flower of the same plant.(b) the pollen of a flower lands on the stigma of another flower of a different plant of the same kind.(c) both the above are correct.(d) none of these is correct.
Arteries and veins are joined by a network of
Which one of the following helps in the upward movement of water and dissolved minerals from the roots to the leaves through the stem?(a) transportation (b) translocation (c) tropic movement (d) transpiration
When an insect sits on the flower of a plant then some particles A present in the top of little stalks in the flower attach to its body hair. When this insect now sits on the flower of another similar plant, then particles A attached to the hair of insect are put on the top of a flask-shaped organ at the centre of flower. The particle A grows a long tube B from the top of flask-shaped organ through which C moves down and reaches the bottom part of flask-shaped organ. Here C fuses with the nucleus of D contained in structure E. The fusion of C and D forms new cell F which grows and develops into a seed of the plant.(a)What are particles A? What is the process of transferring A from one flower to another flower of similar plant by the insect known as? (b)What is the name of tube B? (c)What is C which moves down through the tube B? (d)Name D and E. (e)What is F?
Water and dissolved minerals get into the root hair of a plant by a process called A and enter the conducting tissue B. The process C helps the water and dissolved minerals to move up through the tissue B in roots and stem, and reach the leaves of a plant . In the leaves food is made by a process D. This food is then transported to all the parts of a plant through tissue E. The process of distributing food made in the leaves to all the parts of the plant is called F.(a)What are (i) A (ii) B (iii) C (iv) D (v) E, and (vi) F ?(b) Which tissue is made up of living cells : B or E ?(c) Which tissue, B or E, contains sieve tubes ?(d) Which tissue, B or E, contains tracheids ?
When the leaves of a sensitive plant are touched with a finger, they fold up and when light fades at dark, the petals of a dandelion flower close.(a) State one way in which the above two processes are similar.(b) State two ways in which the above two processes differ.
What are the parts of a flower?
Name two plants in which one has joined sepals and the other has separate sepals.
DIRECTIONS: Read the following three statements carefully and choose the correct option. (i) A flower that contain only male or female parts is called bisexual flowers. (ii) A flower that contain all four parts is known as incomplete flower. (iii) A flower which contains only male or female part is called complete flower.(a) Statements (i) and (iii) are incorrect but (ii) is correct.(b) Statements (i) and (ii) are incorrect but (iii) is correct.(c) All statements are correct.(d) All statements are incorrect.
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