1) Why is the process of reproduction necessary
2) If the filament of Spirogyra is broken into fragments. What will you observe
3) Fungus, moss and fem reproduce by a common method of asexual reproduction Name the
method
+) A flower consists of different parts. Name these parts of a flower
5) Mention the mode of reproduction in the following plants
(a) Spirogyra
(b) Yeast
(c) Money plants
6) Pick the odd one out from the following on the basis of mode of reproduction and give reason
for it.
Sugarcane, Potato, Rice, Rose
7) Give one difference between unisexual and bisexual flower.
8) Write the male and female reproductive parts present on the flowers
9) Name two plants where vegetative reproduction takes place by roots
10) A yellow powdery substance is present in the anther which participates in reproduction
process. Name this substance.
11) In which part of flower does fertilisation occur?
Answers
Answer:
1)=Reproduction is important for the survival of all living things. Without a mechanism for reproduction, life would come to an end
2)=If the filament of Spirogyra are broken into fragments, then each fragment will develop into a new plant.
3)=The method of Asexual Reproduction by which fungus and Moss and Ferns reproduce is spore formation.
+)=flower consists of sepals, petals, stamens, and pistils. A stamen has two parts called the anther and the filament. A pistil has three parts called the stigma, style, and ovary
5)a}Spirogyra species can reproduce both
sexually and asexually. Asexual, or vegetative, reproduction occurs by simple fragmentation of the filaments. Sexual reproduction occurs by a process known as conjugation, in which cells of two filaments lying side by side are joined by outgrowths called conjugation tubes.
5)b}Yeasts reproduce asexually by a process called budding. A bud is formed on the outer surface of the parent cell as the nucleus divides.
5)c}Money plant - By asexual mode of reproduction (by vegetative propagation), money plant can be propagated by using a piece of its stem.
6)The odd one out is rice. As it reproduces by sexual reproduction. All the other three, i.e. sugarcane, potato and rose reproduce through vegetative propagation.
7)The main difference between unisexual and bisexual flowers is that unisexual flowers contain male and female reproductive organs in separate flowers whereas bisexual flowers contain both male and female reproductive organs in the same flower.
8)The "male" or pollen-bearing part is called the stamen, and is composed of the filament and the anther. The "female" or seed-bearing part is called the pistil, and is composed of the ovary, the stigma, and the style. A flower may have exclusively male parts, exclusively female parts, or commonly, both.
9)Many different types of roots exhibit vegetative reproduction. The corm is used by gladiolus and garlic. Bulbs, such as a scaly bulb in lilies and a tunicate bulb in daffodils, are other common examples of this type of reproduction. A potato is a stem tuber, while parsnip propagates from a taproot.
10)That yellow powder is called pollen, and the stick that holds it is called a stamen. Flowers reproduce when bees or other pollinators carry pollen between flowers. The yellow powdery substance present on the anthers is pollen grains
11) The ovary is the part of the flower where fertilization takes place. The ovary is the female reproductive parts of the plant.
I hope this might help you