Ch-12 Questions 21 to 40

Chapter-12
Reproduction in Plants
Sr NO	Question.	Answer
21.	_______ is the point of attachment of the leaf at the node.	Axil.
22.	What are called vegetative buds?	There are buds in the axil (point of attachment of the leaf at the node) of leaves which develop into shoots. These buds are called vegetative buds.
23.	A Vegetative bud consists of a short _____ around which immature overlapping leaves are folded.	Stem.
24.	The vegetative buds can also give rise to _______.	New plants.
25.	Scars present on potato are also called "____" .	Eyes.
26.	How we can germinate a new potato?	Scars present on potato are also called "eyes". Cut a few pieces of a potato, each with an eye and bury them in the soil. Water the pieces regularly for a few days. Sprouts will germinate from the eye.
27.	Name another plant which sprout from scar or eyes on it?	Ginger.
28.	_________ (sprout leaf plant) has buds in the margins of leaves.	Bryophyllum.
29.	How Bryophyllum reproduce?	Bryophyllum (sprout leaf plant) has buds in the margins of leaves. If a leaf of this plant falls on a moist soil, each bud can give rise to a new plant.
30.	Give name of two plants which reproduce through its roots.	(a). Sweet Potato (b). Dahlia.
31.	Name a plant which when detached from main plant become an independent plant.	Cacti.
32.	What are advantages of Vegitative Propagation?	Plants take less time to grow and bear flowers and fruits earlier than those produced from seeds. The new plants are exact copies of the parent plant, as they are produced from a single parent.
33.	Plants produce seeds as a result of__________.	Sexual reproduction.
34.	The tiny organisms like _____ can be seen only under a microscope.	Yeast.
35.	Yeast multiply every few hours if sufficient _____ are made available to them.	Nutrients.
36.	The small bulb-like projection coming out from the yeast cell is called a ____.	Bud.
37.	How does yeast reproduce and multiply?	The small bulb-like projection coming out from the yeast cell is called a bud. The bud gradually grows and gets detached from the parent cell and forms a new yeast cell. The new yeast cell grows, matures and produces more yeast cells.
38.	When water and nutrients are available algae grow and multiply rapidly by _____.	Fragmentation.
39.	How does algae reproduce and multiply?	When water and nutrients are available algae grow and multiply rapidly by fragmentation. An alga breaks up into two or more fragments. These fragments or pieces grow into new individuals.
40.	Fungi on a bread piece grow from ____ which are present in the air.	Spores.