Pre Revision Test - Sexual Reproduction in Flowering PlantsContact Number: 9667591930 / 8527521718Pre Revision Test - Sexual Reproduction in Flowering PlantsContact Number: 9667591930 / 8527521718A typical angiosperm anther is dithecous which means that it is:
1. One lobed and the lobe has two theca
2. Two lobed and each lobe has two theca
3. Two lobed and each lobe has one theca
4. Four lobed and each lobe has two theca
Which of the following layers in the wall of an anther nourishes the developing pollen grains?
1. Tapetum
2. Epidermis
3. Endothecium
4. Middle layers
Pollen intine is made of:
1. Sporopollenin
2. Cellulose and pectin
3. Ergosterol
4. Phospholipids and cholesterol
Pollen grains lose their viability within 30 minutes of their release in:
1. Rose
2. Potato
3. Pea
4. Wheat
The pistil of Papaver is:
1. Monocarpellary
2. Multicarpellary apocarpous
3. Multicarpellary syncarpous
4. Absent
How many of the nuclei in the female gametophyte in angiosperms are surrounded by cell wall?
(1) 5
(2) 6
(3) 7
(4) 8
The only type of pollination that brings genetically different types of pollen grains to the stigma is:
(1) Chasmogamy
(2) Cleistogamy
(3) Geitonogamy
(4) Xenogamy
The aquatic plant in which pollination is not carried out by water is:
(1) Vallisneria
(2) Water lily
(3) Zostera
(4) Hydrilla
Dioecy in plants prevents:
(1) Autogamy but not geitonogamy
(2) Geitonogamy but not autogamy
(3) Both autogamy and geitonogamy
(4) Neither autogamy nor geitonogamy
If the female parent produces unisexual flower:
(1) Emasculation must be done before maturity
(2) Emasculation must be done after maturity
(3) Emasculation must be done before pollination
(4) Emasculation is not needed
The central cell in the embryo sac, after triple fusion, becomes:
(1) Primary endosperm cell
(2) Endosperm
(3) Embryo
(4) Zygote
The endosperm is completely consumed by the developing embryo in all of the following except:
1. Pea
2. Groundnut
3. Beans
4. Castor
Epicotyl has a shoot apex and a few leaf primordial enclosed in a hollow foliar structure called as the:
(1) Coleoptile
(2) Coleorhiza
(3) Scutellum
(4) Perisperm
The micropyle remains as a small pore in the seed coat. During germination, this facilitates entry of:
I. Oxygen
II. Water
(1) Only I
(2) Only II
(3) Both I and II
(4) Neither I nor II
Why do seeds need water to germinate?
(1) Following hydration, enzymes break down stored food and make it available for the embryo.
(2) Water provides energy.
(3) Water activates the chlorophyll molecules so that photosynthesis can begin.
(4) Water dissolves the minerals in the soil so that they become available to the seed.
Plants growing in harsh environments such as deserts, sand dunes, and arctic tundra often reproduce vegetatively. This is because
1. there are few animals available to pollinate them
2. they are members of plants families that only reproduce asexually
3. fruits would freeze or dry out in these environments
4. vegetative reproduction is not as risky as making seeds
Many plants have very long life spans because they have retained
1. the ability to photosynthesize
2. the ability to recycle water
3. meristem tissue
4. the ability to produce gametes
In the angiosperm life cycle, which of the following is not a member of the sporophyte generation
1. carpel
2. anther
3. pollen
4. ovary
Genetic self-incompatibility tends to increase
(1) pollen dispersal
(2) inbreeding
(3) pollination
(4) outcrossing
If a flower is to be pollinated by moths, it should
(1) be heavily scented
(2) be shaped like a tulip
(3) close about noon
(4) be brightly colored
Which of the following is not a major adaptation that has contributed to the enormous success of angiosperms over all other vascular plants?
1. Seeds
2. Flowers
3. Fruits
4. tracheids
The embryo of a grass seed is enclosed by two protective sheaths, a(n) _________, which covers the young shoot, and a(n) __________, which covers the young root.
1. plumule; radical
2. hypocotyl; picotyls
3. coleoptile; coleorrhiza
4. scutellum; replum
What is the first step in the germination of a seed?
1. pollination
2. fertilization
3. imbibition
4. hydrolysis of starch and other food reserves
The intine of the pollen grain is a:
1. Thick and discontinuous layer made of sporopollenin
2. Thick and continuous layer made of sporopollenin
3. Thin and discontinuous layer made of cellulose and pectin
4. Thin and continuous layer made of cellulose and pectin
In the monosporic embryo sac of a flowering plant, the number of nuclei that get surrounded by cell walls and thus are organized into cells is:
1. 5
2. 6
3. 7
4. 8
Female flowers remain submerged in water and the pollen grains are released inside the water in:
1. Sea grasses
2. Vallisneria
3. Water lily
4. Water hyacinth
Scientists are trying to transfer apomictic genes into hybrid varieties of several of our food and vegetable crops so that:
1. They get resistance against common pathogens
2. The yield of these plants can be increased many folds
3. Hybrid seeds need not be produced every year
4. Their germplasm is easily stored in labs for further research
What function as the embryonic root of the plant?
1. A
2. B
3. C
4. D
The following diagram shoes:
1. Multicarpellary, syncarpus pistil of Papaver
2. Multicarpellary, apocarpus pistil of Papaver
3. Multicarpellary, apocarpus gynoecium of Michelia
4. Multicarpellary, syncarpus gynoecium of Michelia
Which layer of the anther wall helps in its dehiscence?
1. A
2. B
3. C
4. D
Match each item in Column I with one item in Column II and chose your answer from the codes given below:
|
Column I |
Column II |
|
I. Banana |
1. Mesocarp and Endocarp |
Codes
I II III IV
(1) 1 2 3 4
(2) 2 1 4 3
(3) 2 1 3 4
(4) 1 2 4 3
Match each item in Column I with one item in Column II and chose your answer from the codes given below:
Column I Column II
(pollination) (example)
I. Anemophily 1. Zostera
II. Hydrophily 2. Maize
III. Ornithophily 3. Kigelia
IV. Chirepterophily 4. Butea monosperma
Codes:
I II III IV
1. 1 2 3 4
2. 2 1 4 3
3. 2 1 3 4
4. 1 2 4 3
A typical angiosperm anther is bilobed with each lobe having two theca i.e. dithecous. Theca is separated often by :
1. A longitudinal groove running lengthwise.
2. A longitudinal groove running breadth wise.
3. A transverse groove running breadth wise.
4. A transverse groove running lengthwise.
Four statements are given below. How many of them are correct?
(1) The anther is a tetragonal structure, with four microsporangia at corners, two in each lobe.
(2) Microsporangia develops further and becomes a pollen sacs.
(3) A typical microsporangia is surrounded by four layered wall, 3-protective and 1 nutritional.
(4) The nutritive layer is densely cytoplasmic with more than one nucleus
Options :
1. 3
2. 4
3. 2
4. 1
When anther is young a group of compactly arranged homogenous cells are present in centre it is known as :-
1. Sporogenous tissue
2. Potential pollen mother cell
3. Both 1. and 2.
4. Conjunctive tissue
Which of the following structure is not associated with protection and dehiscence of anther?
1. Tapetum
2. Epidermis
3. Endothecium
4. Middle layer
Which of the following statement is not correct for pollen grain?
1. It represents male gametophyte.
2. It is a spherical structure, about 25-50 micrometers in diameter.
3. Pollen grains are rich in nutrients.
4. In family rosaceae, leguminoseae and solanaceae pollen lose viability in 30 minute.
In which of the following plant there will be no seed set even after pollination?
1. Plant with monoecious flower.
2. Dioecious plant with staminate flowers.
3. Dioecious plant with pistillate flowers.
4. This statement is not true.
In biological world each organism has evolved its own mechanism of reproduction, which depends upon?
1. Habitat
2. Internal physiology
3. Size of organism
4. Both 1 and 2