Tuesday, March 28, 2017

Botany XII - Sexual Reproduction in Flowering Plants 07

Question : 1
Read the following four statements:
(a) In most plants, by the time of the fruit develops from the ovary, other floral parts degenerate
(b) Embryos of monocotyledons have a single cotyledon that is situated towards posterior side
(c) After fertilisation, ovary develops into fruit and ovules develop into seeds
(d) In orchids, each fruit contains thousands of tiny seeds
How many of the above statement(s) is/are wrong?
 
Options:

3
4
1

2
Solution :
(C)
Scutellum→ Lateral side
You scored 0 of 1
Question : 2
(skipped)
Residual, persistent, nucellus is found in the seeds of
 
Options:

Beet and coconut

Castor and barley

Sunflower and black pepper
Black pepper and beet
Solution :
(D)
Perispermic seeds
You scored 0 of 1
Question : 3
(skipped)
Mark the incorrect match.
 
Options:

True fruit – Mango

Parthenocarpic fruit – Banana
False fruit – Orange

Eucarpic fruit – Groundnut
Solution :
(C)
Orange → True fruit
You scored 0 of 1
Question : 4
(skipped)
Which of the following statement for monocot embryogeny is correct?
 
Options:

Holoblastic and endoscopic

Zygote divides vertically producing suspensor cell and embryonal cell

Exoscopic and meroblastic
Development of single celled suspensor
Solution :
(D)
Meroblastic, endoscopic
You scored 0 of 1
Question : 5
(skipped)
Which of the following features of mature seeds are crucial for storage of seeds which can be used as food throughout the year and also to raise crop in the next season?
 
Options:

Dormancy and high water content
Dehydration and dormancy

High metabolic activity and hydration

Hydration and low metabolic activity
Solution :
(B)
As the seed matures its water content is
reduced and seeds become relatively
dry.
You scored 0 of 1
Question : 6
(skipped)
Given below is the diagram of an embryo of grass. In which of the following all the three parts labelled as A, B and C are correctly identified?
                                  
Options:

(A) Scutellum, (B) Radicle, (C) Shoot apex
(A) Epiblast, (B) Coleorhiza, (C) Scutellum

(A) Epiblast, (B) Coleoptile, (C) Scutellum

(A) Scutellum, (B) Coleorhiza, (C) Epiblast
Solution :
(B)
Coleoptile is protective covering of
plumule and coleorhiza is protective
covering of radicle
You scored 0 of 1
Question : 7
(skipped)
In apple, cashew and strawberry plants
 
Options:

Sepals and ovary both contribute to fruit formation

Only thalamus contributes to fruit development
Ovary and thalamus both contribute to fruit development

Only ovary contributes to fruit formation
Solution :
(C)
False fruits (Pseudocarps)
You scored 0 of 1
Question : 8
(skipped)
Read the following statements carefully:
(a) Seeds have better adaptive strategies for dispersal to new habitats
(b) Parthenocarpy can be induced through the application of growth hormones
(c) Mustard and guava plants produce dry fruits
(d) Seed viability in Lupinus arcticus is 2000 years
Which two of the above statements are correct?
 
Options:

c & d

a & c

b & c
a & b
Solution :
(D)
Guava– Fleshy fruit
Mustard- Dry fruit
You scored 0 of 1
Question : 9
(skipped)
In sunflower, maize and coconut plants
 
Options:

Triple fusion is absent
Endosperm persists in the mature seeds

Endosperm is not formed in life cycle

Embryo development precedes endosperm development
Solution :
(B)
Albuminous seeds
You scored 0 of 1
Question : 10
(skipped)
Which of the following pairs is wrongly matched while the remaining three are correct?
 
Options:
Orobanche, Ficus     –   Parasitic species with tiny s
eeds

Coleorhiza               –   Undifferentiated sheath

0.1% TTC                –   Testing of seed viability

Gram                     –    Exalbuminous seed
Solution :
(A)
Ficus is not a parasitic plant.

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