Tag: biology

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Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

Vessels and companian cells are found in

  1. Pteridophyte

  2. Gnetum

  3. Ephedra

  4. Angiosperm
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Angiosperms or flowering plants are those plants in which seeds are formed inside fruits and the sporophylls are organised into flowers. They are the most recently and highly evolved plants appeared on Earth about 130 million years ago. The plant body is differentiated into root, stem and leaves. At maturity the plants bear flowers, which produces fruits and seeds. The vascular tissues are arranged in the form of vascular bundles. Xylem contains vessels and phloem has sieve tubes and companion cells. 

Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

Botanical name of Amla is ______________.

  1. Ocimum sanctum

  2. Phyllanthus emblica

  3. Saraca indica

  4. Ficus bengalensis
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Characteristics of monocot :-
1) Roots are adventitious
2) Embryo has single cotyledon
3) Pollens have single pore
4) Secondary growth is absent
5) Flower has parts in multiples of three
6) Leaf veins are parallel
7) Seeds possess one cotyledon
8) Vascular bundles appear to scatter through the stem cross-section
Botanical name of Amla is Phyllanthus emblica.

Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

When we cut any of the gram seeds exactly at their centre transversely, we can find the parts separated in to two equal halves. By keeping this as a main feature, to which group of Plantae we can classify them in to?

  1. Angiospermic monocot

  2. Gymnosperm

  3. Angiospermic dicot

  4. Both A and C
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

An angiospermic dicot seeds has a protective seed around it. It is made up of 2 cotyledons. The outer seed coat is called testa and inner seed coat is called tegmen. It's embryonic axis has 3 parts, plumule, radicle and hypocotyl.

So, option C is the correct answer.

Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

Angiosperms have dominated the land flora primarily by their

  1. Power of adaptability to diverse habitats

  2. Nature of pollination

  3. Domestication by humans

  4. Large number of seeds
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Angiosperms dominate because they are highly adaptable to diverse environments, aided by efficient water transport (vessels), double fertilization, and fruit-protected seeds.

Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

Which series includes ranales, parietales and malvales?

  1. Calyciflorae

  2. Thalamiflorae

  3. Disciflorae

  4. Bicarpellatae

  5. Inferae
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In Bentham and Hooker's classification, the series Thalamiflorae includes orders like Ranales, Parietales, and Malvales, characterized by flowers with a convex thalamus.

Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

In prothallus of vascular crypogams, antherozoids and eggs mature at different times resulting in

  1. High degree of sterility

  2. Apomixis

  3. Prevention of self fertilisation

  4. No change in success rate of fertilization
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Dichogamy (maturing at different times) in the prothallus of vascular cryptogams prevents self-fertilization, thereby promoting cross-fertilization and genetic diversity.

Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

A plant with bulb, trimerous flowers, $6$ stamens in two whorls belongs to a specific class in Bentham and Hooker's classification. The number of natural orders present in that class is

  1. $165$
  2. $202$
  3. $3$
  4. $34$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The plant described (bulb, trimerous, 6 stamens) is a monocot (Liliaceae). In Bentham and Hooker's system, the class Monocotyledones contains 34 natural orders.

Multiple choice biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

Trimerous flowers occur in

  1. Monocots

  2. Dicots

  3. Gymnosperms

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Trimerous flowers are those that have floral parts in the count of three. These flowers are characteristic features of monocots. 

A. Monocots have trimerous florets.
B. Dicots either have tetramerous or pentamerous flowers. 

C. Gymnosperms do not have the flowers. They produce the naked seeds.
Hence, the correct answer is 'Monocots'