Question:

Cycas have two cotyledons but not included in angiosperms becuase of

Updated On: Jun 23, 2024

Naked ovules
Seems like monocot
Circinate ptyxis
Compound leaves

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The Correct Option is A

Solution and Explanation

Cycas is a gymnosperm and not an angiosperm, primarily due to the presence of naked ovules. Therefore, the correct option is (A): Naked ovules In angiosperms (flowering plants), the ovules are enclosed within an ovary, which is a characteristic feature. Gymnosperms, including Cycas, have ovules that are not enclosed by an ovary, and this is one of the key distinctions between the two groups. The presence of two cotyledons in Cycas is a common feature of many gymnosperms, and it is not a distinguishing factor that separates them from angiosperms.

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LIST I Classes of world vegetation on the basis of temperature	LIST II Example
A	Megatherms	I	Alpine vegetation
B	Mesotherms	II	tropical rain forest
C	Microtherms	III	Coniferous forest
D	Hekistotherms	IV	Tropical deciduous forest

Questions Asked in NEET exam

Match List I with List II :

List - I		List – II
A.	Residual Volume	i.	Maximum volume of air that can be breathed in after forced expiration
B.	Vital Capacity	ii.	Volume of air inspired or expired during normal respiration
C.	Expiratory Capacity	iii.	Volume of air remaining in lungs after forcible expiration
D.	Tidal Volume	iv.	Total volume of air expired after normal inspiration

Choose the correct answer from the options given below :

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The respiratory system

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Match List I with List II:

List I		List II
A	Robert May	I	Species-Area relationship
B	Alexander von Humboldt	II	Long term ecosystem experiment using out door plots
C	Paul Ehrlich	III	Global species diversity at about 7 million
D	David Tilman	IV	Rivet popper hypothesis

Choose the correct answer from the options given below:

NEET (UG) - 2024
Species diversity

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Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : The potential (V) at any axial point, at 2 m distance(r) from the centre of the dipole of dipole moment vector \(\vec{P}\) of magnitude, 4 × 10^-6 C m, is ± 9 × 10³ V.
(Take \(\frac{1}{4\pi\epsilon_0}=9\times10^9\) SI units)
Reason R : \(V=±\frac{2P}{4\pi \epsilon_0r^2}\), where r is the distance of any axial point, situated at 2 m from the centre of the dipole.
In the light of the above statements, choose the correct answer from the options given below :
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- Magnetic Field
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Concepts Used:

Gymnosperms

Gymnosperms are flowerless plants that produce cones and seeds. It literally means "naked seed". They sit exposed on the surface of leaf-like structures called bracts. Gymnosperms are vascular plants of the subkingdom Embyophyta and include conifers, cycads, ginkgoes, and gnetophytes. They are abundant in temperate forest and boreal forest biomes with species that can tolerate moist or dry conditions.

Characteristics of Gymnosperms

They do not produce flowers.
Seeds are not formed inside a fruit.
They are found in colder regions where snowfall occurs.
They form cones with reproductive structures.
Xylem does not have vessels and the phloem and it has no companion cells and sieve tubes.

Column-I (Plant groups)		Column-II (Examples)
1.	Bryophyta	p.	Pinus
2.	Gymnosperm	q.	Adiantum
3.	Algae	r.	Sphagnum
4.	Pteridophyta	s.	Ectocarpus