0

Guest

Courses New

What is the similarity between gymnosperms and angiosperms? A Phloem of both have companion cells. B Endosperm is formed before fertilization in both. C Origin of ovule and seed is similar in both. D Both have leaves, stem and roots.

What is the similarity between gymnosperms and angiosperms?

A

Phloem of both have companion cells.

B

Endosperm is formed before fertilization in both.

C

Origin of ovule and seed is similar in both.

D

Both have leaves, stem and roots.

 

Grade:12

1 Answers

Adarsh Pal
askIITians Faculty 159 Points
3 years ago
Companion cells are the thin-walled elongated cells which are the characteristic feature of phloem tissue in angiosperms. In gymnosperms and pteridophytes, phloem lacks companion cells.In gymnosperms, the endosperm is haploid (n) which is formed before fertilisation while in angiosperms, the endosperm is triploid (3n) which is formed after fertilisation. In angiosperms, one of the two male gametes which is haploid(n) fuses with the central cell in the ovule which is diploid(2n), to form primary endosperm nucleus which is triploid (3n) and forms triploid endosperm.In gymnosperms, ovule or megasporangium is present on the megasporophylls which aggregate together to form strobilus or cones. The ovule is naked and after fertilisation, the naked ovule develops into the seed and the seed coat is formed by the ovular integuments. While, in angiosperms, ovule is present inside the ovary present at the base of the pistil or carpel. Angiosperms do not have cones like gymnosperms, instead, they have flowers and the ovule is protected by the carpel which after fertilisation forms the seed. The similarity between angiosperms and gymnosperms is that both have leaves, stem and roots.So, the correct answer is D.

Think You Can Provide A Better Answer ?

Other Related Questions on 10 grade science

View all Questions »

ASK QUESTION

Get your questions answered by the expert for free

Answer and earn gift vouchers

Win Gift vouchers upto Rs 500/-

View courses by askIITians

Design classes One-on-One in your own way with Top IITians/Medical Professionals

Click Here Know More

Complete Self Study Package designed by Industry Leading Experts

Click Here Know More

Live 1-1 coding classes to unleash the Creator in your Child

Click Here Know More

a Complete All-in-One Study package Fully Loaded inside a Tablet!

Click Here Know More