Question 1 of 100
Plant Kingdom
Which of the following algae produce Carrageen?
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Year-wise Biology practice
NEET 2021 Biology PYQs
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100 questions in this collection · Page 1 of 10
Question 2 of 100
Plant Kingdom
Genera like Selaginella and Salvinia produce two
kinds of spores. Such plants are known as:
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Question 3 of 100
Plant Kingdom
Which of the following algae contains mannitol as
reserve food material?
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Question 4 of 100
Plant Kingdom
Gemmae are present in:
AI-generated explanation. Check against your textbook.
Explanation:
Gemmae are asexual reproductive bodies found in some liverworts. They develop in structures called gemmae cups and help in rapid, clonal propagation. This aligns with NCERT's description of liverworts using gemmae for reproduction.
🧠 Did You Know?
Gemmae are a common feature of many liverworts, not mosses or Pteridophytes, and are not a typical feature of gymnosperms.
💡 NCERT Memory Line:
“Gemmae cups are present in some liverworts for asexual reproduction.”
Question 5 of 100
Morphology Of Flowering Plants
Diadelphous stamens are found in:
AI-generated explanation. Check against your textbook.
Explanation:
Diadelphous stamens are two bundles of stamens usually seen in the Fabaceae family. In pea (Pisum sativum), the 10 stamens are arranged as 9 fused stamens forming a tube and 1 free stamen, i.e., they occur in two distinct groups. This arrangement is characteristic of many leguminous plants and is described in NCERT under floral morphology of dicot plants. Among the options, pea is the legume with diadelphous stamens, while China rose (Hibiscus) has many stamens united into a single column; citrus has numerous free stamens without two clear bundles. Thus, the correct choice is Pea (option 3).
🧠 Did You Know?
Diadelphous stamens form a specialized anther arrangement that aids pollen presentation in some legumes.
💡 NCERT Memory Line:
Diadelphous stamens are two bundles common in Fabaceae (peas), with 9 fused in one bundle and 1 free in the other.
Question 6 of 100
Anatomy Of Flowering Plants
Match List-I with List-II.
Choose the correct answer from the options given below:
| List-I | List-II |
|---|---|
| (A)Lenticels | (I)Phellogen |
| (B)Cork cambium | (II)Suberin deposition |
| (C)Secondary cortex | (III)Exchange of gases |
| (D)Cork | (IV)Phelloderm |
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Question 7 of 100
Anatomy Of Flowering Plants
Match List-I with List-II.
Choose the correct answer from the options given below:
| List-I | List-II |
|---|---|
| (A)Cells with active cell division capacity | (I)Vascular tissues |
| (B)Tissue having all cells similar in structure and function | (II)Meristematic tissue |
| (C)Tissue having different types of cells | (III)Sclereids |
| (D)Dead cells with highly thickened walls and narrow lumen | (IV)Simple Tissue |
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Question 8 of 100
Cell The Unit Of Life
Which of the following is an incorrect statement?
AI-generated explanation. Check against your textbook.
Explanation:
Option 1 is incorrect. Mature sieve tube elements lack a nucleus and have very few cytoplasmic organelles; they rely on companion cells for metabolic needs. This is described in NCERT in the discussion of phloem tissue.
🧠 Did You Know?
Companion cells support sieve tube elements and help with loading/unloading of substances in phloem.
💡 NCERT Memory Line:
Mature sieve tube elements are enucleate and devoid of usual organelles; their metabolic functions are supported by companion cells.
Question 9 of 100
Cell The Unit Of Life
Match List-I with List-II.
Choose the correct answer from the options given below:
| List-I | List-II |
|---|---|
| (A)Cristae | (I)Primary constriction in chromosome |
| (B)Thylakoids | (II)Disc-shaped sacs in Golgi apparatus |
| (C)Centromere | (III)Infoldings in mitochondria |
| (D)Cisternae | (IV)Flattened membranous sacs in stroma of plastids |
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Question 10 of 100
Cell The Unit Of Life
When the centromere is situated in the middle of
two equal arms of chromosomes, the chromosome
is referred as:
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