Download App

STD 12 - 1. sexual reproduction in flowering plants — BIOLOGY STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceBIOLOGYSTD 12 - 1. sexual reproduction in flowering plants1 Mark
MCQ
An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is
  • A
    cuticle
  • ✓
    sporopollenin
  • C
    lignin
  • D
    cellulose.
✓

Answer

Correct option: B.
sporopollenin
b
(b) : Sporopollenin is a major component of the tough outer (exine) walls of spores and pollen grains. It is chemically very stable and is usually well preserved in soils and sediments. It can withstand environmental extremes and cannot be degraded by enzymes and strong chemical reagents.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q [1M]" from STD 12 - 1. sexual reproduction in flowering plants→STD 12 - 1. sexual reproduction in flowering plants — all question types→BIOLOGY STD 12 Science question papers→Bihar Board STD 12 Science question papers→Bihar Board question paper generator→

Similar questions

Fig is pollinated by
→
Hepatitis-B vaccine is produced from
→
First human like hominid was :
→
Autopolyploidy can be induced artificially by :
→
BCG vaccine is a preventive measure against :
→
The major characteristics of the vegetation of a locality are controlled by
→
A tall true breeding garden pea plant is crossed with a dwarf true breeding garden pea plant. When the $F_1$ plants were selfed the resultinggenotypes were in the ratio of
→
Which one produce androgenic haploids in anther cultures?
→
Which of the following does not occur between 15 - 28 day of menstrual cycle?
→
Pollination is:
→