Download App

Sexual Reproduction in Flowering Plants — BIOLOGY STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYSexual Reproduction in Flowering Plants2 Marks
Question
Define seed dormancy. Give the causes and significance of seed dormancy.
✓

Answer

The inability of seeds to germinate even if external conditions are favourable is called seed dormancy. Seed dormancy may be due to one or more of the following reasons:
  1. Hard and impermeable seed coats.
  2. Presence of certain inhibitory substances such as abscisic acid (ABA), coumarin etc.
Significance:
  1. It helps the seeds to tide over the unfavourable period.
  2. It enables the seeds to be disseminated safely and help them to germinate, when the environmental conditions are favourable.

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 "2 Marks Questions" from Sexual Reproduction in Flowering Plants→Sexual Reproduction in Flowering Plants — all question types→BIOLOGY STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

Name the effective biocontrol agents of several plant pathogens belonging to group of viruses. Also write about the ways they support the environment.
→
Give the name of the hormone which is secreted by corpus luteum.
→
Explain the function of each of the following:
Germ pores
→
Define self sustainability.
→
Give the full name of the following.
→
Give an account on cloning vectors.
→
Justify with the help of an example where a deliberate attempt by humans has led to the extinction of a particular species.
→
Why an immunosuppressive agent is taken after an organ transplant?
→
What are the problems associated with e-waste?
→
From which plant cannabiniods are obtained? Name any two cannabinoids. Which part of the body is effected by consuming these substances?
→