Question
How do organisms cope with stressful external environmental conditions which are localised or of short duration?
✓
Answer
Migrate temporarily from the stressful habitat to a hospitable area/suspended activities/Form thick walled spores/Form dormant seeds/Hibernate during winter/Aestivate during summer/Planktons diapause.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
- Mention the exact location or the site in a flowering plant, where the following developments take place:
- Deposition of sporopollenin.
- Triple fusion.
- Release of male gametes.
- Megasporogenesis.
- Draw a labelled diagram of a male gametophyte of an angiosperm.
Identify the figure given and the part labelled “A”.
- Draw a labelled sketch of a mature 7-celled, 8-nucleate embryo-sac.
- Which one of the cell in an embryo-sac produce endosperm after double fertilisation?
Flowering plants have developed many devices to discourage self-pollination and to encourage cross-pollination. Explain three such devices.
Many plant and animal species are on the verge of their extinction because of loss of forest land by indiscriminate use by the humans. As a biology student what method would you suggest along with its advantages that can protect such threatened species from getting extinct?
- Sickel-cell anaemia in humans is a result of point mutation. Explain.
- Write the genotypes of both the parents who have produced a sickle-cell anaemic offspring.
Explain the ecological efficiency.
Where is an operator' located in a prokaryotic DNA? How does an operator regulate gene expression at transcription level in a prokaryote? Explain.
- Write your observations on the variations seen in the Darwin’s finches shown above.
- How did Darwin explain the existence of different varieties of finches on Galapagos Islands?
In the garden pea plant, the green color of pod is dominant over the yellow color of the pod to determine the genotype of a plant of unknown genotype, use punnett square to represent the genotype and phenotype of the test cross?