Question
Explain with the help of two examples, how certain plants have evolved morphological and chemical defenses against primary consumers such as cows and goats.
✓
Answer
- Thorns and spines are the most common morphological means of defence.
Example: spines of Acacia and cacti.
- Many plants produce and store chemicals, which when consumed by the herbivores make them sick, inhibit digestion, disrupt reproduction or even kill them.
Example: Calotropis produces highly poisonous cardiac glycosides.
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
Study the mRNA Segment given above which is complete to be translated into a polypeptide chain.
- Write the codons ‘a’ and ‘b.'
- What do they code for?
- How is peptide bond formed between two amino acids in the ribosome?
STDs are a threat to reproductive health. Describe any two such diseases and suggest preventive measures.
Write about the symptoms of Turner's syndrome.
What are biogeochemical cycles? Mention their two kinds, giving instances of each.
How many sperms will be produced from 50 primary spermatocytes?
Haemophilia and sickle-cell anaemia are blood related Mendelian disorders. Yet, they differ in their pattern of inheritance. Explain the difference.
Trace the life-cycle of malarial parasite in the human body when bitten by an infected female Anopheles.
What is pedigree analysis? Suggest how such an analysis, can be useful.
Enlist the probable causes of infertility.
The scientists belive that evolution is gradual. But extinction part of evolutionary story; are 'sudden' and 'abrupt' and also group specific comment whether a natural disaster can be the cause for extinction of species.