Question
What is co-extinction? Explain with a suitable example?
✓
Answer
When a species becomes extinct, the plant and animal species associated with it in an obligatory way also become extinct. When a host fish species becomes extinct, its unique assemblage of parasites also meets the same fate. Another example is the case of a coevolved plant-pollinator mutualism where extinction of one invariably leads to the extinction of the other.
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
Name the two forms of reservoir of carbon that regulate the ecosystem carbon cycle.
How is aneuploidy different from polyploidy? Mention their causes.
Which layer of uterus undergoes cyclic changes during the menstrual cycle?
Tobacco smoking, chewing or snuffing is very injurious to health of humans. Justify.
The cytological observations made in a number of insects led to the development of the concept of genetic/ chromosomal basis of sex-determination mechanism. Honey bee is an interesting example to study the mechanism of sex-determination. Study the schematic cross between the male and the female honey bees given below and answer the questions that follow:
- Identify the cell divisions ‘A’ and ‘B’ that lead to gamete formation in female and male honey bees respectively.
- Name the process ‘C’ that leads to the development of male honey bee (drone).
Explain the Hardy-Weinberg equilibrium principle.
- What precaution(s) would you recommend to a patient requiring repeated blood transfusion?
- If the advise is not followed by the patient, there is an apprehension that the patient might contract a disease that would destroy the immune system of his/her body. Explain with the help of schematic diagram only how the immune system would get affected and destroyed.
- Describe the endosperm development in coconut.
- Why is tender coconut considered a healthy source of nutrition?
- How are pea seeds different from castor seeds with respect to endosperm?
Study the table showing the population interaction between species Z and Y respectively. Assign the appropriate +/- signs for A, B, D, E and respective interactions for C and F.
| Species 'Z' | Species 'Y' | Name of Interaction |
| A | B | Mutualism |
| - | - | C |
| D | E | Parasitism |
| + | O | F |
One of the codons on mRNA is AUG. Draw the structure of tRNA adaptor molecule for this codon. Explain the uniqueness of this tRNA.