Survivorship Curves

Q. What is survivorship curve and how is it useful?

1. It is a plot of the age of organism against number of survivors in each age
2. The curve explains how many of the newborn will survive in each organism
3. It gives an idea if the organism follows K or R strategy of growth
4. It indicates the organism's ability to survive natural disasters

Q.

How do humans impact genetic diversity?

Q. Survivorship curve gives an accurate idea of an organism’s growth rate and growth rate strategy.

1. True
2. False

Q. Which of the following Population is most likely to go extinct

1. capable of absorbing water rapidly and retaining it
2. capable of minimizing water loss and facilitating aeration to underground parts
3. capable of reducing transpiration and able to store absorbed water
4. presence of well organized leaves that are adapted to absorb nitrogenous matter

Q.

Gemmules produced by sponges during unfavorable conditions help in:

1. Storing gametes

2. Continuation of species

3. Respiration

4. Storing food

Q. Every organism falls exactly into one of the three types of survival curves.

1. True
2. False

Q. Which of the following scenarios is an example of genetic drift?

1. An unusually cool spring causes a species of firefly to begin reproducing in July rather than the normal mating period of June
2. An earthquake kills 90% of all the long flashing fireflies in a population of long, medium, and short flashing fireflies.
3. A long-flashing firefly migrates from its original population to a new population comprised entirely of medium and short flashing fireflies.
4. Short flashing fireflies are more difficult to hunt and are eaten less often by predators than are medium and long flashing fireflies.

Q. Two populations of a species of pine tree are located on opposite sides of a mountain range. The two populations are genetically similar to each other.
An invasive beetle infestation kills 80% of the trees on the west side of the range. The beetle population does not spread to the eastern side of the range, and the east tree population does not experience any beetle related loss. After the infestation, the western tree population increases in size again.
What is the expected outcome of genetic testing comparing the two populations?

1. The genetic diversity of the west population is higher than the east population.
2. The phenotypic variation of the west population is higher than the east population.
3. The two populations are less genetically similar than they were prior to the beetle infestation.
4. The two populations remain genetically similar.

Q. Organisms following K-strategy show type I (convex) survival curve.

1. True
2. False

Q. Survivorship curve gives an accurate idea of an organism’s growth rate and growth rate strategy.

1. True
2. False

Q. Potential danger to population greatly reduced in number is :

1. Hardy-Weinberg disequilibrium
2. Tendency towards assortative mating
3. Loss of genetic variability
4. Reduced gene flow

Q.

how is the j shaped growth model different from the s shaped growth model?

Q. Which of the following Population is most likely to go extinct

1. A large population with lots of genetic variability.
2. A moderate-sized population of r strategists
3. A very small population in an unstable environment.
4. All would be equally likely to go extinct

Q. Survivorship curve gives an accurate idea of an organism’s growth rate and growth rate strategy.

1. True
2. False

Q. What is survivorship curve and how is it useful?

1. It is a plot of the age of organism against number of survivors in each age
2. The curve explains how many of the newborn will survive in each organism
3. It gives an idea if the organism follows K or R strategy of growth
4. It indicates the organism's ability to survive natural disasters