- Which of the given statements are incorrect for exponential
growth model?
(i) It has four phases - lag, log, deceleration and steady.
(ii) It occurs when the resources are abundant.
(iii) Population seldom grows beyond the carrying
capacity of ecosystem.
(iv) A stationary phase is achieved.
(a) (i), (iii) and (iv) (b) (ii) and (iii)
(c) (ii), (iii) and (iv) (d) (i), (ii) and (iv) - What is the growth equation for a population provided with
limited resources?
(a) dN
dt
=rN (b) dN
dtrN
KN
K=
⎛ −
⎝⎜⎞
⎠⎟
(c) dN
dtrNN
K=−
⎛
⎝⎜⎞
⎠⎟
1 (d)dN
dt=−rN 1- Read the statements and select the correct option.
(a) In endoparasites, respiration is often aerobic.
(b) The urn shaped age pyramid shows diminishing
population with negative growth.
(c) Immigration occurs when there is loss of some alleles
from the gene pool.
(d) Natality maintains health of the population.
23. Proline, useful in maintaining osmotic and water potential
is present in
(a) mesophytes (b) hygrophytes
(c) halophytes (d) xerophytes.
24. Select the incorrect plants of drought escapers.
(a) (XSKRUELD (b) 7ULEXOXV
(c) %RHUKDDYLD (d) $VSDUDJXV.
25. Identify the correct biome from the given features.
(i) Highly delicate and fragile biome
(ii) Takes long period to recover from a minor disturbance.
(iii) Plants possess xerophytic characters.
(iv) Shore and water birds visit the area during summer.
(a) Coniferous forest (b) Chapparal
(c) Tundra (d) Savannah
ANSWER KEY
- (b) 2. (d) 3. (c) 4. (c) 5. (d)
- (b) 7. (d) 8. (c) 9. (c) 10. (a)
- (d) 12. (a) 13. (a) 14. (b) 15. (b)
- (d) 17. (b) 18. (b) 19. (c) 20. (a)
(b) 22. (b) 23. (d) 24. (d) 25. (c)