Download App

Organisms and Populations — BIOLOGY STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYOrganisms and Populations5 Marks
Question
  1. Name the two growth models that represent population growth and draw the respective growth curves they represent.
  2. State the basis for the difference in the shape of these curves.
  3. Which one of the curves represents the human population growth at present? Do you think such a curve is sustainable ? Give reason in support of your answer.
✓

Answer

  1. Exponential growth curve , logistics growth curve -

a - Exponential growth curve b - logistic growth curve.
  1. Exponential growth - food resources and space unlimited.
Logistic growth - food resources and space limited.
  1. Exponential growth.
Not sustainable, as resources are limited/carrying capacity.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "5 Marks Questions" from Organisms and Populations→Organisms and Populations — all question types→BIOLOGY STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

Explain the ovarian and uterine events that occur during a menstrual cycle in a human female, under the influence of Pituitary and Ovarian hormones respectively.
→
Unless the vector and source DNAs are cut, fragments separated and joined, the desired recombinant vector molecules cannot be created.
  1. How are the desired DNA sequences cut?
  2. Explain the technique used to separate the cut fragments.
  3. How are the resultant fragments joined to the vector molecule?
→
Explain the relationship of ribosomes, 1-RNA and m-RNA during the process of translation in Prokaryotes.
→
In one family, the four children each have a different blood group. Their mother has blood group A and their father has blood group B. Work out a cross to explain how it is possible.
→
Work out a monohybrid cross upto F, generation, between two pea plants and two Antirrhinum plants, both having contrasting traits with respect to colour of flower. Comment on the patterns of inheritance in the crosses carried above.
→
The density of a population in a habitat per unit area is measured in different units. Write the unit of measurement against the following:
a.
Bacteria
____________
b.
Banyan
____________
c.
Deer
____________
d.
Fish
____________
→
Draw a diagrammatic labelled sectional view of a seminiferous tubule of a human.
→
A person in your colony has recently been diagnosed with AIDS. People/residents in the colony want him to leave the colony for the fear of spread of AIDS.
  1. Write your view on the situation, giving reasons.
  2. List the possible preventive measures that you would suggest to the residents of your locality in a meeting organised by you so that they understand the situation.
  3. Write the symptoms and the causative agent of AIDS.
→
Name and describe the steps involved in the technique widely used in forensics that serves as the basis of paternity testing in case of disputes.
→
Enumerate the different measures for control and prevention of drug/ alcohol abuse among adolescent.
→