Download App

Organisms and Populations — BIOLOGY STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYOrganisms and Populations5 Marks
Question
Differentiate between:
  1. Predator and parasite.
  2. S-Shaped and J-Shaped growth curve.
✓

Answer

  1. Predator and parasite.
S. No.
Predator
Parasite
1.
It feeds on another organism called prey.
Itn feeds on another organism called host.
2.
Predator is larger and stronger than the prey.
Parasite is smaller and weaker than tbhe host.
3.
It kills the prey.
Parasite does not immediately kill the host though the latter may die of prolonged exploitation.
4.
Predator feeds on killed prey.
It feeds on living host.
5.
It feeds over the prey from outside.
Parasite may feed over the host from outside or inside.
  1. S-Shaped and J-Shaped growth curve.
S. No.
S-Shaped
J-Shaped
1.
 It comprises the lag phase, exponential phase and stationary phase.
 It comprises only two phases - lag phase and exponential phase.
2.
Population becomes stable with zero growth rate and the curve levels.
Population faces mass mortality, and the curve stops
3.
 It is observed by most species including humans.
It is observed in few organisms such as reindeer and annual plants.

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

Arun visited his grandfather's farm and noticed that one of the workers was introducing earthworms in the soil. He quickly rushed to his grandfather and asked him the reason. His grandfather explained him the advantages of earthworm in soil improvement.
  1. Why are earthworms also known as detritivores?
  2. Explain fragmentation.
  3. Name the steps in the process of decomposition.
  4. What values are shown by Arun?
→
Answer the following questions:
Give a schematic representation of spermatogenesis in humans.
→
Explain the difference between the forward strand and lagging strand of DNA.
→
Study the illustration given and answer the questions that follow:

Name and state the function of ‘c’.

→
Differentiate between microsporogenesis and megasporogenesis. Which type of cell division occurs during these events? Name the structures formed at the end of these two events.
→
Starting with the zygote, draw the diagrams of the different stages of embryo development in a dicot.
→
Draw a labelled diagram of an anther lobe at microspore mother cell stage. Mention the role of different wall layers of anther.
→
Compare the life style of people living in the urban areas with those of rural areas and briefly describe how the life style affects their health.
→
The following is the illustration of the sequence of ovarian events (a – i) in a human female.

Identify the figure that illustrates corpus luteum and name the pituitary hormone that influences its formation.

→
Write a detail notes on the conservation of biodiversity.
→