Question
For question 1-4, use this key:

Key-

  1. Ecology.
  2. Population.
  3. Community.
  4. Ecosystem.
  1. A community plus its physical environment.
  2. Study of the interactions of organisms with each other and with the physical environment.
  3. All populations that are found in a particular area.
  4. All members of the same species that inhabit a particular area.

Answer

1.
A community plus its physical environment.
d.
Ecosystem
2.
Study of the interactions of organisms with each other and with the physical environment.
a.
Ecology
3.
All populations that are found in a particular area.
c.
Community
4.
All members of the same species that inhabit a particular area.
b.
Population

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

Similar questions

  1. Explain with the help of Griffith’s experiment how the search for genetic material was conducted and what was the conclusion drawn?
  2. How did MacLeod, McCarty and Avery establish the biochemical nature of the so called ‘genetic material’ identified by Griffith in his experiment.
A bright student of class XI, under peer pressure started taking drugs. He started neglecting studies, misbehaving with parents and friends in school. The principal of school counselled him, but it had no effect. His parents took him to a rehabilitation center. After a few months, he came back recovered.
  1. What is drug abuse?
  2. Name some commonly abused drugs and their source.
  3. What should be the attitude of his parents after his return?
  4. What values did the principal reflect through his initiative?
i. What is the chemical name of smack? Why is the consumption of smack considered as an abuse?
ii. Name the source plant and one effect of the following drugs on the human body:
1. Marijuana
2. Cocaine
3. Morphine
Give an account of the methods used in sequencing the human genome.
Answer the following questions:
Name the hormones secreted and write their functions:
  1. By corpus luteum and placenta (any two) .
  2. During Follicular phase and parturition.
The zygote passes through several development stages till implantation. Describe each stage briefly with suitable diagrams.
Raj was a known sportsman in his school. While returning home he found some unknown miscreants beating a young fellow. He tried to drive them off, but by that time the fellow died of injury. The police arrested Raj and he was put on trial. The judge being convinced by Raj's plea, ordered for DNA fingerprinting reports.
  1. What is the basis of DNA fingerprinting?
  2. Explain the steps in DNA fingerprinting.
  3. Write the applications of DNA fingerprinting.
  4. Raj's fingerprints on the dead body were sufficient to convict him but the judge asked for authentic proof. What values can be observed by the judge?
List three strategies that a bisexual chasmogamous flower can evolve to prevent self pollination (autogamy).
Give three hypotheses for explaining why tropics show greatest level of species richness.
Draw a labelled diagram and describe the clover leaf pattern model of t-RNA.