Biology · Environmental Studies

Forestry and Plant Sciences

1,005 Questions

Review important biological concepts with these questions on forestry and plant sciences. The topics include non-timber forest products, timber wood types, lichen growth, and tree structures. This content is ideal for students preparing for agriculture and biology exams.

Industrial wood productionLichen growth patternsNon-timber forest productsPapilionaceous timber woodsTree crown typesFast growing trees

Forestry and Plant Sciences Questions

Multiple choice

Which of the following trees is known as “axe-breaker”?

  1. Yerba Mate

  2. Quebaracho

  3. Wattle trees

  4. Parana pine
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Quebracho (Schinopsis lorentzii) is a tree native to South America, known for its extremely hard wood, earning it the name 'axe-breaker' (quebrar 'to break' + hacha 'axe').

Multiple choice

Which of the following trees is in danger of over-exploitation because a chemical compound called ‘taxol’ is extracted from the bark, needles, twigs and roots of this tree and is the biggest selling anti-cancer drug?

  1. Wild mahua

  2. Teak

  3. Chir pine

  4. Himalayan oak

  5. Himalayan yew
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

This is the correct answer. A chemical compound called ‘taxol’ is extracted from the bark, needles, twigs and roots of this tree, and it has been successfully used to treat some cancers – the drug is now the biggest selling anti-cancer drug in the world.

Multiple choice

In enrichment plantation, a single commercially valuable species is extensively planted and other species are eliminated. Which of the following species was responsible for replacing the Himalayan oak and Rhododendron forests?

  1. Teak

  2. Sandalwood

  3. Chir pine

  4. Shisham

  5. Sal
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is the correct answer. Chir Pine (Pinus roxburghii) plantations in the Himalayas have replaced the Himalayan oak (Quercius spp.) and Rhododendron forests.

Multiple choice

The age of a tree can be determined by

  1. measuring its height

  2. measuring its diameter

  3. analyzing its sap

  4. counting the annual growth rings of its stem
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Dendrochronology is the scientific method of dating tree rings to the year they were formed, which allows for the determination of the tree's age.

Multiple choice

Which of the following statements is incorrect?

  1. The planted trees in reforestation should generally be of the same species that were found in that forest.

  2. At least half the number of trees that are cut, should be planted.

  3. Reforestation can take place naturally also.

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The planted trees in reforestation should generally be of the same species that were found in that forest and at least equal to the number of trees that are cut. Reforestation can take place naturally also.

Multiple choice

Why are forests considered as green lungs in nature?

  1. Because they are green in colour

  2. Because they provide oxygen to animals

  3. Because they purify the air by destroying harmful microbes

  4. Because they absorb toxic chemicals in the atmosphere
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Forests are considered as green lungs in nature because they provide oxygen to aerobic animals and also purify the air by adding oxygen and absorbing carbon dioxide from it.

Multiple choice

What is the main factor in the growth of a small plant into a tree?

  1. Increase in cell size

  2. Increase in cell number

  3. Increase in cell diameter

  4. Increase in cell height
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The growth of a multicellular organism from a small plant to a tree is primarily driven by cell division (mitosis), which increases the total number of cells in the organism.