Tag: plants in daily life

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Questions Related to plants in daily life

Multiple choice botany plants in daily life types of wood importance of plants secondary growth in stem
In temperate regions, during spring season, cambium is very active and produces a large number of xylary elements having vessels with wider cavities. Wood formed in this way is called as

  1. spring wood

  2. autumn wood

  3. early wood

  4. both (a) and (c)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Cambium activity is influenced by the climatic changes The cambium is more active during the spring that forms plenty of xylem vessels with wider cavities also called as earlywood or the spring wood. Springwood constitutes a major part of the annual ring and occurs at the beginning of an annual ring. It contains larger and wider elements and wood is lighter in color.

So, the correct option is 'both (a) and (c)'.

Multiple choice botany plants in daily life types of wood importance of plants secondary growth in stem
In temperate regions, cambium is less active during winter season and forms fewer xylary elements that have narrow vessels, this wood is called as

  1. spring wood

  2. autumn wood

  3. heartwood

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

Cambium activity is influenced by the climatic changes The cambium is more active during the spring that forms plenty of xylem vessels with wider cavities also called as early wood. In winter this activity slows down and gives rise to narrower xylem elements. This is the late wood or autumn wood. 

So, the correct answer is, 'autumn wood'.

Multiple choice botany plants in daily life types of wood importance of plants secondary growth in stem

Select the correct option:

Study carefully the following statements and select the incorrect one(s)
(i) Lateral roots develop from pericycle
(ii) Endodermis is the innermost layer of cortex
(iii) Sapwood is the central, dark coloured, non-conducting part of secondary xylem

  1. (i) and (ii)

  2. (ii) and (iii)

  3. (i) only

  4. (iii) only
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Some of the dividing pericycle cells are committed to the asymmetric, formative divisions that give rise to lateral root primordia and lateral root formation. The endodermis is the central, innermost layer of cortex in some land plants. It is made of compact living cells surrounded by an outer ring of endodermal cells with hydrophobic substances (Casparian Strip) to restrict the apoplastic flow of water to the inside. Sapwood is the soft outer layers of recently formed wood between the heartwood and the bark, containing the functioning vascular tissue and not central, dark colored, non-conducting part of secondary xylem.

So, the correct option is ' (iii) only'.

Multiple choice botany plants in daily life types of wood importance of plants secondary growth in stem

Early wood differs from latewood in

  1. Being produced in winter

  2. Presence of narrow vessels

  3. Being light in colour

  4. Possessing high density
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • In the spring season, cambium is very active and produces a large number of xylary elements having vessels with wider cavities and form spring or earlywood and has light colour with lower density while late or autumn wood is formed in winter and vessels are less in number with a narrow lumen which is dark in color with high density.

So the correct option is 'Being produced in winter'.

Multiple choice biology plants in daily life uses of angiosperms importance and classification of angiosperms classification of angiosperms importance of plants

The Botanical name of ''indian rai''

  1. Brassica campestris

  2. B. juncea

  3. B. nigra

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

Brassica juncea, commonly known as Indian Rye or Indian mustard is a species of a mustard plant. Brassica species flowers are complete, bisexual, i.e., with functional male (androecium) and female (gynoecium), including stamens, carpels and ovary. Pollination is entomophilous i.e., by insects, or cleistogamy i.e., by self or allogamy i.e., by cross-pollination. 

So, the correct answer is 'B.juncea'

Multiple choice biology plants in daily life uses of angiosperms importance and classification of angiosperms classification of angiosperms importance of plants

Jute fibre deteriorates quickly due to presence of

  1. High cellulose

  2. Low cellulose

  3. High lignin

  4. Low lignin
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Jute fiber is a lignocellulosic fiber. High lignin content makes the fiber more resistant to degradation, but in the context of commercial processing and quality, high lignin content is often associated with lower flexibility and faster deterioration under certain environmental conditions compared to pure cellulose fibers.

Multiple choice biology plants in daily life uses of angiosperms importance and classification of angiosperms classification of angiosperms importance of plants

The cotton thread fibres are

  1. Fibres taken out from stem

  2. Epidermal hairs of seeds

  3. Epidermal hairs of fruits

  4. Fibres taken out from roots
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Cotton fibers are single-celled, elongated structures that grow from the surface of the seeds of the cotton plant. They are botanically classified as epidermal hairs.

Multiple choice biology plants in daily life uses of angiosperms importance and classification of angiosperms classification of angiosperms importance of plants

Which of the following crop is most important for human

  1. Barley

  2. Wheat

  3. Cotton

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

Wheat is the most widely grown crop in the world and provides 20% of the daily protein and of the food calories for 4.5 billion people. It is the second most important food crop in the developing world after rice. The most planted crops throughout the world are wheat and maize (corn). 

So, the correct answer is 'Wheat'