Tag: life in water

Quizzes (6) Questions (112)

Questions Related to life in water

Multiple choice botany adaptation plant adaptation adaptation in plants plant habitat importance and classification of angiosperms aquatic plant adaptations pollination through water life in water

Raphides are formed of

  1. Calcium oxalate

  2. Calcium carbonate

  3. Sodium chloride

  4. Sodium carbonate
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Minerals crystals are found in plant cell walls in the form of calcium oxalate, carbonate or silica.
  • Calcium oxalate occurs in the form of a mass of crystals around a cellulosic core in few plants.
  • Calcium oxalate crystals occur in the form of needle-shaped in few plant cells and are called raphides.
  • Eg- Water hyacinth.
  • So, the correct answer is 'Calcium oxalate'.
Multiple choice botany adaptation plant adaptation adaptation in plants plant habitat importance and classification of angiosperms aquatic plant adaptations pollination through water life in water

Study of genetic composition of population in relation to habitat is called

  1. Genecology

  2. Genetics

  3. Eugenics

  4. Euthenics
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
a) Genecology is a branch of ecology which studies genetic variation of species compared to their population distribution in a particular environment.
b) Genetics is the branch of zoology which deals with the mechanism of heredity. It deals with transmission of hereditary characters from parents to offspring. 
c) Eugenics is the branch of science which deals with the selection of desired heritable characteristics in order to improve future generations.
d) Euthenics is the science of improving the internal well-being of the human by improving the external factor of their environment. 
So, the correct answer is 'Genecology'.
Multiple choice botany adaptation plant adaptation adaptation in plants plant habitat importance and classification of angiosperms aquatic plant adaptations pollination through water life in water

______ has glandular hair.

  1. <p>Calotropis</p>

  2. Tobacco

  3. Lemon

  4. <p>Yucca</p>
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

There are various defense mechanism seen in plants. These are thorns, spines, prickles, glandular hair, stinging hair, alkaloids, tannins, raphides, etc. Tobacco has glandular hair for its defense. Glandular hair with sticky substances protect it from outer agencies. Lemon has thorns to protect itself from its enemies. Yucca has pointed spines at the leaf ends to protect itself from enemies.
Calotropis is known as milkweeds because of the latex they produce. Thus, the correct answer is 'Tobacco.'

Multiple choice botany adaptation plant adaptation adaptation in plants plant habitat importance and classification of angiosperms aquatic plant adaptations pollination through water life in water

Dry scales of onion possess in their cells

  1. Raphides

  2. Prismatic crystals

  3. Sphaeraphides

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

A. Calcium oxalate crystals occur in the form of needle-shaped in few plant cells and are called raphides.

  • Eg- Water hyacinth.

B. Calcium oxalate in the form of rod-like or cubicle shaped in few plant cells and are called prismatic crystals.

  • Eg- dry scales of onions.

C. Calcium oxalate crystals occur in the form of star-shape in plant cells and are called sphaeraphides.

  • Eg- phylloclades of Colocasia.

D. Calcium oxalate is deposited in the leaves within the vacuoles during early developmental stages in plants is called crystal sand. Eg- Beet root

So, the correct answer is 'Prismatic crystals'.

Multiple choice botany adaptation plant adaptation adaptation in plants plant habitat importance and classification of angiosperms aquatic plant adaptations pollination through water life in water

Which one of the following plant species is NOT a sand binder in the semi arid region?

  1. Salvadora indica

  2. Calotropis procera

  3. Saccharum munja

  4. Saccharum spontaneum
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Salvadora indica is a halophyte or salt-tolerant shrub, not typically classified as a sand binder. Calotropis procera, Saccharum munja, and Saccharum spontaneum are well-known sand-binding plants used for soil stabilization in arid and semi-arid regions.

Multiple choice botany adaptation plant adaptation adaptation in plants plant habitat importance and classification of angiosperms aquatic plant adaptations pollination through water life in water

Which one of the following is an example of a plant adapted to highly saline coastal conditions?

  1. Sonneratia acida

  2. Anaardium occidentale

  3. Taxus baccata

  4. Gnetum gemon
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sonneratia acida is a mangrove species, which are plants specifically adapted to highly saline, waterlogged coastal environments. The other options are terrestrial plants not adapted to such conditions.

Multiple choice botany adaptation plant adaptation adaptation in plants plant habitat importance and classification of angiosperms aquatic plant adaptations pollination through water life in water

Which one of the following is the earliest land plant?

  1. Rhynia

  2. Homea

  3. Cordite's

  4. Cook Sonia
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Rhynia is a genus of extinct vascular plants from the Early Devonian period, representing some of the earliest land plants. It lacked true roots and leaves, consisting only of simple stems with vascular tissue. The other options appear to be garbled or misspelled names that don't represent early land plant groups.

Multiple choice botany adaptation plant adaptation adaptation in plants plant habitat importance and classification of angiosperms aquatic plant adaptations pollination through water life in water

Which of the following pairs of plant categories and habitat types are correctly matched?
a. Sociophytes- Shady
b. Heliophytes - Sunny
c. Psammophytes - Sandy
Select the correct answer using the codes given.

  1. $1, 2$ and $3$
  2. $1$ and $2$
  3. $1$ and $3$
  4. $2$ and $3$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sociophytes (shade-loving), Heliophytes (sun-loving), and Psammophytes (sand-loving) are all correctly matched with their respective habitat preferences.

Multiple choice botany adaptation plant adaptation adaptation in plants plant habitat importance and classification of angiosperms aquatic plant adaptations pollination through water life in water

Which one is concerned with the temporary adaptation ?

  1. Phytomelanin

  2. Melanin

  3. Tannin

  4. Anthocyanin
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Phytomelanin is a dark, carbon-rich pigment layer found in the pericarp of certain plants (like Asteraceae seeds), which serves as a temporary protective adaptation against environmental stress or predation. The other options are permanent biochemical components.

Multiple choice botany adaptation plant adaptation adaptation in plants plant habitat importance and classification of angiosperms aquatic plant adaptations pollination through water life in water

In which one of the following geological periods did the first land plants appear?

  1. Precambrian

  2. Permian

  3. Silurian

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

The first fossil evidence of land plants, such as vascular plants like Cooksonia, dates back to the Silurian period of the Paleozoic era.