Tag: classification of plants

Questions Related to classification of plants

Assertion:  The bacteria and other prokaryotes show high adaptability to the changing environment.

Reason:  Member of kingdom Monera are efficient in regulating gene expression

biology classification of plants monera five kingdoms of living organisms biodiversity and need of classification

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion

  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion

  3. If the assertion is true but the reason is false

  4. If both the assertion and reason are false

  5. If the assertion is false but reason is true

Show answer
Correct Option: A

The of life cycle of malarial parasite Plasmodium vivax, that occurs in female Anopheles is _______________.

biology classification of plants monera five kingdoms of living organisms biodiversity and need of classification

  1. Sexual cycle

  2. Pre-erythrocytic schizogony

  3. Exoerythrocytic schizogony

  4. Post-erythrocytic schizogony

Show answer
Correct Option: A
Explanation:

P. vivax is a causative agent of malaria. The life cycle of Plasmodium is characterized by an exogenous sexual phase (sporogony), in which multiplication occurs in female Anopheles mosquitos and an endogenous asexual phase (schizogony) which take place in the RBCs of the infected host. 

Thus, the correct answer is option A.

On what basis plasmids can be separated?

biology classification of plants monera five kingdoms of living organisms biodiversity and need of classification

  1. Their size

  2. Their charge

  3. Their A-T:G-C compositiion

  4. Both (A) and (B)

  5. All of the above

Show answer
Correct Option: D
Explanation:

Plasmid DNA can be analysed using agarose gel electrophoresis. When sample of DNA is loaded, onto the agarose gel and electric field is applied, it results in separation of DNA molecules according to their size and shape. On agarose gel, small molecules of DNA are able to pass easily in the electric field. DNA possesses strong negative charge which helps in its movement towards positive electrode in the electrophoresis apparatus. Along with size and shape of DNA molecule, electrophoresis buffer type also determines the rate of migration of DNA molecule.

Which of the following differentiates gram positive and gram negative bacteria?

biology classification of plants monera five kingdoms of living organisms biodiversity and need of classification

  1. A liposaccharide, outer covering with a small peptidoglycan component in the cell wall

  2. A small peptidoglycan, component covering a large liposaccharide base

  3. A large peptidoglycan, component in the cell wall

  4. A cell wall composed of liposaccharide and chitin

  5. A cell wall composed of chitin over peptidoglycan

Show answer
Correct Option: C
Explanation:

The gram-negative cell wall is characterized by presence of outer membrane, a thinner peptidoglycan layer and extensive periplasmic space surrounding the peptidoglycan. The uppermost layer of the outer membrane has lipopolysaccharide while the innermost layer is a typical lipid layer. Gram positive cells are characterized by presence of single thick layer of cell wall which is made up of peptidogycan, teichoic acid and lipoteichoic acid. They lack outer membrane and porin and have narrow periplasmic space. Correct answer is C.

Monocot root differs from dicot root in having

biology classification of plants importance and classification of angiosperms plant adaptation adaptation in plants

  1. No vascular bundles

  2. Well developed pith

  3. Radially arranged vascular bundles

  4. Open vascular bundles

Show answer
Correct Option: B
Explanation:

In dicot root, well developed pith is absent. In monocot root, well developed pith is present. In dicot roots, open vascular bundles are present which are radially arranged. 

Therefore, the correct answer is option B.

Plants whose seeds have more than one seed leaf (cotyledon) are 

biology classification of plants importance and classification of angiosperms plant adaptation adaptation in plants

  1. Ferns

  2. Dicots

  3. Monocots

  4. Moss

Show answer
Correct Option: B
Explanation:
On the basis of the number of cotyledons angiosperms are divided into monocots (having one cotyledon) and dicots (having 2 cotyledons). 
General characteristics of dicot.
  • They are two seeded plants.
  • The leaves of dicotyledons have veins in a network.
  • Dicotyledon seeds also contain an embryonic plant.
  • The flowers of dicotyledons have petals and other parts of the flower are arranged in four or five or six. It may contain flowers with four petals, flowers with five petals, flowers have six petals and the stamens also follow this pattern.
  • The seed is protected by a seed coat. For example, trees, sunflower, rose, etc.

Both a dicot root and monocot root possess six vascular bundles. The two can be distinguished by.

biology classification of plants importance and classification of angiosperms plant adaptation adaptation in plants

  1. Presence of lysigenous cavity in monocot root

  2. Occurrence of more metaxylem vessels in dicot root

  3. Presence of exarch condition in monocot root

  4. Outline of vessels

Show answer
Correct Option: D
Explanation:

Dicot root and monocot root differ on the activity of pericycle, a number of vascular bundles and the presence of medulla. In both dicot root and monocot root, six vascular bundles are present, they distinguished by thickness of cell walls or outlines of vessels.

So, the correct option is ‘Outlines of vessels’.

Monocot root differs from dicot root in having.

biology classification of plants importance and classification of angiosperms plant adaptation adaptation in plants

  1. Open vascular bundles

  2. Scattered vascular bundles

  3. Well developed pith

  4. Radially arranged vascular bundles

Show answer
Correct Option: C
Explanation:

Dicot root and monocot root differ on the activity of pericycle, the number of vascular bundles and the presence of medulla. In monocot root, the medulla is well developed, whereas, in dicot root, it is reduced, due to the extensions of xylem strands

So, the correct option is ‘Well developed pith’

The study of Fungi is called

botany classification of plants common diseases in humans epidemics transmission of diseases

  1. Phycology

  2. Plant pathology

  3. Systematics

  4. Mycology

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Correct Option: D
Explanation:

Fungi are a subsection of eukaryotes. Fungi are heterotrophs, which means they consume other organic products. Types of fungi include both molds and yeasts. Mycology is the branch of biology concerned with the study of fungi, including their genetic and biochemical properties, their taxonomy and their use to humans as a source for tinder, traditional medicine, food, and entheogens, as well as their dangers, such as toxicity or infection.

So, the correct answer is 'Mycology'

Heterothallism was discovered by

botany classification of plants common diseases in humans epidemics transmission of diseases

  1. Blakeslee

  2. Mehta

  3. Pasteur

  4. Alexopolous

Show answer
Correct Option: A
Explanation:

The term heterothallism was first used by Blakeslee in 1904 for the condition of sexual reproduction which he found in certain species of Mucorales, such that 'conjugation is possible only through the interaction of two differing thalli.

Therefore A is the correct option.