Amoeba multiplies by mitotic cell division. Is this phenomenon growth or reproduction? Explain.

1

(a)

In unicellular organisms like Amoeba, growth is synonyms with reproduction and takes place by increase in number of cells by mitotic cell division.

Define metabolism.

1

(a)

The sum total of all chemical reactions occurring in an organism due to specific interactions amongst different types of molecules within the cells, is called metabolism.

Carolus Linnaeus is considered as father of taxonomy. Name two other botanists known for their contribution to the  field of taxonomy.

1

(a)

George Bentham and Joseph Dalton Hooker.

Genus represents ______.

1

(a)

an individual plant or animal

(b)

a collection of plants or animals

(c)

a group of closely related species of plants or animals.

(d)

None of the above

How dikaryon formed in fungi?

1

(a)

Plasmogamy produces a dikaryotic cell or a cell with a pair of nuclei called dikaryon.

An association between roots of higher plants and fungi is called _____.

1

(a)

Mycorrhiza is a symbiotic association between a fungus and the root of a plant.

In the five-kingdom system of  Whittaker, how many kingdoms are eukaryotes?

1

(a)

In the five-kingdom classification system given by Whittaker, four kingdoms belong to eukaryotes, i.e., Protista, Fungi, Plantae, and Animalia. Only kingdom Monera belongs to prokaryotes.

Ther embryo sac of an angiosperm is made up of_______.

1

(a)

8 cells

(b)

7 cells and 8 nuclei

(c)

8 nuclei

(d)

7 cells and 7 nuclei

Body cavity is the cavity present between the body wall and gut wall. In some animals, the body cavity is not lined by mesoderm, Such animals are called ______.

1

(a)

Pseudocoelomates.

Add the missing floral organs of the given formula of Fabaceae,______.

1

(a)

Br \(\oplus \)\({ K }_{ (5) }{ C }_{ (1+2) }{ A }_{ (1+(9)) }{ G }_{ (1) }\)

What is the epidermal cell modification in plants which prevent water loss?

1

(a)

Cuticularised trichoblasts or epidermal hair which produce a stationary layer of air over the surface that reduces isolation and rate of transportation

Where the sclerities are present in cockroach?

1

(a)

IN the exoskeleton, spread all over the body of cockroach.

Write the name of any one amino acid, sugar nucleotide and fatty acid.

1

(a)

Alanine is an amino acid, adenylic acid is a nucleotide and linolenic acid is a fatty acid.

The diagram shows a bivalent at prophase-I of meiosis.Which of the four chromatids can cross over?

1

(a)

The non-sister chromatids of homologous pair of chromosomes undergo crossing over in pachytene stage of meiosis.

Give the name of the chemicals, which are released at the synapyic junction.

1

(a)

Neurotransmitters are the chemicals which are present at sybnaptic junctions.

Name the macronutrient which is component of all organic compounds, but is not obtained from soil.

1

(a)

Carbon.

Which range of wavelength(in nm) is called Photosynthetically Active Radiation (PAR)?

1

(a)

The light range between 400-700 nm of wavelength is called PAR.

Growth is one of the fundamental characteristics of all living organisms. Do unicellular organisms also grow? If so, what are the parameters?

1

(a)

Yes, unicellular organisms also grow. Their cell size increases up to a certainly fixed dimension only and then they divided. Their growth and reproduction are synchronised.

What do we call the type of teeth attachment in which each tooth is embedded in a socket of jaw bones?

1

(a)

The codont dentition.

Which components of the respiratory system help in generation of pressure gradient for breathing?

1

(a)

The diaphragm and a specialised set of muscles called external and internal intercostals present in between the ribs help in generation of pressure gradient for breathing.

What is the pH of urine?

1

(a)

It ranges from 4.5-8.2, average pH is 6.0

Label the different components of actinfilament in the diagram given below.

1

(a)

A-Troponin        
B-Tropomyosin

A patient complains of constant thirst excessive passing of urine and low blood pressure. When the doctor checked the patient's blood glucose and blood insulin level, the level were normal or slightly low The doctor diagnosed the conditions as diabetes insipidus. But he decides to measure on more hormone in patient's blood Which hormone does the doctor intend to measure?

1

(a)

Glucagon.

How does a gap junction facilitate intercellular communication?

1

(a)

A gap junction facilitates the cells to communicate with each other by connecting the cytoplasm of the adjacent cells.

Give the name of the cells/tissues in human body which
(i) exhibit amoeboid movement.
(ii) exhibit ciliary movement.

1

(a)

(i) Macrophages.
(ii) Ciliated epithelium of trachea.