Explore topic-wise InterviewSolutions in .

Respiration in insects is called direct because:

Which of the following does not show fragmentation?

Sieve tube cell is

Genetic constitution of gamete gets decided in ___.

Which of the following plants will not have transpiration?

The foetal ejection reflex in humans triggers

Plants show light saturation effect at _______ of full sunlight.

Select the correct statement about G1 phase:

Regarding assertion and reason, choose the correct option.

Assertion[A]: Excessive inbreeding leads to inbreeding depression

Reason[R]: Increased homozygosity leads to loss of heterozygosity

Match the following columns and choose the correct option.

$\begin{array}{cc}ColumnI& ColumnII\\ \text{(a) Mutation breeding}& \text{1. Laborious and expensive}\\ & \text{process to obtain gene}\\ & \text{variation}\\ \text{(b) Selection}& \text{2. Hybrid vigour can be}\\ & \text{maintained for several}\\ & \text{generations}\\ \text{(c) Hybridisation}& \text{3. Planting a plant in a new locality from its native place}\\ & \\ \text{(d) Introduction}& \text{4. Oldest breeding method}\\ & \text{5. Quick method to obtain gene variation}\end{array}$

Mammary glands are stimulated by

Match the Following:

Match the evolutionary concepts listed under column I with the names of the scientists given under column II and select the right answer:

$\begin{array}{cccc}& ColumnI& & ColumnII\\ & Evolutionaryconcepts& & Namesofthescientists\\ A& Lawsofheredity& p& Wallace\\ B& Synthetictheory& q& Mendel\\ C& Mutationtheory& r& J.B.S.Haldane\\ D& TheoryofNaturalSelection& s& HugodeVries\\ & & t& Darwin\end{array}$

Sarcomere is the smallest contractile unit in a muscle fibre which is limited by the area between

Which pigment is involved in photoperiodic change in plants?

What is the other name for ground meristem?

The exchange of gases between inhaled air and blood is referred as ___.

The given image contains labelled parts of the male reproductive system. Choose the option with the correct labelled part along with its respective function.

The most widely accepted theory for ascent of sap in trees is

The type of ecosystem with the highest mean plant productivity is

How does the membrane potential inside a neuron change during an action potential?

In gymnosperms the seeds are naked because they lack_____

In grassland ecosystem, the pyramid of biomass is

An element playing important role in nitrogen fixation is:

Pathogens that affect the yield of crops are

In total, how many of the following animals show oestrus cycle and menstrual cycle respectively?

Cow, Human, Gorilla, Tiger, Deer, Dog, Monkey, Rat and Sheep.

The structures that help grapevines hold onto a support are called -

The size of a standard herbarium sheet is

Parallel venation is found in:

Diagrams of certain underground modifications of stem are given below. Select the option that correctly identifies them.

Assertion: The phloem sap moves towards the sink.

Reason: The process of loading at the source produces a hypotonic condition in the phloem.

In the following question, a statement of assertion is followed by a statement of reason. Mark the correct choice as:

Assertion: Translocation of sugar from source (leaf) to sink is defined as pressure flow hypothesis

Reason: Translocation of the solute is facilitated through living phloem sieve tube cells.

Which of the following is not a component of a thin filament?

Regarding assertion and reason, choose the correct option_______.

Assertion [A]: Cold air causes vasodilation of blood vessels in the nasal cavity.

Reason [R]: Oxygen can be absorbed by widened blood vessels.

Which among the following is wrongly matched?

Regarding the assertion and reason; choose the correct option_____.

Assertion [A]: Prophase I of Meiosis I is the longest phase during the formation of gametes.

Reason [R]: It has five sub stages Leptotene, Zygotene, Pachytene, Diplotene and

Diakinesis; during which the number of chromosomes are doubled.

The entire collections of plants/seeds having all diverse alleles for all the genes of a crop is called:

Which is true for emasculation?

Compressed Natural Gas is

The golden age of dinosaurs/age of reptiles was:

Identify the set of substances which are not used in the preparation of nutrient culture medium.

Choose the correct statement from amongst the following:

A few unique features of mammals are listed here. Pick the incorrect one(s).

I. Body is covered with skin and hair which are thermoregulatory in function.

II. All mammals give birth to a fully developed infant after gestation.

III. Feeds the infant with milk from modified sweat glands.

IV. All mammals are not viviparous.

Reduced sperm count of semen is called as_________

In 4 ‘o’clock plants, the crossing of pure-bred red and white flowered parental stocks produced pink flowered plants. This type of genotypic expression is called ___.