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A group of organisms at any particular level in a classification system is called a _____.

In vitro fertilization is followed by________

Which purine base is found in RNA?

Identify the components depicted in the given image.

Choose the most appropriate explanation for ecological succession

Match the bones with the structure they are associated with

i. Occipital bone a. orbit of eye

ii. Sphenoid bone b. cheek bones

iii. Ethmoid bone c. foramen magnum cavity

iv. Zygomatic bone d. olfactory nerve

_____ is the secondary messenger utilized by ACTH, FSH, LH and calcitonin hormones.

How do you check for a viable pregnancy?

Which of the following is the propagule of ginger?

What will be the effect of mountain climbing on your RBCs?

The second commitment period of Kyoto Protocol was extended from

Match the following

$\begin{array}{cc}\text{Fruit}& \text{Edible part}\\ \text{(a) Apple}& \text{(i) Mesocarp}\\ \text{(b) Tomato}& \text{(ii) Mesocarp, endocarp, seeds}\\ \text{(c) Banana}& \text{(iii) Epicarp, Mesocarp and endocarp}\\ \text{(d) Mango}& \text{(iv) Thalamus}\end{array}$

Collenchyma is seen only in herbaceous dicots. Why?

Match the following list of bacteria and their commercially important products:

Bacterium Product

(i) Aspergillus niger (a) Lactic acid

(ii) Acetobacter aceti (b) Butyric acid

(iii) Clostridium butylicum (c) Acetic acid

(iv) Lactobacillus (d) Citric acid

Which of the following cells secrete somatostatin hormone responsible for inhibiting insulin and glucagon?

Which phylum is the most abundant one among animals?

A taxon gets moved to the "Endangered" list from the _______ category.

In incidents of fire in closed areas, deaths are reported due to hypoxia even though the victims are not burnt. What is the reason for this?

Lumpectomy is

Histone proteins have a __ charge.

The maximum volume of air that can be released from the lungs by forceful expiration after deepest inspiration is called the ___.

In human, blood passes from the inferior vena cava to the diastolic right atrium of heart due to

A wall has two layers $A$ and $B$, each made of different material. Both the layers have the same thickness. The thermal conductivity for $A$ is twice that of $B$. Under steady state, the temperature difference across the whole wall is ${36}^{\circ }C$. Then the temperature difference across the layer $A$ is

__ united the knowledge of chromosomal segregation with Mendelian principles.

Which animal is capable of obtaining water by oxidation of lipid?

A simple pendulum of length $l$ having a bob of mass $m$ is suspended in a car that is travelling with a constant speed $v$ around a circular path of radius $R$. If the pendulum undergoes small oscillations about its equilibrium position, the frequency of its oscillation will be

Arrange the following plant materials in order of their imbibing capacity from high to low.

An individual affected by Turner’s syndrome would be a:

According to Oparin, which one of the following was not present in the primitive atmosphere of the earth :

Regarding the assertion and reason, select the correct option.

Assertion [A]: DNA replication is semiconservative in nature.

Reason [R]: One of the DNA strands is synthesised continuously, while the other is synthesised discontinuously.

Four healthy people in their twenties got involved in injuries resulting in damage and death of a few cells of the following. Which cells are least likely to be replaced by new cells?

In non-cyclic photophosphorylation

Micropropagation is commercially used for growing:

Cross pollination can induce

Identify the structure through which stomatal transpiration occurs.

Termination of the polypeptide chain is brought about by:

Primitive aquatic chlorophyllous unicellular plants are included in a group called _____.

Which type of teeth is used for cutting or shearing food?

What characterstics is shared by simple diffusion and facilitated diffusion?

PCR is required for

What amount of heat will be generated in a coil of resistance $R$ due to a charge $q$ passing through it if the current in the coil decreases to zero uniformly during a time interval $\Delta t$?

Sigmoid curve showing the three distinct phases of growth follows the sequence of