What is the full form of ICBN?

Which of the following organisms is a good indicator of pollution in an environment?

Which of the following shows no segregation of plant parts?

Which of the following is an incorrect statement?

What happens when stomata opens?

What is the function of adventitious roots?

Where do we find areolar tissue?

Which of the following scientists proposed the cell theory?

Which of the following is a fat?

Which is the correct sequence of mitotic cell division?

What is the name of long distance transport of materials in plants?

What is the minimum amount of an element in terms of mmole per kg?

In photo system I reaction, chlorophyll can be shown as having P700. What does P700 signify?

Which of the following is a product of lactic acid fermentation?

Which of the following hormones acts as growth inhibitor?

Which is the longest portion of the alimentary canal?

Which is the main organ of respiration in amphibians?

What is the percentage of eosinophils in a healthy human?

Which excretory organ is used by cockroaches?

What is sarcolemma?

During resting stage the axonal membrane is more permeable to which ion?

What is erythropoiesis?

Which organisms can sense and respond to their environment? How do humans sense their environment?

What are the characteristic features of Euglenoids?

What is the name of pigments present in Chlorophyceae?

State four characteristics of cyclostomata.

Tendrils of grapevine are homologous to tensrils of pumpkin, but analogous to those of pea.Justify the above statement

What is the function of root cap?

Which type of circulatory system is found in Pheretima?

What are the main structures within the cell nucleus?

Nucleotides are phosphorylated nucleosides. Justify.

While examining mitotic stage in a tissue. One finds some cells with 16 chromosomes and some with 32 chromosomes. What possible reasons could you assign to this difference in chromosome number? Do you think that cells with 16 chromosomes number could have arisen from cells with 32 chromosomes or vice-versa?

A palnt cell with 0.3% concentration of salt in its cell sap is placed in a solution with 3% concentration of salt.Answer the follwing
What changes are required to bring back the cell in normal condition?

Which of the following statements are true?If false, quantises correct them.It is very difficult to establish the essentially of macronutrients because they are required only quantities.

Dark reactions are dependent on light but yet are called dark reactions. Justify.

Define respiratory quotient and mention the value for the proteins and fats.

Fill in the blanks
Cytokinins are synthesised in areas where ........ is occurring

Name the part of the alimentary canal, where major absorption of digested food takes place.What are the absorbed forms of different kinds of food materials? 

List the factors affecting the binding of CO₂ and Hb.

Which coronary artery disease is caused due to narrowing of the lumen of arteries?

Indicate whether the following statements are true or false.
ADH helps in water elimination, making the urine hypotonic

What is aerobic muscle?

State the role of sodium-potassium pump in the maintenance of ionic gradients.

Give the name of the endocrine gland that produces calcitonin and also mention the role played by this hormone

Why reproduction is necessary? is it essential for survival? If a living organism does not reproduce, in which category it will belong, living or non-living? How is sexual reproduction different from asexual reproduction?

Why slime moulds are called fungus animals? Name some slime moulds

Flowers are not of ornamental value for plants, they serve a larger purpose. Discuss

Why molluscs are considered advanced over annelids?

Which structures form gynoecium? How is placenta related to gynoecium? What are its types?

Ginger grows under the ground, yet it is called a modified stem. What is the reason?

Mention the similarities between
Cardiac and smooth muscles

The diagram shows a section of cell membrane.Identify the components labelled A-F.

Observe the given figure related to enzyme action and answer the following questions.
(i) What is the figure showing?
(ii) Name the substances marked as (A) and (B).
(iii) What does the arrows marked (C) to (E) indicate?

With the help of diagrams, only depict the events that occur during prophase-I of meiotic division.

What is the significance of transpiration?

Mention the difference between passive and active salt absorption.

What is photorespiration?

There is no special respiratory organ in plants, yet plants efficiently manage exchange of gases. Justify.

On germination, a seed first produces shoots with leaves and flowers appear later.
How is this advantageous to the plant?

Indicate whether each of the following statements is true(T) or false(F).
The stomach has the lowest pH.

Explain the conducting part of the human respiratory system.

What are the basis behind reading of an electrocardiogram?

Give full form of ANF.Name the organ that secretes it.Under what condition of the body is it released?What is its role in regulating kidney function?

The following parts in our body has specific names in osteology. Write the name for each
(ii) Collar bone

Describe reflex action.

Name the T₃ and T₄ components of thyroid hormones. Explain their specification.

During biology class, the teacher was explaining the characteristics of living things. Abhay became confused after knowing, that all the characteristics of human beings are similar to other animals. He asked his teacher about any characteristics that is exclusively found only in human beings. The teacher smiled appreciated Abhay for his attentiveness and explained him about it.
(iii)  Why viruses are not considered as living ?

In the biology class, one of the students named Atul asked the importance of biological classification. The biology teacher explained their it was required by the taxonomists for the better understanding of living world in systematic and simplest manner.
(iii) What are the objectives of biological classification?

Vinay was going through an industrial are with his grandfather. While on the way, he felt suffocated and dizzy due to the smoke coming out of the factory.Vinay got angry and started shouting that all these factories should be closed. his grandfather calms him down and explained that it is due to large-scale cutting of trees for urbanization and industrialization which has disturbed the balance of atmospheric gases.He also explained the various economic importance of plants.
(iii) Give various economic importance of plants.

On biology practical day, teacher placed the slide for the spotting of a monocot root and gave the tets base d on the given slide and told the students to draw a TS of a monocot  and label the different structuresthey have observed in the slide.Archana at the same time failed to identify the all other internalk  structure found in the root except the endodermis.She got sad and asked her teacher to guide her after the test.
Where are casparian strips located?

Akash suffered from frequent weight loss, weakness, nausea, vomiting and diarrhoea. His father took him to the doctor who examined him and concluded thet he is suffereing from Addison disease, which is a hormonal disorder.
What valves are displayed by Aakash's father?

Lalit, an engineer in a mechanical field used to skip his meals and used to ear junk food in hurry.Few days back Lalit complained about the frequent chest pain to his friends.One of his friend advised him to immediately visit a doctor as this might have been related to some heart disorder.Lalit visited doctor who told him to go for an ECG(Electrocardiogram).Lalit asked the doctor about the utility of this test.
What does a human electrocardiogram indicate?

Akhil, a class XI student is very casual regarding his studies. One day, his classes were suppose to commence from 8:00 AM. But he left home at 7:45 AM. He started running on his way, but after 400-500 m, he felt a severe cramp in his leg. Due to this cramp , he had to stop and he missed his morning class.
Name the oxygen carrying pigment of muscles.

During a college tour; while travelling at a higher altitude of maintains, Vijay complains of dizziness and vomiting sensation. The guide took him to the doctor. The doctor after diagnosing him gave some medicines and explained that it happened due to the change In air pressure, as we go towards the higher altitude,
(i) What is the cause of Vijay's sickness?
(ii) Which of the sensory organ get disturbed during the journey?
(iii) Name the part of the ear that maintains the air pressure.
(iv) What values did the guide possess?

List the hormones secreted by the following:
(a) Hypothalamus
(b) Pituitary
(c) Thyroid
(d) Parathyroid
(e) Adrenal
(f) Pancreas
(g) Testis
(h) Ovary
(i) Thymus
(j) Atrium
(k) Kidney
(l) G-I Tract

What is the benefit of classification of living beings?

Classify viruses on the basis of host cell they infect

List out the similarities and differences in sexual reproduction between mosses and fern.

Give five distinguished features of Echinodermata.

Explain with suitable examples the different types of phyllotaxy.

Make a list of common fruits, their type and their edible parts.

List out the function of connective tissue

What are the different types of membranous structures found in bacteria cell? Discuss.

Give a detail explanation of structure of protein.

Explain the various stages of mitosis with the alignment of how chromosomes change their pattern from prophase to the end of the telophase.

On a trip of North-East region, Kirti saw some plants which have big leaves in order to trap organisms. Kirti was amazed and asked her teacher about the reason for absence of such plnts in other areas. Teacher replied that such plants grow on soil that is deficient in nitrogen and therefore, catch insects to fulfil their nitrogen requirments.
What is the role of nitrogen in plants?

Disscuss the uses of amides and how they are formed.

Draw well-labelled diagram of ultrastructure of chloroplast.

What is phosphorylation? Describe oxidative phosphorylation.

How various PGRs were discovered? Describe.

Describe human digestive system with a well-labelled diagram

Give an account of human respiratory tract with proper labelled diagrams.

Describe circulatory pathways in animals.

Describe how do the hormones help in osmoregulation in man?

Explain the structure of contractile protein in skeletal muscle.

During resting potential, the axonal membarance is polarised. Explain the movement of positive and negative ions leading to polarisation

Fill in the blanks
Hypothalamic hormones