A characteristic property that distinguishes a malignant tumor from a benign tumor is:
Show Hint
- Metamorphosis
- Metastasis
- Metabolism
- Metagenesis
The Correct Option is B
Solution and Explanation
Top Questions on human health and disease
Read the following passage and answer the questions that follow. Prevention is the frontline response to drug use. Effective interventions address the underlying conditions contributing to drug use, such as a lack of connection to family or community, instability, insecurity, trauma, mental health issues, etc. When addressed, these factors can effectively prevent the initiation of drug use and the progression to drug use disorders. Study the few key figures of drug use given below and answer the questions that follow.
(a) What do you infer from the figures in Table No. 1 about the people with drug use disorders, 2022 (in million)? State any two of your observations.
(b) How are Hepatitis C and HIV related to drug use disorders by people, as shown in Table No. 2? State the correlation between the two.
(c)
- [(i)] Give the scientific name of (p) shown in Table No. 1.
OR - [(ii)] Give the scientific name of (q) shown in Table No. 1.
- CBSE CLASS XII - 2025
- Biology
- human health and disease
- [(i)] Give the scientific name of (p) shown in Table No. 1.
- Assertion (A): In humans, filariasis is characterized by inflammation in the lower limbs.
Reason (R): Filarial worm usually lives in the lymphatic vessels of the lower limbs.- CBSE CLASS XII - 2025
- Biology
- human health and disease
- Samples of blood and urine of a sportsperson are collected before any sports event for drug tests.
(a) Why there is a need to conduct such tests?
(b) Name the drugs the authorities usually look for.
(c) Write the generic names of two plants from which these drugs are obtained.
- CBSE CLASS XII - 2025
- Biology
- human health and disease
Immunity in our body is of two types: (i) Innate immunity and (ii) acquired immunity. Innate immunity is a non-specific defence mechanism, whereas acquired immunity is pathogen-specific; it is called specific immunity too. Acquired immunity is characterised by memory. Antibodies are specific to antigens and there are different types of antibodies produced in our body: they are IgA, IgE, IgG and IgM. It shows primary response when it encounters the pathogen for the first time and secondary response during the subsequent encounters with the same Antigen/Pathogen.
(a) Name the two types of specialised cells which carry out the primary and secondary immune response.
(b) Why is the antibody-mediated immunity also called as humoral immune response?
Attempt either sub-part (c) or (d):
(c) The organ transplants are often rejected if taken from suitable compatible persons.
(i) Mention the characteristic of our immune system that is responsible for the graft rejection.
(ii) Name the type of immune response and the cell involved in it.
OR
(d) How is active immunity different from passive immunity?- CBSE CLASS XII - 2025
- Biology
- human health and disease
Student to attempt either option (A) or (B).
(A) Describe any two situations where a medical doctor would recommend injection of pre-formed antibodies (antitoxins) into the body of a patient.
OR
(B) The symptoms of malaria do not appear immediately after the entry of sporozoites into the human body when bitten by female Anopheles mosquito. Explain why it happens.- CBSE CLASS XII - 2025
- Biology
- human health and disease
Questions Asked in CBSE CLASS XII exam
- Differentiate between positive externalities and negative externalities.
- CBSE CLASS XII - 2025
- Income and Employment
- "In a two-sector economy, National Income is always equal to Domestic income " Defend or refute the given statement with valid reasons.
- CBSE CLASS XII - 2025
- National Income Accounting
- As the Banker to the Bank, Reserve Bank of India performs all functions except ___.
- CBSE CLASS XII - 2025
- Money and Banking
- Define Nominal Gross Domestic Product. How is it different from Real Gross Domestic Product?
- CBSE CLASS XII - 2025
- National Income Accounting
- Define Real Gross Domestic Product. How is it different from Nominal Gross Domestic Product?
- CBSE CLASS XII - 2025
- National Income Accounting