The disease caused by the fungus Histoplasma capsulatum is: MCQ with Answer and Explanation

The disease caused by the fungus Histoplasma capsulatum is:
A. Coccidioidomycosis
B. Histoplasmosis
C. Aspergillosis
D. Candidiasis
Answer: Option B
Solution (By JKSSB Mock Tests)
Histoplasmosis is a respiratory fungal infection caused by inhaling spores of Histoplasma capsulatum, often found in bird or bat droppings. It can be severe in immunocompromised.

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Practice More Biology Questions

Question #1
Which of the following is a connecting link between Annelida and Arthropoda?
A. Neopilina
B. Peripatus
C. Balanoglossus
D. Archaeopteryx

Correct Answer: Option B


Explanation:
Peripatus (velvet worm) is a classic connecting link between the phyla Annelida and Arthropoda. It possesses annelid-like features such as a soft body, segmental arrangement of nephridia, and circular muscles, alongside arthropod-like features such as tracheal respiration, an open circulatory system, and clawed legs. Balanoglossus links Hemichordata and Chordata, and Archaeopteryx links reptiles and birds.

This question belongs to: Science Biology
Question #2
Which process is used to make plants disease-free using meristem culture?
A. Cloning
B. Hybridization
C. Mutagenesis
D. Tissue culture

Correct Answer: Option D


Explanation:
Meristem culture, a type of tissue culture, involves excising the virus-free apical meristem (shoot tip) and growing it on a nutrient medium to produce a whole plant free of viruses. This is because meristematic cells lack vascular connections through which viruses spread. Cloning produces identical copies, hybridization crosses varieties, mutagenesis uses mutagens.

This question belongs to: Science Biology
Question #3
The type of inheritance in which the phenotype of the offspring is intermediate between the two parents is called:
A. Complete dominance
B. Codominance
C. Polygenic inheritance
D. Incomplete dominance

Correct Answer: Option D


Explanation:
Incomplete dominance occurs when neither allele is completely dominant, resulting in a heterozygous phenotype that is a blend (e.g., red × white snapdragons produce pink). Codominance shows both alleles fully expressed (e.g., AB blood type). Complete dominance shows one allele masking another. Polygenic inheritance involves multiple genes contributing to a continuous trait.

This question belongs to: Science Biology