Which of the following is a characteristic of fungi?
A. Presence of chloroplasts
B. Cell wall of cellulose
C. Heterotrophic nutrition with chitinous cell wall
D. Autotrophic nutrition
Answer: Option C
Solution (By JKExamLibrary)
Fungi are eukaryotic, heterotrophic (saprophytic or parasitic), with cell walls containing chitin and glucans, not cellulose. They lack chloroplasts and are non-photosynthetic. Examples: yeasts, molds, mushrooms. They store food as glycogen. Reproduction can be asexual or sexual. Fungi play a key role as decomposers in ecosystems and are used in antibiotics production.
Explanation:
Trypsin is a pancreatic protease. Ptyalin is an amylase, pepsinogen requires HCl for activation, sucrase acts on sucrose, lactase on lactose.
Explanation:
In angiosperms, one sperm fertilizes the egg (zygote) and the other fuses with two polar nuclei (triploid endosperm). This double fertilization is unique.
Explanation:
Mature human RBCs have a lifespan of approximately 120 days, after which they are phagocytosed by macrophages in the spleen and liver. They lack nuclei and organelles, thus cannot repair themselves. New RBCs are produced in the bone marrow at a rate of about 2 million per second. Erythropoietin stimulates RBC production.
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