In the five-kingdom classification, which kingdom includes organisms that are eukaryotic, multicellular, and obtain nutrition by absorption? MCQ with Answer and Explanation
In the five-kingdom classification, which kingdom includes organisms that are eukaryotic, multicellular, and obtain nutrition by absorption?
A. Plantae
B. Protista
C. Fungi
D. Monera
Answer: Option C
Solution (By JKSSB Mock Tests)
Fungi are eukaryotic, mostly multicellular (except yeast), and are heterotrophic by absorption (saprophytic or parasitic). Their cell walls contain chitin. Monera are prokaryotic, Protista are unicellular eukaryotes, Plantae are autotrophic multicellular organisms. Fungi play key roles as decomposers in ecosystems.
Explanation:
A mid-cycle surge in luteinizing hormone (LH) triggers the final maturation and release of the secondary oocyte from the Graafian follicle (ovulation). FSH stimulates follicle growth, estrogen proliferates uterine lining, progesterone maintains it.
Explanation:
Cristae are the numerous infoldings of the inner mitochondrial membrane that increase surface area for oxidative phosphorylation and ATP synthesis. They contain ATP synthase complexes. Thylakoids are membrane structures in chloroplasts; grana are stacks of thylakoids. Cisternae are flattened membrane sacs of ER and Golgi. Cristae give the inner membrane its characteristic folded appearance.
Explanation:
The secondary oocyte is arrested in metaphase II of meiosis and is ovulated. Meiosis II is completed only when a sperm penetrates the oocyte, producing a mature ovum and a second polar body. If fertilization does not occur, the secondary oocyte degenerates. This ensures that the egg is only fully mature upon fertilization.
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