Which of the following is an example of a monounsaturated fatty acid?
A. Linolenic acid
B. Stearic acid
C. Linoleic acid
D. Oleic acid
Answer: Option D
Solution (By JKExamLibrary)
Oleic acid is a monounsaturated fatty acid (one double bond), found in olive oil. Stearic acid is saturated, linoleic acid is polyunsaturated (two double bonds), linolenic acid is polyunsaturated (three double bonds). Unsaturated fats are generally liquid at room temperature and healthier for the heart. Oleic acid is an omega-9 fatty acid.
Explanation:
Cross: TT × Tt. Gametes: T (from TT) and T or t (from Tt). Offspring genotypes: TT and Tt. Both express the dominant phenotype because the recessive allele t is masked by T. No tt offspring are produced, so 0% show the recessive trait.
Explanation:
Syphilis is caused by the spirochete Treponema pallidum and is curable with antibiotics. Hepatitis B and HIV are viral, genital herpes is caused by herpes simplex virus. Gonorrhea and chlamydia are other bacterial STDs. Early diagnosis and treatment prevent serious complications like neurological damage and congenital syphilis.
Explanation:
The cohesion-tension theory (transpiration pull) is the primary mechanism for water ascent in tall trees. Transpiration creates negative pressure (tension) in leaves, water molecules cohere, and the column is pulled up. Root pressure and capillary action play minor roles. The cohesion of water is due to hydrogen bonds.
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