The type of joint between the teeth and the jawbone is:
A. Synovial joint
B. Suture
C. Cartilaginous joint
D. Fibrous joint (gomphosis)
Answer: Option D
Solution (By JKSSB Mock Tests)
A gomphosis is a specialized fibrous joint where a peg-like tooth fits into a socket in the jawbone, connected by the periodontal ligament. Sutures are between skull bones, synovial are movable, cartilaginous slightly movable.
Consider statements about human respiration: 1. Hemoglobin has a higher affinity for CO2 than O2. 2. Carbonic anhydrase is present in RBCs. 3. Most CO2 is transported as bicarbonate. Which are correct?
Explanation:
Hemoglobin has a much higher affinity for oxygen than for carbon dioxide; it binds O2 readily in the lungs. Inside RBCs, the enzyme carbonic anhydrase rapidly catalyzes the conversion of CO2 and water into carbonic acid. Approximately 70% of CO2 is transported in the blood as bicarbonate ions in the plasma. Thus, statements 2 and 3 are correct.
Explanation:
The 10% law of energy transfer, which states that only about 10% of the energy from one trophic level is transferred to the next, was proposed by Raymond Lindeman in 1942. This law explains why food chains typically have only 3-4 trophic levels; there is simply not enough energy available to support higher levels.
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