The type of plant that has adapted to survive in very dry environments is called: MCQ with Answer and Explanation

Explanation:
Myosin is the motor protein forming thick filaments; its heads bind to actin thin filaments and generate force via the cross-bridge cycle. Actin forms thin filaments, troponin and tropomyosin regulate contraction. The sliding filament theory describes muscle shortening without filament length change.

Explanation:
In C4 plants, the leaves exhibit Kranz anatomy, where the vascular bundles are surrounded by a distinct layer of bundle sheath cells. These bundle sheath cells are large and contain numerous, large chloroplasts that lack grana (agranal). Because they lack grana, they cannot perform the light-dependent reactions (which require PSII, located in the grana) but are highly efficient at performing the Calvin cycle (light-independent reactions) in a high CO2 environment, minimizing photorespiration.

Explanation:
In C3 plants (e.g., wheat, rice), CO₂ is fixed by the enzyme RuBisCO, which catalyzes the reaction between CO₂ and RuBP, producing two molecules of 3-phosphoglycerate (3-PGA), a three-carbon compound. In C4 plants, the primary acceptor is PEP, leading to four-carbon OAA. C3 plants are the most common, but are less efficient in hot, dry conditions due to photorespiration.