Which of the following pathways of CO2 fixation is found in algae and green plants? a. the reverse citric acid cycle b. the 3-hydroxypropionate pathway c. the acetyl-CoA pathway d. the Calvin-Benson-Bassham pathway

D. the Calvin-Benson-Bassham pathway

Explanation:

The Calvin-Benson-Bassham pathway commonly called the C3 pathway is the sequential step of reactions taking place in the stroma of the chloroplast. The Calvin cycle was studied by the radioactive studies in the green alga by Melvin Calvin.

The Calvin cycle takes place in almost every photosynthetic organism from green algae to green plants. The Calvin cycle is important for the plants as it forms the glucose molecules by the fixation of the carbon from the atmosphere and thus is also known as the Carbon fixation cycle in plants.

Thus, Option-D is correct.

common management practices in dairy and poultry farming are: (i) proper shelter facilities and their regular cleaning. (ii) some basic hygienic conditions such as clean water, nutritious food, etc. (iii) animals are kept in spacious, airy, and ventilated place.

answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.