Step 1: Process of Photosynthesis
Photosynthesis is the process by which plants synthesize food from carbon dioxide and water, using energy from sunlight. This occurs in the chloroplasts of plant cells.
Step 2: Identifying the required components
- The necessary components for photosynthesis are:
- $\rightarrow$$\rightarrow$Carbon dioxide$\rightarrow$$\rightarrow$ (absorbed from the air),
- $\rightarrow$$\rightarrow$Water$\rightarrow$$\rightarrow$ (absorbed from the soil),
- $\rightarrow$$\rightarrow$Chloroplasts$\rightarrow$$\rightarrow$ (where photosynthesis occurs in plant cells),
- $\rightarrow$$\rightarrow$Sunlight$\rightarrow$$\rightarrow$ (provides the energy required for the process).
Step 3: Analyzing the options
- Option (A) includes oxygen and darkness, neither of which are required for photosynthesis. Oxygen is a byproduct, and sunlight is necessary, not darkness.
- Option (B) includes mitochondria, which are not involved in photosynthesis; they are involved in cellular respiration.
- Option (D) mentions nitrogen, which is not directly involved in photosynthesis.
Step 4: Conclusion
The correct answer is option (C), which lists all the essential components: carbon dioxide, water, chloroplasts, and sunlight.
\[
\boxed{\text{Carbon dioxide, Water, Chloroplast and Sunlight}}
\]
Find the unknown frequency if 24 is the median of the following frequency distribution:
\[\begin{array}{|c|c|c|c|c|c|} \hline \text{Class-interval} & 0-10 & 10-20 & 20-30 & 30-40 & 40-50 \\ \hline \text{Frequency} & 5 & 25 & 25 & \text{$p$} & 7 \\ \hline \end{array}\]
Two concentric circles are of radii $8\ \text{cm}$ and $5\ \text{cm}$. Find the length of the chord of the larger circle which touches (is tangent to) the smaller circle.