Question

for numbers 13 through 16, label the parts of the brown alga pictured. use the terms in the word bank to the right.
using the words in the word bank, fill in the blanks to the 2 processes pictured below. questions # 17 - 20.
plants & photosynthetic microbes carry out the process of photosynthesis for food. the equation for photosynthesis is pictured below.
$$(17.) + h_2o \to (18.) + o_2$$
plants & photosynthetic microbes must use oxygen and food in the process of cellular respiration to create an energy molecule used by cells to do work. the equation for cell respiration is pictured below.
$$c_6h_{12}o_6+(19.) \to co_2 + h_2o+(20.)$$
21.) out of the answer choices below, choose all that could be considered an importance of microbes & primary producers to marine ecosystems. *you will bubble in more than one answer for this question.

Explanation:

• For photosynthesis: The reactants are \(CO_2\) (carbon dioxide) and \(H_2O\) (water), and the products are \(C_6H_{12}O_6\) (glucose) and \(O_2\) (oxygen). So for question 17, it's \(CO_2\) (B), and for 18, it's \(C_6H_{12}O_6\) (C).
• For cellular respiration: The reactants are \(C_6H_{12}O_6\) (glucose) and \(O_2\) (oxygen), and the products are \(CO_2\), \(H_2O\), and \(ATP\) (energy). So for 19, it's \(O_2\) (A), and for 20, it's \(ATP\) (E).
• For the importance of microbes and primary producers:
• B (Oxygen Production): Primary producers like algae perform photosynthesis and produce oxygen.
• E (Food Source): They are at the base of the food chain in marine ecosystems.
• C (Adding Usable Nitrogen to the Sea): Some microbes (e.g., nitrogen - fixing bacteria) can add usable nitrogen to the marine environment.
• D (Digesting Molecules Resistant to Decay): Certain microbes can break down complex, decay - resistant molecules. While serving as a habitat (A) is more associated with larger structures like coral reefs rather than microbes and primary producers in general.

Answer:

1. B. Carbon Dioxide (\(CO_2\))
2. C. Glucose (\(C_6H_{12}O_6\))
3. A. Oxygen (\(O_2\))
4. E. Energy (ATP)
5. B. Oxygen Production, C. Adding Usable Nitrogen to the Sea, D. Digesting Molecules Resistant to Decay, E. Food Source