Question

question 1 : 2039311
photosynthesis
photosynthesis is an important process that takes place in plants and other autotrophs, where they convert light energy from the sun into stored chemical energy in the form of glucose. this process primarily occurs in the chloroplasts of plant cells, which contain chlorophyll, the green pigment responsible for capturing light energy.
the overall chemical equation for photosynthesis can be represented as:
\\(6co_2 + 6h_2o \
ightarrow c_6h_{12}o_6 + 6o_2\\)
during the photosynthesis process, light energy is absorbed by chlorophyll and used to split water molecules into hydrogen and oxygen. the hydrogen combines with carbon dioxide to form glucose, while the oxygen is released into the atmosphere. this transformation of light energy into chemical energy is essential not only for the survival of plants but also for all living organisms that rely on plants for food and oxygen.
figure 1: photosynthesis diagram
image of photosynthesis diagram showing sun, plant, h₂o, co₂, o₂
part a
laura recently moved from florida, where its sunny most every day, to seattle, washington where it is overcast and rainy most days. her houseplants are struggling. what is the most likely cause?
a they are not getting enough light.
b they are getting too much water.
c they are not getting enough fertilizer.
d they need more carbon dioxide.
part b
in the elodea experiment, what is the general trend in the rate of photosynthesis as light intensity increases from 100 lux to 300 lux at a constant carbon dioxide concentration of 300 ppm and water temperature of 20°c?
a the rate of photosynthesis remains constant.
b the rate of photosynthesis is steadily decreasing.
c the rate of photosynthesis is steadily increasing.
d we dont have enough information to answer this.

Explanation:

Part A

Photosynthesis requires light energy. Laura moved from a sunny place (Florida) to an overcast/rainy place (Seattle). Less sunlight means less light energy for photosynthesis. Water (Option B) is abundant in Seattle (rainy), so overwatering is less likely. Fertilizer (Option C) isn't mentioned as changed. Carbon - dioxide (Option D) levels aren't indicated to be an issue here. Light is the key factor as per the photosynthesis process description (needs light for the reaction \(6CO_2 + 6H_2O
ightarrow C_6H_{12}O_6+6O_2\) where light is absorbed by chlorophyll).

Light is a limiting factor for photosynthesis (up to a point). When other factors (carbon - dioxide at 300 ppm and water temperature at \(20^{\circ}C\)) are constant, as light intensity increases (from 100 lux to 300 lux), more light energy is available for the light - dependent reactions (splitting water, generating ATP and NADPH which are used in the Calvin cycle to make glucose). So the rate of photosynthesis (which can be measured by oxygen production or glucose synthesis) will increase as more light is available for the process described in the photosynthesis overview (light energy absorption by chlorophyll etc.).

Answer:

A. They are not getting enough light.

Part B