كويز تفاعلي: Science Assessment Quiz

A

The outer double membrane contains chlorophyll pigments that actively synthesize glucose from water vapor.

B

The fluid-filled stroma stores heavy mineral deposits to reflect excess solar radiation away from the plant stem.

C

The thylakoid membranes are stacked into grana to maximize surface area for light absorption, while the fluid stroma contains enzymes for building sugars.

D

The thylakoid lumen acts as an open channel that completely drains all enzymes out of the chloroplast to stop chemical reactions.

A

Increasing the use of chemical fertilizers and ignoring industrial runoff.

B

Testing water quality parameters and improving wastewater treatment processes.

C

Relying solely on rainfall to dilute pollutants without active testing.

D

Expanding urban concrete surfaces to prevent water from absorbing into the ground.

A

Phloem tissues are hollow dead tubes that suction water from the roots, while xylem tissues use living cells to store unrefined sugars within the upper epidermis.

B

Vascular bundles branch into a dense network of veins, where xylem vessels transport water and minerals to the leaf cells, and phloem sieve tubes carry manufactured sugars away from the leaf.

C

Leaves lack a dedicated internal transport network, instead relying on surface stomata to absorb nutrients directly from rainwater and morning dew.

D

The vascular system consists entirely of open air spaces in the spongy mesophyll that allow fluid nutrients to wash freely across the leaf exterior.