<span>learning about the interactions and functions of living organisms
</span>
"Diffusion is one way<span> by which </span>materials move<span> in and out of </span>cells<span>. Small molecules such as oxygen </span>can<span> pass </span>through<span> tiny gaps in the </span>cell membrane<span> by diffusion. ... Oxygen molecules </span>move<span> out of the </span>cell<span> by diffusion."</span>
Answer:
an autotroph is a <em>producer</em> in the food chain
Explanation:
An autotroph produces its own food from light, heat, and/or environmental chemicals, often including water and/or carbon dioxide. It is a <em>producer</em>, not a consumer, in the food chain.
The number of electrons in a neutral atom equals to the number of protons in the nucleus.
Answer:
To the operator of the operon
Explanation:
A repressor binds to the operator of the operon. This blocks the attachment of RNA polymerase to the promoter, preventing transcription of the genes.
You can see the different elements of the operon and the region where the repressor binds in the image below (lac-operon):
