Its the A option. food web
Answer:
here is the completed picture
Explanation:
The most likely outcome is that the heavy metal pollutants will BIOACCUMULATE in the oysters. Bioaccumulation refers to the gradual accumulation of substances in living things.
Heavy metals include lead, cobalt, nickel, cadmium and mercury. These metals are highly toxic, thereby their bioaccumulation is dangerous for marine ecosystems and human health.
In this case, it is expected that heavy metals bioaccumulate in the internal organs of the oysters. Subsequently, these pollutants will also bioaccumulate in humans that eat contaminated oysters.
Heavy metals are highly toxic even at low concentrations, thereby their bioaccumulation is harmful to human health.
In humans, for example, it has been shown that the bioaccumulation of heavy metals affects the formation of blood cells.
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Answer:
Non- targeted cell lacks intracellular receptor for these hormone.
Explanation:
Receptors that are found on the cell surface are called cell surface receptor and those which are found inside the cell are called intracellular receptors. Intracellular receptor binds to lipophilic molecules. Each receptor binds specifically to a particular ligand or signal molecule.
So even though testosterone and estrogen can diffuse in every cell they will only affect those cell which have specific receptor which can bind to these hormones and then regulate the transcription of a specific gene in the nucleus.
So only those cells will respond to testosterone and estrogen who have specific intracellular receptors for them.
Light travels extremely fast through the air, 300,000,000 m/s. Sound travels much slower, 343 m/s through air. Therefore we can see light in an instant, but it takes a while to hear thunder.
Explanation:
When you compare the numbers (speed of light vs speed of sound) you understand that light is 10^6 faster in speed that sound. When lightning occurs at a greater distance from the observer, this difference in speeds in more perceptible because the two different waves would have to travel greater distances to the observer and the relative differences in speed become increased.
Remember however, that sound travels in a medium while light waves do not require a medium because they are electromagnetic waves. In a vacuum, therefore, you would observe the lightning but never the sound.
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For more on light and sound waves check out;
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