Answer:
Nose, Pharynx, Larynx, Tracha, Bronchi and Lungs
The study in a Pennsylvania forest reveal about the environmental effects of using DDT reveals that a large number of ladybird were killed due to DDT which caused rise in the population of aphids.
DDT is a chemical that was used for killing the insects and keeping the crops safe and productive. It was later found that it has a worse effect on the lives of other non target organisms like other insects, bird and human as well.
It is also known to be associated with the phenomenon of biomagnification. It is a process of accumulation of harmful chemicals with increase in the trophic level which occurs due to continuous intake of food contaminated with chemicals that is not tolerable and causes serious implication.
To learn more about DDT here
brainly.com/question/1657474
#SPJ4
the membrane receptors are activated when a certain chemical attaches itself to the receptor.
<span>Each of the protein chains are conjugated to a nonprotein heme group.Hemoglobin is
the protein that's made of the four polypeptide chains. Each of these chains contains a heme group. Red blood cells are primary players in the oxygen hauling, and they wouldn't be able to do their job if it the weren't for a special molecule called the heme.</span>
Answer: A. True
Explanation: Cell receptors are proteins that receive signals and trigger a signal cascade for the cell can respond. There's many types of receptors, depend of their location and their enzymatic activity, and each type can recognize certain signals. For example, tyrosine-kinase receptors can recognize growth factors, JAK associated receptors can recognize cytokines, etc. That specificity is given by the structure of the receptor and the structure of the signal.