It became more polluted due to the gas steam engines and factories set off into the atmosphere. Another reason would be that many people lived in close quarters, especially poor people so they had to crowd two+ families in one small space. This often made it a very dirty environment and more likely to catch diseases. Plus, trees got cut down to make room for new developments.
Brainliest please? Hope this helped you!
Among the given choices, an example of homeostasis is the first choice, which is when a cactus <span>stores water during wet periods, allowing it to live through dry periods
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Homeostasis refers to the ability or tendency of a system (i.e. physiological) to maintain a stable internal environment even when environmental or external conditions may change or vary.
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The other examples given in the choices do not reflect equilibrium because they depict the inability of the body or organisms to maintain a stable internal environment because of failure to cope with changes in the external environment (too much heat, cold, and water loss).
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Answer:
Option A is correct
Explanation:
Cadherin proteins in metastasizing cancer cells are likely to have mutations that make them less "sticky
Operons are the functional units of transcription and genetic regulation. These are found in bacteria and their viruses where genes coding for functionally related proteins are grouped along the DNA.
The two types of operons are- inducible and repressible.
They regulate the genes as in negative inducible operons, a regulatory repressor protein is bound to the operator. It prevents the transcription of the genes on the operon. If positive inducer is present, it binds to the repressor and changes its conformation so it is unable to bind to the operator.
I do not if you are talking about a specific type of bird but ''bird'' is a group and an ornithologist is a person who studies birds