J is the answer my boi so don’t ask me how
Answer:
C. At least five mass-extinction events have occurred during the last 500 million years.
Explanation:
- The history of mass extinct is related to the five mass extinctions that are caused over by the 350 million years n which many species have disappeared in there short geologic time.
- A massive extinction is caused in the Permian Triassic extinction event i.e about 250 mn years ago which on an estimate has killed 90% of the species.
- The Cretaceous–Paleogene extinction event that occurred over 66 million years ago is known to have wiped out the dinosaurs and many other species.
Answer:
eqqus
Explanation:
Equus—the genus to which all modern equines, including horses, asses, and zebras, belong—evolved from Pliohippus some 4 million to 4.5 million years ago during the Pliocene. Equus shows even greater development of the spring mechanism in the foot and exhibits straighter and longer cheek teeth
Answer:
Cell wall synthesis
Explanation:
Antibiotics are the compounds that work against bacteria and kills bacteria or slow their growth. Every antibiotic have their own mode of action. Beta-lactam antibiotics like penicillin and cephalosporins work on cell wall synthesis.
They stop the synthesis of peptidoglycan by inhibiting the transpeptidation reaction. So when no new cell wall is added into bacteria, holes creates in the cell wall which allows the free movement of solute inside the bacteria cell that results in osmotic lysis of the bacterial cell. Therefore the right answer is cell wall synthesis.
<span>Normal bodily functions can change</span>
