Need help with all 3 please :)

1 answer:

5 0

Answer:

A. Commensalism because the flatworm benefits while the horseshoe crab doesn't but isn't affected.

B. Predator-prey since the shark is the predator and the seal is the prey.

C. Competition because the two males are fighting for the female.

Hope this helps :)

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Savatey [412]

The answer is B The crust provides raw materials necessary for life.

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Penicillins disrupts bacterial cell wall synthesis.

<h3>How does penicillin affect bacterial cell walls?</h3>

Penicillin kills bacteria by inhibiting the proteins which cross-link peptidoglycans in the cell wall .
When a bacterium divides in the presence of penicillin, it cannot fill in the “holes” left in its cell wall.
β-Lactam antibiotics, including penicillins, cephalosporins, monobactams, and carbapenems, are distinguished by a lactam ring in their molecular structure and act by inhibiting the synthesis of the peptidoglycan layer of bacterial cell walls.
Penicillins work by bursting the cell wall of bacteria. Drugs in the penicillin class work by indirectly bursting bacterial cell walls.
They do this by acting directly on peptidoglycans, which play an essential structural role in bacterial cells.