Answer:
In 1928, at St. Mary's Hospital, London, Alexander Fleming discovered penicillin. This discovery led to the introduction of antibiotics that greatly reduced the number of deaths from infection.
The discovery of penicillin was actually a mistake!
Fleming obtained an extract from the mold, naming its active agent penicillin. He determined that penicillin had an antibacterial effect on staphylococci and other gram-positive pathogens.
Explanation:
Photos means light
tropos means turning
phototropism means turning towards the light
answer is A
(gravotropizom is like gravity, if you hold that kind of plant sideways, it will try to turn sidewyas, dunno thigmatropism, helio tropizom is turning toward the sun (but ther are other light sources other than sun))
Natural selection eliminates aniamals that might be nessisary to life but it would hepl other animals survive as food for them
Answer:
Ambitious
DNA determines the fate of each cell.
DNA is the basic genetic unit for each cell and contains information about the fate of the cell. The DNA of daughter cell which remains in stem cell state and continues to divide causes production of those substances which promote it to stay in stem cell state and also promote its continuous division. On the other hand, the DNA of specialized cell causes production of substances which changes characteristics of the cell and causes it to become a mature and specialized cell.
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Explanation:
Answer:
Decondense
Explanation:
when the chromosomes are tightly condensed, the DNA is wrapped very tightly, making it difficult for transcription factors to bind to the DNA