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galben [10]
3 years ago
7

Rachel was very sick with a bacterial infection. The infection was treated with antibiotics. Rachel seemed to get well, but in a

few weeks, she was sick again. How can this be explained? the antibiotics did not kill the bacteria; it forced them to be dormant the stronger, more resistant bacteria survived the antibiotics and reproduced antibiotics only kill a portion of the bacteria, regardless how much medicine Rachel takes
Biology
1 answer:
34kurt3 years ago
3 0

Answer:

Selective pressure: The bacteria become susceptible to the drug and can withstand it.

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How does a cell normally make a thermodynamically disfavored reaction go forward?
Gennadij [26K]

Answer:

by producing enzymes that catalyze non-spontaneous reactions

Explanation:

Thermodynamically disfavored reactions can be referred to as nonspontaneous reactions (ΔG > 0). An enzyme is a catalyst molecule (generally proteins) capable of converting a non-spontaneous reaction into a spontaneous reaction and improve the speed of one chemical reaction in the cell. Enzymes are capable of reducing the energy of the transition state of a chemical reaction (rate of the reaction), thereby modifying the kinetics of a reaction.

7 0
3 years ago
Which of the following is true of all animals?
Sergio039 [100]

Explanation:

they are multicellular

7 0
2 years ago
Is any trace of an ancient organism preserved in rock. Wegener s theory that the​
lesya [120]

Answer:

yes

Explanation:

i had it

3 0
3 years ago
My doctor told me that birth control pills contain small amounts of estrogen and progesterone, and these hormones prevent me fro
german
Ok... This is a bit complicated but bear with me. In a female's body Estrogen and Progesterone are two of the major used to maintain the menstruation cycle. Gonadotrophic substances are an entirely different topic with it being the hormones FSH and LH (These hormones are released while an egg is in development in the ovaries). 

Without going into even deeper specifics. Estrogen is used by the body signal to ovulate, as well as thicken the uterine walls... Progesterone is used to maintain the uterine walls "after" the egg is fertilized. What the pill is suppose to do is actually force a premature ovulation, which is why there is estrogen. The Progesterone's job as is maintain the uterine wall's endometrium to a low level and helps keep blood loss from a period at a minimum. 

If you need clarification please feel free to question.   
8 0
3 years ago
True or false: <br><br> Mollusks are more closely related to roundworms than to annelids.
erik [133]

Answer:

False

Explanation:

Annelids are actually more closely related to species within the mollusk phylum than they are to their worm cousins in the flatworm and roundworm phyla. Although they look quite different on the outside, mollusks and annelids share a more recent common ancestor than roundworms and annelids.

8 0
3 years ago
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