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nadya68 [22]
3 years ago
11

Refer to the paragraph about the formation of the isthmus of panama. the sister populations on opposite sides of the isthmus are

true species under which species concept?
Biology
1 answer:
Dimas [21]3 years ago
6 0
The answer is reproductive isolation. Reproductive isolation ensures members of different species do not produce offspring. In this case, geographical separation is ensuring that individuals from the two different populations are not able to mate with each other. Eventually, through different selective pressures, the two populations will diverge sufficiently in genotype to become distinctly different.
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A.
Alexxandr [17]

Answer:

The species is extinct.

Explanation:

Endangered signifies that species will soon go extinct.

6 0
3 years ago
In general, why might cell-wall inhibiting antimicrobial drugs be less effective on gram-negative bacteria compared to gram-posi
asambeis [7]

Cell-wall inhibiting antimicrobial drugs be less effective on gram-negative bacteria compared to gram-positive bacteria because the outer membrane of the gram-negative bacteria inhibits penetration of the drug and the peptidoglycan found in gram-positive bacteria is structurally different from that in gram-negative bacteria.  

Answer: Option B & C

<u>Explanation:</u>

Antimicrobial drugs are induced into a body to act on that particular selective bacterium which causes disease. When antimicrobial drugs are injected they act efficiently on the gram positive bacteria inhibiting the proliferation of the cells by acting on the cell wall so that cell multiplication doesn’t happen.

On the other hand it is hard to act on the gram-negative bacteria as it has a cell membrane that inhibits drug penetration into it. Both cell walls contain peptidoglycan but in the gram-positive is more assembled and layered while in the gram-negative it is just a thin layer. As gram-positive is thick layered it provides place for another molecule to attach to it but the thin layer in gram-negative inhibits it.

4 0
3 years ago
B) Diuresis and Uremia (cause and problem)
Harrizon [31]

b:failure of pituitary gland to secrete ADH .caauses diabetes inspidus.

c:located at the kidney.cortex dark in colour and its the outermost.medulla red in colour and lies at the centre.

8 0
3 years ago
Reactant - product
Studentka2010 [4]

Answer:

C

Explanation:

8 0
3 years ago
Read 2 more answers
While working construction you are injured and are taken to the emergency room. While there you receive injections of both tetan
Alex17521 [72]
<h2>Active and Passive Immunity</h2>

Explanation:

  • Immunity can be obtained distinctly and Recovery from clinical tetanus doesn't bring about assurance against future disease by <em>active or passive immunization</em> and recovery from the clinical<em> for example, immunization, immunoglobulin treatment, or move of maternal antibodies through the placenta</em>
  • Active inoculation stimulates the <em>immune system  to deliver antibodies against a specific irresistible specialist</em>
  • <em>Active immunity</em> can emerge normally, as when somebody is presented to a pathogen.<em> For example,</em> a person who recuperates from a first instance of the measles is <em>insusceptible to advance immunity</em>
8 0
3 years ago
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