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Nastasia [14]
3 years ago
12

Please answer these 4 questions.

Biology
2 answers:
ira [324]3 years ago
6 0

Answer:I just did this exact same thing do we go to the same school lol

Explanation:

Elza [17]3 years ago
6 0
1) The environment changed when the mosquitoes went from a high population down to a lower one.
2) It is a short term change in the environment because even though the population was at its lowest in year 5, it increased every year after that.
3) The organism responded to these changes by dying off every year. They started to adapt to the pesticides after a couple of years.
4) Future populations of mosquitoes will be immune to the pesticides that they used. Scientists will have to create a new one for the new generation.
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At 4:00 p.m. a closed flask of sterile broth is inoculated with 10,000 cells. the lag phase lasts 1 hour. at 9:00 p.m. the cultu
PilotLPTM [1.2K]
<span>8:40 p.m

</span>The typical growth curve for population of cells can be divided into several distinct phases called the lag phase, log phase, stationary phase and death phase.
Lag phase- When a microbial population is inoculated into a fresh medium, growth usually does not begin immediately but only after a period of time called the lag phase, which may be brief or extended depending on the

Log phase (exponential phase)In this phase - bacterial cell numbers doubles during each unit time period (i.e. generation time). For example: a culture containing 1,000 organisms per ml with a generation time of 20 minutes would contain 2,000 organisms per ml after 20 minute, 4,000 after 40 minute, 8,000 after 60 minutes, 16,000 after 120 minutes. The generation time of most bacteria is between 20 minutes to 20 hours.history of culture and growth conditions.

Stationary phase- The number of new cells produced balances the number of cells that die, resulting in a steady state. In batch culture, exponential growth cannot occur indefinitely because the essential nutrients of the culture medium are used and waste products of organisms accumulate in the environment. In stationary phase there is no net increase or decrease in cell number. 

Death phase- If incubation continues after a bacterial population reaches the stationary phase, the cells may start dying. Cell death may be due to cell lysis and this is also an exponential process but much slower than that of exponential growth.


8 0
3 years ago
Explain the compatility of blood groups during blood transfusion<br>​
Alinara [238K]
  • the blood groups are (A ,B,AB,O)
  • THE blood group AB is called the universal receiver because any other blood group can be compatible with this blood group this is due to the absence of anti-bodies in this type
  • while blood group O is called the universal donor because it is compatible with all blood groups due to the absence of antigen (A and B)
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6 0
3 years ago
Large doses of antibiotics given to fight an infection are likely to destroy bacteria that produce vitamin K. In which digestive
Gnom [1K]
I'm guessing Liver.
If it was in the stomach, we wouldn't get belly aches. If it were in the large intestine, we wouldn't poop. So that's my guess.
4 0
3 years ago
which list shows the levels of organization in hierarchical order from left to right feom the smallest to the most complex
umka2103 [35]

Answer:

chemical composition,cells, tissues,organs,organ systems,organism.

7 0
3 years ago
QUESTION 1
Paladinen [302]

Answer:

1. RNA

2. Cytosine and guanine

3. RNA

4. Replication

5. Unwinding the double helix

6. DNA polymerase

7. Identical

8. Repair the DNA

9. Changes in nucleotides of a DNA molecule that affect the genetic message

10. The gene for beta-galactosidase turns off.

11. p53

12. A part of DNA that does not code for a functional protein

13. Proteins

14. Transfer RNA

15. The making of an RNA molecule from a DNA strand by pairing of bases of RNA nucleotides with the complementary bases in DNA

16. 3

17. Tertiary

18. Enzymes

19. The reaction slows down.

20. The active site of an enzyme

21. 60%

22. Conserved energy

23. different

24. Gene expression

I hope that this helps you !

5 0
3 years ago
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