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alexandr1967 [171]
3 years ago
8

Tuberculosis is a disease caused by a bacterium and can often be fatal. For several decade , antibioticre very succesful in kill

ing tuberculosis bacteria but now strains of the bacteria have developed that can only killed by when treated for long period of time with multiple types of antibiotics. Why have the antibiotics become less effective aagainst tuberculosis
Biology
1 answer:
yaroslaw [1]3 years ago
8 0
I think it’s because the bacteria has evolved and become immune to the antibiotics.
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Please help
Arada [10]

25% is the approximate production efficiency of this animal

Explanation:

Given ,

A ladybug eats 200 J of plant material

100 J is eliminated as feces

75 J are used in cellular respiration,

Now,

The approximate production efficiency of this animal :

200 - (100 +75) = 25 %

7 0
3 years ago
The molecules that make the cell surface fuzzy, sticky, and sugar-rich are
stepan [7]
<span>The answer would be </span>glycoproteins.
8 0
3 years ago
Some scientists who are Christians have developed a theory called ___________ to explain the creation and development of life on
Grace [21]

Answer:

Intelligent Design

Some scientists who are Christians have developed a theory called Intelligent Design to explain the creation and development of life on earth.

However, in my opinion its complete nonsense

3 0
3 years ago
Chimpanzees belong to the animal kingdom, and mushrooms belong to the fungus kingdom. What do they have in common?
olga55 [171]
I think they are both heterotrophs 

7 0
3 years ago
Beginning with a cell that just fertilized ( 1 cell ) how many times must it divide to become a 64 cell blastomere ?
natka813 [3]

A cell that just fertilized has to divide 6 times to form a 64 cell blastomere.

<u>Explanation:</u>

Human reproduction begins with the fusion of male gamete sperm and female gamete ovum. The fusion of sperm and ovum forms the zygote that is diploid. The zygote then undergoes mitotic division to develop into embryo.  

The zygote first divides into two and the two individual cells divide again to form four individual cells and so on. Thus the number of cells after each division can be represented by the equation 2^n  where n is the number of divisions.  in the question it is given that the blastomere has 64 cells.

2^n=64  

n=6

This means that the fertilized cell has to divide 6 times to develop into 64-celled blastomere.

7 0
3 years ago
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