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Soloha48 [4]
3 years ago
13

Why do you think death rates were so high?give two reasons

Biology
1 answer:
densk [106]3 years ago
7 0

Answer:

In 1900, the annual mortality rate was one in 42 Americans. ... 8556), co-authors David Cutler and Ellen Meara explore how we achieved such gains in health: that is, ... In the next two decades, life expectancy improvements were split relatively ... Infectious diseases were the leading cause of death in 1900, accounting for 32 ...

Explanation:

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Certain antibacterial drugs such as trimethoprim and the sulfonamide drugs (e.g., sulfadiazine, sulfamethoxazole) selectively in
d1i1m1o1n [39]

Answer:

Folic acid

Explanation:

Antibacterial drugs helps fight the bacterial infections. these drugs helps release essential amino acids by impairing the production of folic acids in bacterial cells. Bacteria infection may get severe and hazardous if they are leave untreated.

8 0
3 years ago
Which statement best explains how to draw a cladogram that includes the rynchosaur?
romanna [79]

The correct answer is option B

A cladogram can be defined as a diagram that uses cladistic to show the relation among the organisms. Many evolutionary trees can be made from a single cladogram but the cladogram cannot be considered as the evolutionary tree because it does not shows that how the ancestors of the species is related to the descendants.

The cladogram of reptiles are made.




3 0
3 years ago
14. What two things limit the size of cells?
sergiy2304 [10]
14. Surface Area , and Volume Area limits the size of cells.

15 .A cell is a metabolic compartment where a multitude of chemical reactions occur. The number of reactions increase as the volume of metabolic volume within a cell increases. (The larger the volume the larger the number of reactions)  
All raw materials necessary for metabolism can enter the cell only through its cell membrane.  
The greater the surface area the larger the amount of raw materials that can enter at only one time.  
Each unit of volume requires a specific amount of surface area to supply its metabolism with raw materials. The amount of surface area available to each unit of volume varies with the size of a cell.  
As a cell grows its SA/V decreases.  
At some point in its growth its SA/V becomes so small that its surface area is too small to supply its raw materials to its volume. At this point the cell cannot get larger.

16. Cells only divide when they receive specific signals from proteins called mitogens,the presence of mitogens can limit cell division. Mitogens are needed for cell division in healthy cells and are released depending on what cells the body needs.
4 0
3 years ago
Stomatas are pores on the plant leaf that control the flow of gases between the environment and the plant cells. This process he
Serga [27]
The biology theme wherein the example given above represents the concept of homeostatic equilibrium. Homeostatic equilibrium or otherwise known as homeostasis is clearly depicted in the situation because it cites on how the stomatas regulate the gases on the plant leaf in order to maintain stability. 
8 0
3 years ago
I need to know what which weathering it is
gogolik [260]

Answer:

the answer is D

Explanation:

Rocks break down into smaller pieces through weathering. Rocks and sediment grinding against each other wear away surfaces. This type of weathering is called abrasion, and it happens as wind and water rush over rocks. The rocks become smoother as rough and jagged edges break off.

7 0
3 years ago
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