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uysha [10]
3 years ago
7

Name the scientists who proposed the cell theory

Biology
2 answers:
FinnZ [79.3K]3 years ago
8 0

Answer:

Name the scientists who proposed the cell theory?

Theodor Schwann and Matthias Jack Schleiden in 1839 proposed cell theory

Explanation:

makvit [3.9K]3 years ago
7 0

The scientists who were credited in the  proposal of the cell theory is Matthias Schleiden and Theodor Schwann.

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Is it possible for one biome to change from one type to another?
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<span>Yes, it is possible to change on biome to another!</span>
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How might more than one agent of physical weathering operate in the same place
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By being in the same area or Causing weathering at the same time or place
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A student in science class is observing a cell under a high-powered microscope and sees two structures that are found in both pl
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4 years ago
Distinguish between first-generation pesticides and second-generation pesticides used by people to combat pests, and give an exa
Lady bird [3.3K]

Answer:

No short answer.

Explanation:

First and second generation pesticides differ vastly in terms of their contents and effects.

First generation pesticides were used in early 20th century up until the 1940's and they consisted chemicals such as mercury and lead which were not biodegradable and they started adding up in the soil until it was not fertile anymore. Second generation pesticides were divided into three groups as chlorinated hydrocarbon, organophosphates or carbamates and consisted of chemicals that were less harmful for the soil and did not accumulate over time. Some examples to second generation pesticides can be DDT or dimethoate.

Broad spectrum and narrow spectrum pesticides have the difference of effective range between them. Narrow spectrum pesticides are designed to target a specific organism such as a specific plant or an insect whereas broad spectrum pesticides are applicable to a wider range of organisms and still have the same effect for each.

Chitin Inhibitors can be given as an example of narrow-spectrum pesticides and the second generation pesticides in the answer can be given as an example of broad-spectrum pesticides.

I hope this answer helps.

6 0
4 years ago
One isotope of sodium has 11 protons and 7 neutrons. What is the mass number of this isotope?
Alecsey [184]

The mass number, also known as an atomic mass number or nucleon number, refers to the total number of neutrons and protons (in a combination known as nucleons) in an atomic nucleus. It determines the atomic mass of atoms. However, while calculating the mass number, the small contribution of mass from electrons is ignored.  

Mass number is equal to Number of protons + Number of neutrons  

Mass number = 11 + 7 = 18.  

Hence, the correct answer is 18.  


7 0
4 years ago
Read 2 more answers
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