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Leona [35]
3 years ago
13

What year did anton van leeuwenhoek contribute to the cell theory?

Biology
1 answer:
shepuryov [24]3 years ago
7 0

Answer:

1678

Explanation:

In 1678, Antoni van Leeuwenhoek reported that he had observed "little animals" — protozoa — through a microscope. The discovery of the cell was made possible by the invention of the microscope, which was made possible by improved lens-grinding techniques.

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In part A, you analyzed genes that contribute to two diseases. (cystic fibrosis and muscular dystrophy) How can scientists use t
N76 [4]

Answer:

By designing suitable gene therapies in order to restore target gene expression.

Explanation:

Cystic fibrosis and muscular dystrophy are inherited genetic disorders associated with serious health problems. Cystic fibrosis is caused by mutations in the gene that encodes for the cystic fibrosis transmembrane conductance regulator (CFTR) protein, and it is a condition associated with abnormal production of sticky mucus that leads to problems in the lungs and the digestive systems. On the other hand, muscular dystrophy is produced by mutations in genes localized on the X chromosome such as, for example, the gene 'dystrophin'. Gene therapy is an experimental approach used to compensate abnormal gene function by introducing exogenous genetic material and thus restore their altered protein products. Consequently, personalized gene therapies can be useful to treat inherited disorders such as cystic fibrosis and muscular dystrophy.

4 0
3 years ago
What does the word biomass refer to?
valentina_108 [34]
It is the total mass of organisms in the given area 
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3 years ago
What does polymerase chain reaction (PCR) do?
sineoko [7]

Answer:

A. makes more copies of a sample of DNA

8 0
3 years ago
Systemic lupus erythematosus (SLE or lupus) is distinct from other autoimmune disorders because Systemic lupus erythematosus (SL
Alina [70]

Answer:

All these responses are correct

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The systemic lupus erythematosus (SLE) is an autoimmune disorder that may be linked to both environmental and genetic factors. This disease is caused by the own immune system (i.e., antibodies) that is directed against the body's tissues in a healthy person.

7 0
3 years ago
What are the role of all four types of lipids: fats, phospholipids, waxes, and steroids.
ycow [4]
Steroids
are complex structure four connected rings of carbon atoms. They are cholesterol which is in all body cells and used to synthesize other steroids:sex hormones, such as estrogen, and testosterone and several hormones from the adrenal glands.

Waxes
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Phospholipids
consist of Glycerol portion and fatty acid chains. Only two fatty acids chains; in place of the third is portion that include a phosphate group. THe phosphate portion is soluble in water [hydrophobic] forms the ''head'' of the molecule, while the fatty acids portion is insoluble in water [hydrophobic] and forms a ''tail''.

Fats
to store energy for cellular activities. Carbohydrates fat molecules are composed of carbon, hydrogen and oxygen atoms.


6 0
3 years ago
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