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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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What produced the elements heavier than iron (Fe)?
anastassius [24]

Answer:

Neutron-capture inside stars.

Explanation: Although there are other minor contributions they are not only produced in stars that explode in supernova.

4 0
3 years ago
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The muscle that compresses the cheek against the teeth when we chew is the
exis [7]

Answer: buccinator

Explanation:

The buccinator is a muscle that looks quadrilateral in shape. It is present between the internal of mandible and maxilla. It basically forms the anterior portion of the cheek and also forms the part of the oral cavity. The buccinator muscles compresses the cheeks against the teeth. These muscles are used to perform the acts like blowing. The buccinator muscles are the assistant muscles which helps in the process of mastication or chewing and in case of neonates it is used to suckle.

6 0
3 years ago
What opposes the sliding motion of two<br> surfaces that are in contact.
sergeinik [125]

Answer:

Friction: A force that opposes the motion of objects that touch as they move past each other. Friction acts at the surface where objects are in contact.

Explanation:

The force that acts against your pushing force is called friction. is a force that resists the motion between two surfaces in contact. When you try to slide two surfaces across each other, the force of friction resists the sliding motion.

5 0
2 years ago
Which two (2) statements are correct examples of the “structure determines function” relationship among specialized cells in an
Nady [450]

Answer:

A and E are the correct.

Explanation:

Examples of the structures that determine function:

a) <u>Chloroplasts </u>only found in plant cells. They work to fix the CO2 in the presence of <u>light energy</u> (sunlight) and convert the reactants into <u>sugar molecules (carbohydrates</u>) that can be used by cells for metabolic functioning.

e) <u>Sperm</u> is the male reproductive cell. Motile sperm cells have a tail-like structure that typically <u>move via flagella</u> and requires a water medium in order to swim toward the egg <u>for fertilization</u>.

Other options are not correct because <u>they don't explain their function according to their structure</u>.

6 0
3 years ago
What body system contains a structure that can expand to hold more waste products A. Urinary System B. Endocrine System C. Respi
miv72 [106K]

Answer:

A. Urinary system its the one system that holds waste

Explanation:

3 0
3 years ago
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