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Blizzard [7]
2 years ago
8

Anton Leeuwenhoek Devised a primitive microscope to observe a sample of his tooth scrapings. How did this help contribute it to

cell theory?
A-it help to show that cells cannot function independently. B it helped to show that some bacteria can swim like fish. C- it help to show that some bacteria are just one cell. D-it help to show that cells can be created into thin air.
Biology
1 answer:
4vir4ik [10]2 years ago
6 0

Answer:

C- it help to show that some bacteria are just one cell.

Explanation:

Anton Leeuwenhoek was the first scientist who observed the presence of bacteria in his tooth scratch under the microscope made by himself. At that time there was no concept of bacteria and he named those small creatures as animalcules which were later termed as bacteria.

Leeuwenhoek during 1670s  sent the details of his experimentation on algae and bacteria to Royal Society of London.

It was due to his that primitive experiment that made the discovery of bacteria and make it known to other scientists. Therefore option C is the best option that demonstrates that bacteria are single celled organisms that are very minute. When we look at cell theory there is a postulate that shows that cell is the fundamental unit of function and structure  of all living organisms. So, the work of Anton Leeuwenhoek holds substantial importance in the formulation of cell theory.

Hope it helps!


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A man has a pointed frontal hairline known as a widow's peak. This trait is thought to be controlled by a dominant allele. His w
Dmitry_Shevchenko [17]

Answer:

a. His father's mother lacks a widow's peak.

Explanation:

To find out if you are homozygous or heterozygous, you need to find out the genotype of your parents. This you do by looking at their phenotype, their grandparents, uncles. After that it's easy to find out if it's homo or heterozygous. Of course, this need not even be done when it is a characteristic determined by recessive alleles, but in the case of a characteristic determined by dominant alleles, such as widow's peak (W), we must visualize the characteristic in the individual's country.

Since the man, shown in the question above, has widow's peak, so that your child knows if he is homozygous or heterozygous, just look at whether the trait is present in this man's parents. If his mother doesn't have widow's peak, we automatically know that the man is heterozygous, and that was his father's estate. However, if this man's mother has widow's peak and his father does, then the man is homozygous.

3 0
1 year ago
Imagine that we mate two black labrador dogs with normal vision and find that three of the puppies are like the parents, but one
True [87]
For the answer to the question above, I believe the answer based on the given information above, <span>the alleles for color and vision segregate independently during gamete formation. That's why the two Labradors are different. The other one is healthy and the other one is not. </span>
5 0
1 year ago
Part B<br> What are the strengths and weaknesses of the cell model?
matrenka [14]

Answer:

strengths:The cell model shows all the process involved, and it's easy to understand, even if a person isn't familiar with the process

weaknesses: it doesnt show organelle or rna

7 0
1 year ago
List two pieces of evidence from the film justifying the claim that “termite mounds are an advantage to the savanna ecosystem.”
Lunna [17]

Answer:

Termites can spend time building mounds there by aerating the soil and allowing moisture which support the growth of shrubs, grasses, tress.

Through their mounds, their droppings contain phosphorus and nitrogen which add to the soil nutrients and supports grasses, shrubs and trees growth.

Explanation:

Termites are commonly found in Savannah ecosystem in African areas and they build mounds. Termites mounds consist of their fecal droppings , saliva and clay.

Termites can spend time building mounds there by aerating the soil and allowing moisture which support the growth of shrubs, grasses, tress.

Through their mounds, their droppings contain phosphorus and nitrogen which add to the soil nutrients and supports grasses, shrubs and trees growth.

3 0
1 year ago
If you were studying the effects of climate change on the geographic ranges of species living in the mountains and your climate
Andrews [41]

A species that is habitat specialist and lives at the highest elevation.

Explanation:

An ecosystem consist of plants, animals as well as micro-organisms but due to climate change the plants as well as animals are in danger . The case that has been provided in the question where due to climate change the temperature rises as a result the species living at the highest elevation are in problem .

Due to rise in temperature the snow is melting and the sea water level is rising. The animals and plants adapt themselves according to the climate where they are residing but suddenly if climatic change take place they will be unable to survive.

The animals which are mostly affected due to climatic change are snow leopard, polar bear, giant panda.  

3 0
1 year ago
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