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kramer
3 years ago
8

What is the orign of a compound microscoppe​

Biology
1 answer:
abruzzese [7]3 years ago
8 0

Answer:

Explanation:

Dutch spectacle makers Zaccharias Janssen and Hans Lipperhey are noted as the first men to develop the concept of the compound microscope

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crayfish, like the one seen here, lives in water. Bennie wondered how changes in temperature would affect the movement of crayfi
Natali [406]

Answer:

The answer is "The temperature of the water."

Explanation:

Because he is trying figure out if the temperature affects how the crayfish lives

5 0
3 years ago
What main idea about the nature of the cell did historical scientists disagree on?
VLD [36.1K]

Explanation:

Scientists didnt belive that there are cells untill robert hooke (1665). He observed the cells in a cork slice with the help of a PRIMITIVE microscope

Leeuwenhoek (1674), with the help of an improved microscope, discovered free living cells in pound water for the first time.

It was robert brown in (1831) who discovered the nucleus in the cell.

Purkinjie in 1839 coined the term 'protoplasm' for the fluid substance of the cell.

THE CELL THEORY, that all plants and animals are composed of cells and that the cell is the basic unit of life, was presented by two biologists, schleiden (1838) and schwann(1839). The cell theory was fuether expanded by virchow (1855) by suggesting that all cells aris form PRE-EXISTING cells. With the discovery of the electron microscope in 1940,it was possible to observe and understand the complex structure of the cell and its various organelles.

Well, thats the history of the discovery of cells.

7 0
2 years ago
A Venn diagram can be used to compare and contrast nucleic acids. Which characteristic would be correctly found in B?
soldier1979 [14.2K]

Out of the following given choices;

contain ribose

consist of two strands

made of nucleotides

have an R group

The answer is 'made of nucleotides'. This is because out of the choices, DNA and RNA share the similarity of being made of nucleotides. However, while DNA is made of deoxyribose nucleotides, RNA is composed of ribose nucleotides. This difference is that in deoxyribose nucleotide, the 2nd carbon has a hydroxyl group while ribose nucleotide has hydrogen.

6 0
3 years ago
The structure of aba is shown below. why was this a suitable substitution for a cys residue? under what circumstances would it n
Inessa [10]

Answer and explanation;

-Aba is a suitable replacement because Aba and Cys have approximately the same sized side chain and are similarly hydrophobic.

-However, Aba cannot form disulfide bonds so it will not be a suitable replacement if these are required.

-Alpha-Aminobutyric acid is biosynthesized by transaminating oxobutyrate, a metabolite in isoleucine biosynthesis.


8 0
3 years ago
Question 11 (1 point)
Effectus [21]
I’m very sure it would be carbon dioxide, plants use carbon as part of photosynthesis, glucose is there food, oxygen is their afterproduct. So the answer is carbon dioxide
7 0
2 years ago
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