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3 years ago

Number the events from earliest (1) to most recent (6) to outline the development of the cell theory.

Biology

2 answers:

mr Goodwill [35]3 years ago

7 0

Answer:

The chronological order of events ealiest to most recent (1-6) are given below:

Explanation:

1. Hans and Zacharias Janssen created the first microscope in the year 1590.

2. Robert Hooke was the first to use the word "cell." In the year 1665

3. Anton van Leeuwenhoek observed small organisms he called "animalcules." In the year 1674

4. Matthias Schleiden theorized that plants are made of cells in the year 1838

5. Theodor Schwann theorized that animals are made of cells in the year 1839

6. Rudolf Virchow theorized that cells come from other pre-existing cells in the year 1855

NNADVOKAT [17]3 years ago

3 0

Answer:

Number the events from earliest (1) to most recent (6) to outline the development of the cell theory.

✔ 3

Anton van Leeuwenhoek observed small organisms he called “animalcules.”

✔ 2

Robert Hooke was the first to use the word “cell.”

✔ 4

Matthias Schleiden theorized that plants are made of cells.

✔ 5

Theodor Schwann theorized that animals are made of cells.

✔ 1

Hans and Zacharias Janssen created the first microscope.

✔ 6

Rudolf Virchow theorized that cells come from other pre-existing cells.

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We are studying 3 strains of bacteria, with populations p1, p2, p3, in an environment with three food sources, A, B, C. In a day

Nastasia [14]

Answer:

The population of each bacteria in 1, 2, 3 are 12, 8, and 7 respectively.

Explanation:

From the given information:

For food source A; we have:

3P₁ + P₂ + 2P₃ = 58 units of food A ---- (1)

For food source B; we have:

2P₁ + 4P₂ + 2P₃ = 70 units of food B ---- (2)

For food source C; we have:

P₁ + P₂ = 20 units of food C ----- (3)

From equation (1) and (2); we have:

3P₁ + P₂ + 2P₃ = 58

2P₁ + 4P₂ + 2P₃ = 70

By elimination method

3P₁ + P₂ + 2P₃ = 58

2P₁ + 4P₂ + 2P₃ = 70

P₁ - 3P₂ + 0 = - 12

P₁ = -12 + 3P₂ ---- (4)

Replace, the value of P₁ in (4) into equation (3)

P₁ + P₂ = 20

-12 + 3P₂ + P₂ = 20

4P₂ = 20 + 12

4P₂ = 32

P₂ = 32/4

P₂ = 8

From equation (3) again;

P₁ + P₂ = 20

P₁ + 8 = 20

P₁ = 20 - 8

P₁ = 12

To find P₃; replace the value of P₁ and P₂ into (1)

3P₁ + P₂ + 2P₃ = 58

3(12) + 8 + 2P₃ = 58

36 + 8 + 2P₃ = 58

2P₃ = 58 - 36 -8

2P₃ = 14

P₃ = 14/2

P₃ = 7

Thus, the population of each bacteria in 1, 2, 3 are 12, 8, and 7 respectively.

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3 years ago

How might biodiversity help an ecosystem recover from volcanic eruption?

kodGreya [7K]

ANSWER:

After the volcanic eruption,lava cools down,vegetation reappears and microscopic plants grow,then the macroscopic plants and animals come at that place,then gradually the whole system builds and ecosystem recovers.

EXPLANATION:

Biodiversity means diverse population of plants and animals. After the volcanic eruption,both plants and animals donot exist because of high temperature and not suitable environment. With the passage of the time, the lava cools down and vegetation stars reappearing. First of all lichens and microscopic plants and after that macroscopic plants and animals come at that place.Thus suitable conditions reappear and gradually the whole ecosystem recovers.

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3 years ago

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Which two terms describe a condition in which there is widespread scaling of the skin?

Furkat [3]

exfoliative dermatitis

Generalized exfoliative dermatitis is a severe inflammation of the entire skin surface due to a reaction to certain drugs, a pre-existing skin condition and sometimes cancer. In approximately 25 percent of people, there is no identifiable cause. It is characterized by redness and scaling of the skin that begins in patches and spreads.

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3 years ago

Ou are told that the cells on a microscope slide are plant, animal, or bacterial. You look at them through a microscope and see

grandymaker [24]

Answer:

The correct answer is c) are plant cells.

Explanation:

The cells cannot be animal cells, because they have not wall (this kind of cells has only plasma membrane). In addition, eukaryotic cells have membrane-bound organelles (which are surrounded by a phospholipids membrane, such as endoplasmatic reticulum, Golgi apparatus, lysosomes, etc.), whereas prokaryotic cells lack them. Since plant cells are eukaryotic and bacterial cells are prokaryotic, the cells you are looking are plant cells.

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3 years ago

Why is water considered a renewable resource? answers?

Marianna [84]

Water is considered a renewable resource because the Earth does provide it by itself. Therefore it’s renewable.

Hope I could help! :)

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