These words were written by Robert Hooke in 1665. The pores or cells that Hooke described were really -

Answers

Answer 1

Answer: they are called Cells because of the pores

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in a well-fed state, brain cells use which one of the following compounds circulating in the blood stream almost exclusively as an energy source?
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Scientists discovered similar fossils in rock masses on continents located both sides of the Atlantic Ocean.How does this discovery provide evidence supporting the theory plate of tectonics?

Answers

Explanation:

Because these fossils would have had no way to get across the ocean, especially for large terrestrial animals. The continents used to be in different locations, allowing some animals to cross. These animals then died on different continents as they shifted, thereby proving that the continents used to be much closer than they are now.

Which are the physical (P), chemical (C), and biological (B) immune responses?P: complement system; C: saliva; B: coughing
P: coughing; C: saliva; B: complement system
P: coughing; C: sneezing; B: complement system
P: complement system; C: saliva; B: sneezing

Answers

The answer is P: coughing; C: saliva; B: complement system.

Coughing is a physical immune response because it mechanically (physically) removes irritants and pathogens from the lungs. Sneezing is also the physical immune response.
Saliva is a chemical immune response because it contains different enzymes able to break down pathogens.
Complement system is a biological immune response because it activates biological molecules, such as antibodies, to remove pathogens from the organism.

Answer:

B)P: coughing; C: saliva; B: complement system. would be your answer

A cell’s relatively constant internal physical and chemical conditions are called __________.A. hemostasis

B. homeostasis

C. osmosis

Answers

B. homeostasis is the term that is used to describe a cell's relatively constant internal physical and chemical conditions.

Which of the following best states the difference between an alcohol and an ether? In an alcohol, a carbon atom is double bonded to an oxygen atom; in an ether, a carbon atom is triple bonded to another carbon atom. In an ether, a carbon atom is double bonded to an oxygen atom; in an alcohol, a carbon atom is triple bonded to another carbon atom. In an alcohol, a carbon atom is single bonded to a hydroxide group (OH–); in an ether, an oxygen atom is single bonded to two carbon atoms. In an ether, a carbon atom is single bonded to a hydroxide group (OH–); in an alcohol, an oxygen atom is single bonded to two carbon atoms.

Answers

Answer: In an alcohol, a carbon atom is single bonded to a hydroxide group (OH–); in an ether, an oxygen atom is single bonded to two carbon atoms.

Explanation: Alcohols are compounds which contain functional group -OH attached to an alkyl group. They are represented by general formula $ROH$ .

Ethers are the compounds which contain functional group -O attached to alkyl groups on both sides. They are represented by general formula $ROR$ .

For example: Methyl alcohol is represented as $CH_3OH$ and dimethyl ether is represented as $CH_3OCH_3$ .

Answer: the answer is c

Explanation:

good luck

Which of these germinal layers give rise to the digestive system, the circulatory system, and the nervous system?

Answers

The three germinal layers are:

Endoderm, mesoderm, ectoderm

They give rise to :

Endoderm -the digestive system (and also the respirative system)
Mesoderm - the circulatory system (including the heart)
Ectoderm - the nervous system including the brain (and the skin)

What keeps Mars in orbit around the Sun? Select one:
a. friction
b. gravity
c. magnetism
d. solar power

Answers

The Sun's gravity combined with the tangential ("sideways") velocity of Mars.

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The color of a mineral’s streak is the same as the color of the mineral itself. (True/False)

When joints are not regularly moved through their entire range of motion, muscles and ligaments eventually _____. a. shorten b. lengthen c. degenerate d. bend

Fungal cell walls are composed of what material?

carbon is released to the atmosphere as carbon dioxide when you breathe during the process of ___ or through the ____ of dead organsims