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3 years ago

When microscopes were first used hundreds of years ago, scientists discovered that a single drop of water contains

Biology

2 answers:

WINSTONCH [101]3 years ago

7 0

Answer: The answer is the A

Explanation: Because I do the assignment

RSB [31]3 years ago

6 0

Answer:

It is A

Explanation:

I took the Edguinuity quiz got a 100%

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The ____________ contains mitotic cells. the ____________ contains layers of compacted, highly keratinized epithelial cells. the

Artemon [7]

Nail matrix
nail body
free edge nail
nail root

Nails are hard plates of tightly packed keratinized cells. They are clear and cover the dorsal surface of the last phalanges of fingers and toes. Nails protect the the ends of the fingers, allow us to scratch various parts of our body and help us grasping and manipulating small objects.
The site of nail growth is the nail matrix that is found beneath the nail root. The nail matrix is thick and is only composed of the deeper layer of the epidermis: the stratum basale (or germinativum). The keratinization of the cells of the nail matrix proceeds in the absence of a stratum granulosum and lucidum and this results into formation of a of a rigid and durable plate. As the nail matrix thus proliferates and differentiates, this hard plate is pushed forward onto the nail bed and the nail grows.

8 0

3 years ago

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how do proteins play an important role in the mating of japanese beetles? a. by storing lipids for future use by the reproductiv

r-ruslan [8.4K]

d. by sending and detecting chemical messages

7 0

3 years ago

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Please answer it as soon as possible. Grade: 9th Subject: Science

gavmur [86]

Answer:

1aNeon

b. positive charge.

c. As atomic number is equal to no. of protons and no. of electron and atomic number 10 element is Neon.

Positive charge as it have lost one of it's electron.

Atomic number = no. of protons = no. of electron and since electron can be shared loose or gain to develop charge it have loose on electron.

2a. 4 protons

b. 2 electrons

c. In question 2(a) the atomic number of Be is 4 so it would have four protons.

And as for question (b) it is said it have 2 charge which means positive charge would mean that it have lost 2 electrons and is left with 2 electrons which fulfill it's duplet configuration.

4 0

3 years ago

Which of the following is likely to be made from a thermoplastic?

sergij07 [2.7K]

a grocery bag

Thermoplastic is known to be a plastic material with a polymer that can be molded above a specific temperature and solidifies upon cooling. Thermoplastics can be remelted or reshaped by heating and they have low melting points. Furthermore, they usually have high concentration of polymers with amorphous structures, the material will have a poor resistance to loads but it will have an excellent elasticity.

8 0

3 years ago

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An engineer is building a new steel skyscraper in a area with a lot of Earthquakes, Compare two systems (fixed based system and

Leokris [45]

Answer:

<h2>Base isolated system</h2>

Explanation:

Fixed based system:-

A fixed-base building (built directly on the ground) will move with an earthquake’s motion and can sustain extensive damage as a result.

Base isolated system:-

A base isolation system is a method of seismic protection where the structure (superstructure) is separated from the base (foundation or substructure).

Hence,

A base isolated system is much more better in a area where there are a lot of earthquakes. 

5 0

3 years ago