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3 years ago

50 POINTS!!!!!!!

Biology

2 answers:

Lilit [14]3 years ago

6 0

Answer:

chitin

Explanation:

Blababa [14]3 years ago

6 0

Answer:

chitlin

Explanation:

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Identify structure A.

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3 years ago

Which statement is accurate about natural selection?(1 point) A. Natural selection cannot inactivate genes. B. Natural selection

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3 years ago

The number of cells in an average-sized adult human is on the order of 10^14 cells. Use this information, and the estimate that

KengaRu [80]

IF:
Number of cells: $C = 10^{14}$
DNA lenght: $D = 2m = 12.42 * 10^{-4} mi$
Distance from Earth to Sun: $ES=93000000 mi = 9.3* 10^{7}mi$

Then:
a) Over how many miles would the total DNA from the average human stretch?
The answer is product of multiplication of the number of cells (C) and the DNA length (D):
Total DNA: $T = C*D$
⇒ $T = 10^{14}*12.42* 10^{-4} mi$
⇒ $T = 12.42* 10^{14-4} mi$
⇒ $T = 12.42* 10^{10} mi$
The total DNA from the average human will stretch $12.42* 10^{10} mi$

b) How many times would the total DNA from the average human stretch from Earth to the Sun and back?
The answer is concluded from the ratio of the total DNA length (T) and the twice (because of stretch to the Sun and back, thus, two directions) of distance from Earth to the Sun (ES) and :
Ratio: $R= \frac{T}{2*ES}$
⇒ $R = \frac{12.42* 10^{10}mi }{2*(9.3* 10^{7}mi)}$
⇒ $R = \frac{12.42* 10^{10}}{18.6*10^{7}}$
⇒ $R = 0.6677* 10^{10-7}$
 ⇒ $R = 0.6677* 10^{3}$
 ⇒ [tex]R = 667.7
Thus, 667,7 times will the total DNA from the average human stretch from Earth to the Sun and back.

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3 years ago

The juxtaglomerular cells release the enzyme ______________ when the macula densa cells detect low blood volume or solute concen

zhuklara [117]

Renin enzyme

Renin enzyme are also known as angiotensinogenase and function by regulating the body means arterial blood pressure. They do circulate in the blood stream and digest angiotensinogen that was secreted in the liver into peptide angiotensin 1. Thus, they are secreted by the kidney and placenta.

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3 years ago

The bone that is situated next to the eardrum is called the __________; the bone that sits next to the oval window is called the

EastWind [94]

The bone that is situated next to the eardrum is called the malleus.

The bone that sits next to the oval window is called the stapes.

Given,

The bone that is situated next to the eardrum is called the __________; the bone that sits next to the oval window is called the __________.

We need to fill in the blanks.

<h3>What are eardrums and their parts?</h3>

The eardrum is a transparent gray membrane and there is a middle ear

bone called the malleus attached to the center part of the drum.

The space inside the ear drum is called the middle ear.

The three smallest bones of the body are found in the middle ear.

They are:

- The hammer (malleus)

It is attached to the eardrum.

- The anvil (incus)

It is in the middle of the chain of bones.

- The Stirrup (stapes)

It is attached to the membrane-covered opening that connects the middle ear with the inner ear (oval window)

Thus

The bone that is situated next to the eardrum is called the malleus.

The bone that sits next to the oval window is called the stapes.

Learn more about identifying the functions of parts of the ear

here:

brainly.com/question/13275697

#SPJ4

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2 years ago