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blagie [28]
3 years ago
9

1. Which of these statements is not a part of the Cell Theory?

Physics
1 answer:
Dmitry_Shevchenko [17]3 years ago
6 0
1. C There are two main types of cells
Even though it's true that there are this 2 types of cells, this is not one of the following statements.
Statements in cell theory:
<span>-All living organisms are composed of one or more cells, although there is controversy about virus since they have a non-cellular.
-The cell is the basic unit of life and organization in organisms.<span>
- Cells always arise from pre-existing cells( spontaneous generation doesn't exist)

2. C  </span></span>Both Prokaryotes and Eukaryotes
Both types of cells need to have genetic information, otherwise it's not possible to transfer the information to the "daughter-cells" when replication happens. Also, it would be possible to synthesize proteins, necessary for cell's survival<span>

3. B- </span><span>Eukaryotes only

</span>Plants have the so called plant cells, which are a type of <span>eukaryotic cell.
</span>In plant cells we find a external wall composed by different kind of cellulose,  chloroplasts;  vacuoles, which don't exist in animal cells.
Other organelles such as the well define nucleus, mitochondria, endoplasmic reticulum, Golgi complex, lysosomes, cytosol are what it makes a eukaryotic cell.


4.B -Eukaryotes only
All living organisms except bacteria and Archaeas are eukaryotic, that includes  protists. Protists are a diverse group of organisms but they are primarily microscopic and unicellular, or made up of a single cell. Their cells are organized with a nucleus and organelles, making protist a group formed by eukaryotic cells.

5- B Eukaryotes only
All living organisms except bacteria and Archaeas are eukaryotic, that includes us humans. Trillions of cells are found in the human body and they are all eukaryotic because they have their genetic material (DNA) within the nucleus that is bound by a double membrane.

6- C <span>Both Prokaryotes and Eukaryotes
</span>The cytoplasm is the material within a cell, that means: the gel-like substance and the organelles.
All cells have a plasma membrane, cytoplasm, DNA, nucleus, mitochondria, endoplasmic reticulum, Golgi complex and lysosomes

7. B Eukaryotic cells only

Eukaryotic cells contain groups of proteins that function as a unit called organelles. An example of these organelles is the lysosome.
  It contains many enzymes that digest proteins, nucleic acids and lipids. It's important that they are not all over the cytosol because they would digest all of the other organelles, leading to cell death. The fact that they are bound to the membrane keeps them away from killing the cell.

8. C- Both Prokaryotes and Eukaryotes
Ribosomes are found in both prokaryotes and eukaryotes. They are not bound to the membrane; Ribosomes build protein based on the genetic information that the cell contains and that's a very important function for both types of cells.

9-  <span>B- Eukaryotes only

There are two main types of eukaryotic cells, the animal and the plant cells.
The name says it all, animals(including humans) have animal cells </span>
because they have their genetic material (DNA) within the nucleus,
<span>contain membrane-bound organelles, that carry out specific functions (like lysosomes) necessary for normal cellular operation.

10. B- </span>Eukaryotes only

The fungi group is formed by either unicelular( only one cell) or pluricellular (two or more cells) livings beings but they all are eukaryotes.
<span>Fungal cells contain a membrane-bound nuclei and other cytoplasmic organelles such as mitochondria, and ribosomes bound to the membrane.

11. A- </span>Prokaryote only<span>
Aside from bacteria and Archeaes, all the other groups are eukaryotes.
</span><span>While the eukaryotes have a well defined nucleus with all the DNA inside, the bacterias and archeaes have their genetic material all spread throughout the cytoplasm of the cell.

</span>12.B Eukaryotes only
This is  one of the differences in Eukaryotic cells and prokaryotes. While the eukaryotes have a well defined nucleus with all the DNA inside, the prokaryotes have their genetic material all  spread throughout the cytoplasm of the cell.


13. C - <span>Both Prokaryotes and Eukaryotes
</span>
The cell membrane( also called cytoplasmic membrane), is a biological membrane that separates the interior of a cell from the outside environment. It's formed by  a lipid bilayer with embedded proteins. This membrane chooses what comes inside the cell, and what comes out of it in prokaryotes and eukaryotes.







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Sergeeva-Olga [200]

the velocity would be 0 mph

The answer is B.

3 0
2 years ago
A passenger jet flies from one airport to another 1273 miles away in 2.7 h. Find its average speed.​
AnnZ [28]

Answer:

Average speed of passenger jet

s = 471.48\ mi/hr

Explanation:

Let s be the average speed of the passenger jet.

Given:

Distance from one airport to another airport d = 1273\ mi

Total time taken t = 2.7\ hr

We need to find the average speed of the passenger jet.

Solution:

Average speed formula:

The ratio of the total distance travelled by the object to the time taken to cover that distance.

Average\ speed = \frac{Total\ distance\ travelled}{Total\ time\ taken}

s = \frac{d}{t}

Substitute total distance and time value in above equation.

s = \frac{1273}{2.7}

s = 471.48\ mi/hr

Therefore, the average speed of the passenger jet is s = 471.48\ mi/hr.

3 0
3 years ago
All of the following activities produce quantitative data exept
Keith_Richards [23]

Answer:

The answer to your question are A and C

Explanation:

Quantitative data are quantities, something that we get after measuring something.

A. Measuring the rate of gas production from a chemical.  This example is a quantitative measure, because we are measuring the rate.

B. Describing the clarity of water in a sample  If we are describing something, means that we are not measuring anything, so this is not a quantitative measure.

C. Calculating the energy released from an electrochemical reaction If we are not measuring but we are using the data somebody else got to calculate energy, them this is a quantitative data.

7 0
2 years ago
On a planet where g = 10.0 m/s2 and air resistance is negligible, a sled is at rest on a rough inclined hill rising at 30°. The
Cloud [144]

Answer:

Explanation:

a is the acceleration

μ is the coefficient of friction

Acceleration of the object is given by

a = g (\sin  \theta -\mu \cos \theta)\\\\=10( \sin 30 - 0.4 \cos 30)\\\\=10(0.5-0.3464)\\\\=1.54m/s^2

Velocity at the bottom

v^2=u^2+2as\\\\u=0\\\\v^2=2as\\\\=2*1.54*8\\\\=24.576\\\\v=4.96m/s

after travelling 4m , its velocity becomes 0

a=\frac{v^2-u^2}{2s}

a=\frac{0-u^2}{2s}

a=\frac{-(-4.96)^2}{2*4} \\\\=-3.075m/s^2

Coefficient of kinetic friction

μ = F/N

=\frac{ma}{mg} \\\\=\frac{3.075}{10} \\\\=0.31

Therefore, the Coefficient of kinetic friction is 0.31

8 0
2 years ago
Read 2 more answers
In April 1974, Steve Prefontaine completed a 10 km race in a time of 27 min, 43.6 s. Suppose "Pre" was at the 8.13 km mark at a
SOVA2 [1]

Answer:0.084 m/s^2

Explanation:

Given

Total time=27 min 43.6 s=1663.6 s

total distance=10 km

Initial distance d_1=8.13 km

time taken=25 min =1500 s

initial speed v_1=\frac{8.13\times 1000}{25\times 60}=5.6 m/s

after 8.13 km mark steve started to accelerate

speed after 60 s

v_2=v_1+at

v_2=5.6+a\times 60

distance traveled in 60 sec

d_2=v_1\times 60+\frac{a60^2}{2}

d_2=336+1800 a

time taken in last part of journey

t_3=1663.6-1560=103.6 s

distance traveled in this time

d_3=v_2\times t_3

d_3=\left ( 5.6+a\times 60\right )103.6

and total distance=d_1+d_2+d_3

10000=8.13\times 1000+336+1800 a+\left ( 5.6+a\times 60\right )103.6

1870=336+1800 a+\left ( 5.6+a\times 60\right )103.6

a=0.084 m/s^2

5 0
3 years ago
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