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Stels [109]
3 years ago
10

The presence of which organelle indicates that eukaryotic cells have evolved from prokaryotic cells

Biology
1 answer:
mixer [17]3 years ago
3 0

The presence of a membrane bound nucleus describes the evolution of eukaryotes from prokaryotic organisms. The endosymbiotic theory describes the same, the large cells engulfed the smaller ones, and the engulfed cells were not digested but started living in mutual cooperation with the engulfing cell. Mitochondria and chloroplast are thought to be the engulfed cell

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An object has a kinetic energy of 32 J and a mass of 36 kg, how fast is the object moving?
marin [14]

Answer:

1.33 m/s

Explanation:

The formula for Kinetic Energy is given as:

K.E=\frac{1}{2} mv^{2} \\

Where, m is the mass and v is the velocity of the object. In order to tell how fast is the object moving we need to calculate its velocity.

Re-arranging the above equation and isolating v, we get

2 K.E = mv^{2}\\\\v^{2} = \frac{2 K.E}{m}

Putting values in this equation, we get:

v^{2}=\frac{2 \times 32}{36}\\\\ v^{2}=\frac{16}{9}\\\\ v=\frac{4}{3}\\\\  v=1.33

Thus, the object is moving with a velocity of 1.33 m/s

7 0
3 years ago
3.
kicyunya [14]

Answer:

i have not a clue in the world lol

3 0
2 years ago
Determine how to make positive and negative ions. Based on your exploration which subatomic particle is positive? Which subatomi
Katena32 [7]

Answer:

Atoms are electrically neutral as a result of having an equal amount of positive (due to the protons) and negative (due to the electrons) charges on it.

An ion generally is an electrically unbalanced atom (i.e an atom with a net charge on it)

A negative ion called an anion is produced when an atom gains an extra electron from a neighboring atom, giving it an extra negative charge. This can be produced by ionization with a radioactive radiation or simply by dissolution.

A positive ion is called a cation and it is produced when an atom loses electron to a neighboring atom. The loss of this electron causes the positive charges to outweigh the negative charges in the atom. Cations can be produced by radioactive radiation ionization of an atom or by simple dissolution.

The subatomic particle that is negative is the 'electron'.

6 0
3 years ago
A weakened immune system may be caused by
Soloha48 [4]

Answer:

immunodeficiency disorders,and etc

Explanation:

because immunodeficiency disorder- is a disorder that helps you attract more viruses and illness. it can bae acquired trough birth or dieting or lack of energy foods...

4 0
3 years ago
Recall the following rules for base pairing in a DNA strand (note: not in an RNA strand):
Annette [7]

Answer:

AAATT - TTTAA  

CGCAT - GCGTA

GGGAC - CCCTG  

ACGGT - TGCCA

Explanation:

In DNA, A and T, also known as adenine and thymine pair together and G and C, also known as guanine and cytosine pair together due to the hydrogen bonds formed between the two bases.

7 0
3 years ago
Read 2 more answers
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