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Romashka-Z-Leto [24]
3 years ago
13

Explain why hydrogen atom can become either an ion or part of a molecule.

Biology
1 answer:
saveliy_v [14]3 years ago
3 0
It can become an ion because it can lose or gain an electron. It can become a part of molecule because it can form covalent bond with other atoms to gain a full valence shell.

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Endosymbiotic theory is supported by similarities between chloroplasts and * Cyanobacteria Viruses Yeasts None of the above
stiv31 [10]

Answer:

Endosymbiotic theory is supported by similarities between chloroplasts and * Cyanobacteria.

Explanation:

The endosymbiotic theory proposes that mitochondria and chloroplasts were once free-living bacteria that were phagocytized by another cell but not digested. These bacteria got to adapt to their host, and both cells became interdependent.  

Both organelles have many similarities with other free-living bacteria. Chloroplasts probably derivate from cyanobacteria because both cells absorb sunlight, produce ATP, and organic molecules. And mitochondria derivate from rickettsias because they produce ATP in the same way by using the Krebs Cycle and Oxidative Phosphorylation.

From the phagocytosis moment, these two cells became so dependant on each other, they could not survive without the other one.  

Chloroplasts and mitochondria share some traits with free-living bacteria, that support the theory.  

• Both organelles present their genetic material. This DNI is independent of the cells´ DNA, is bi-catenary and circular, identical to the bacterial DNA, and very different from the one of the eukaryotic cells.

• Both organelles divide by binary fission, not by mitosis, and can synthesize their ribosomes and organelles.    

• Both organelles present a double membrane, a characteristic that reinforces the idea of being phagocyted. The internal membrane looks identical to the bacterial membrane, while the external membrane looks like the eukaryotic one.  

In fact, in this internal membrane are placed the energy centers, just as it occurs in bacterias membrane.  

• Finally, the sizes of the organelles are similar to the size of some procaryotes

6 0
3 years ago
Voluntary or conscious activities of the body are controlled by the a. medulla oblongata. b. cerebrum. c. cerebellum. d. brain s
BigorU [14]

The cerebrum controls the higher brain functions such as speech, writing, etc. The cerebellum deals with the involuntary stuff. The other 2 are nowhere near what you are looking for.              B - Cerebrum is your answer.

4 0
3 years ago
Which statement describes global winds?
Mamont248 [21]

Answer:

probably the last one because winds tend to travel from colder areas to hotter areas

5 0
3 years ago
What is scientific inquiry? who can use it and what does it involve?
Ivenika [448]
Scientific inquiry is to think , ponder, and have an interest in investigating something that exist or you think may exist or should exist. Anyone can use it ( kind of like the scientific method) but people who commonly use it seriously is police, scientists, and other career fields who find it necessary. Scientific inquiry involves a person, research tools, space, writing pad, and one, etc.
4 0
3 years ago
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How many chromosomes are in a haploid cell?
Inga [223]

First you must know that a diploid cell has double the amount of chromosomes of a haploid cell. A diploid cell has 46 chromosomes. When we divide 46 by 2 you get 23. This means that there are 23 chromosomes in a haploid cell.

Hope this helped!

~Just a girl in love with Shawn Mendes

4 0
3 years ago
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