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stellarik [79]
3 years ago
6

How did earth become a planet???

Biology
2 answers:
oee [108]3 years ago
4 0
Large fragments of dust and debris clump together to form a planet
Ratling [72]3 years ago
3 0
Earth formed around 4.54 billion years ago, approximately one-third the age of the universe, by accretion from the solar nebula. Volcanic outgassing probably created the primordial atmosphere and then the ocean, but the early atmosphere contained almost no oxygen.
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Which regions of phospholopid molecules are hydrophobic ​
olchik [2.2K]

Answer:

The tails

Explanation:

The tails of the layer reject water, making it harder for things to get in and out of the cell

6 0
3 years ago
Read 2 more answers
What membrane activities requires energy from atp hydrolysis?
NikAS [45]

Answer:

active transport, like Na + ions leaving the cell

Explanation:

The active transport requires an energy expenditure to transport the molecule from one side of the membrane to the other, but the active transport is the only one that can transport molecules against a concentration gradient, just as the diffusion facilitated the active transport is limited by the number of transport proteins present.

Two major categories of active, primary and secondary transport are of interest. The primary active transport uses energy (generally obtained from ATP hydrolysis), at the level of the same membrane protein producing a conformational change that results in the transport of a molecule through the protein.

The best known example is the Na + / K + pump. The Na + / K + pump performs a countertransport ("antyport") transports K + into the cell and Na + outside it, at the same time, spending on the ATP process.

The secondary active transport uses energy to establish a gradient across the cell membrane, and then uses that gradient to transport a molecule of interest against its concentration gradient.

8 0
3 years ago
Which of the following best describes the cell cycle?
Slav-nsk [51]

Answer: C.

Explanation:

Out of all of the answer choices, answer C most properly describes the cell cycle.

8 0
3 years ago
Which of the following would cause an error in DNA replication?
oksian1 [2.3K]

Explanation:

The first option, the others are normal

7 0
2 years ago
Which situation would an epidemiologist most likely study? a serious disease outbreak that infects hundreds of people a genetic
Zigmanuir [339]

The correct answer is A. A serious disease outbreak that infects hundreds of people

Explanation:

In science, the epidemiology is a fill that studies diseases especially in terms of the way diseases emerge and then spread in populations or the way diseases become epidemics. This implies, epidemiologists focus on diseases outbreaks rather than on inherited diseases. Moreover, epidemiology plays an important role in preventive health as well as actions to control epidemics. Considering this, it can be concluded an epidemiologist is likely to study " A serious disease outbreak that infects hundreds of people" because epidemiologists focus on the causes, transmission, and outbreaks of epidemics which are diseases that spread in a population.

3 0
2 years ago
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