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Savatey [412]
3 years ago
14

2. What is the word that means “within the cell,” such as referring to signals moving from one place to another within the cell?

Biology
1 answer:
goldenfox [79]3 years ago
8 0
I believe its intracellular
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The graph shows the changes in the number of animal fauna's living on earth overtime in how the fauna's were affected by differe
eduard

Answer: C) The event at the end of the Triassic Resulted in the extinction of fewer fauna’s then in any other period

Explanation:

Looking at the graph, the event at the end of the Triassic resulted in the smallest dip in the amount of fauna in the graph. This means that this event resulted in the extinction of fewer faunas than any of the other five major events.

Option A is wrong as the event at the end of the Devonian decreased the number of Cambrian fauna.

Option B is wrong as the event at the end of the Cretaceous resulted in a decrease in the Paleozoic fauna.

Option D is wrong because the event that resulted in the Extinction of more fauna’s then in any other period was the event at the end of the Permian.

4 0
3 years ago
25 POINTS!! i keep getting bots this is the last time someone actually answer please
Cerrena [4.2K]

Answer:

39, 78 I think I'm so sorry if I'm wrong

8 0
3 years ago
Is everyone’s heart biologically the same
WINSTONCH [101]
Yes and no. Everyone's heart works the same way, is made of the same type of tissue and is located in the same part of the body. However, there are people with diseases who have hearts that are in worse condition and may look different. For example, people with coronary artery disease experience plaque build up in their coronary arteries, which causes a reduction of blood flow to the heart, and in order to treat this they may get a bypass surgery in which another blood vessel from somewhere else in the body, would be used to bypass the blocked blood vessel. In this case the anatomy of that person's heart would be slightly different.
7 0
3 years ago
Read 2 more answers
Indicate whether each of the following statements is true of depurination (DP), deamination (DA), or pyrimidine dimer formation
solniwko [45]

Answer:

- This process is caused by spontaneous hydrolysis of a glycosidic bond: depurination and deamination

- This process is induced by ultraviolet light:  pyrimidine dimer formation

- This can happen to guanine but not to cytosine: depurination

- This can happen to thymine but not to adenine:  pyrimidine dimer formation

- This can happen to thymine but not to cytosine: none

- Repair involves a DNA glycosylase: deamination

- Repair involves an endonuclease: depurination, deamination and  pyrimidine dimer formation

- Repair involves DNA ligase: depurination, deamination and  pyrimidine dimer formation

-  Repair depends on the existence of separate copies of the genetic information in the two strands of the double helix: depurination, deamination and  pyrimidine dimer formation

- Repair depends on cleavage of both strands of the double helix: none

Explanation:

Depurination is the loss of purine bases (either adenine or guanine), while deamination refers to the removal of an amino group. During depurination, a β-N-glycosidic bond is cleaved by hydrolysis and a nucleic base is released (either adenine or guanine). All DNA bases may undergo deamination, except thymine (since thymine does not have an amino group). The ultraviolet (UV) radiation can cause thymine or cytosine to form dimers (e.g., pyrimidine dimers), being thymine dimers the most common lesion when DNA is exposed to UV light. Pyrimidine dimers may be repaired by different excision mechanisms, e.g., nucleotide excision repair, where the recognition of the DNA damage leads to the removal of the DNA fragment containing the lesion. DNA glycosylases are enzymes involved in the mechanism of base excision, these enzymes recognize and remove damaged bases by hydrolysis of the glycosidic bond, producing an abasic (apurinic and apyrimidinic) site. A DNA ligase enzyme covalently joins two DNA molecules by forming a phosphodiester bond, which is required during these processes.

8 0
2 years ago
How does the earth work as a natural green house?
Dafna1 [17]
When the Sun’s energy reaches the Earth’s atmosphere, some of it is reflected back to space and the rest is absorbed and re-radiated by greenhouse gases.
3 0
3 years ago
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