Answer:
3. B. deforestation
5. A. extinction of up to 25 percent of all land species by 2050.
Explanation:
:D
The P wave of the electrocardiogram is considered as a signal from the DEPOLARIZATION of the atria in the heart. This depolarization drives the contraction of the atrial musculature.
An electrocardiogram (ECG) is a device that records the electrical activity of the heart. This record can then be used to diagnose different heart conditions.
The P waves occur when the sinoatrial node generates an action potential which is capable of depolarizing the atria.
This depolarization is then followed by atrial contraction and an increase of the pressure in the atria.
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The correct size order from the smallest to the largest is:
Animal cell >> Mitochondrion >> Ribosome >> Hexokinase >> ATP >> O2
- The animal cell size is about 20 to 30 micrometers (μm), although it varies according to the type of the cell.
- The average mitochondria size is approximately 0.75 to 3 μm. The size, number, and structure of mitochondria in an animal cell vary according to type of animal cell.
- The ribosome size is approximately 0.02 μm in diameter.
- An enzyme is a macromolecule whose size is variable (its average size is 3–7 nanometers, i.e., 3-7 nm). A micrometer (μm) equal to 1000 nm.
- The adenosine triphosphate or ATP (the energy coin of the cell, which is composed of a five-carbon sugar, three phosphate groups, and adenine) and molecular oxygen (O2) are both simple molecules whose sizes are very small compared to enzymes.
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The answer is;
- Biotic – planktons
- Abiotic - temperatures
A biotic factor that affects viral activity is planktons and bacteria in the sea. Viruses insect bacteria, planktons and use their machinery to replicate themselves. Viruses, therefore, lyse and kill many bacteria in the seas and make carbon available in the oceans- hence drive the carbon cycle.
Temperature is an abiotic factor in the sea that affects viral activity. Higher temperatures or too cold waters will reduce viral activity in the oceans and seas.
Answer:
Carboxylic acid.
Explanation:
Amino acids are made up of the amine group, carboxyl group, hydrogen and R hydrophobic chain. Amino acids are the monomers of the protein and they are coded by the particular codons.
Amino acids contains both the amino group and the carboxyl group. The carboxylic group is a polar group and becomes negative charged when the pH of the solution is greater than the pKa value of the amino acids.
Thus, the answer is carboxylic acid.
