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butalik [34]
4 years ago
8

What is the main cause of an aurora

Biology
1 answer:
Phoenix [80]4 years ago
7 0

When charged particles from the sun strike atoms in Earth's atmosphere, they causeelectrons in the atoms to move to a higher-energy state. When the electrons drop back to a lower energy state, they release a photon: light. This process creates the beautiful aurora, or northern lights

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A tree grows about one-foot each year. you carve your initials into the trunk of a tree that is 15 feet tall. your initials are
hjlf
The initials will still be 4 feet above the ground.

Trees do not grow from the bottom up. At the branch tips there is meristem tissue, so called the apical meristem. Trees grow in height from these apical meristems, so trees grow from the top and the initials on the bottom of the tree will stay at the same height above the ground.
6 0
4 years ago
The graphic shows the citric acid cycle. A diagram of the citric acid cycle is shown. Acetyl C o A enters the citric acid cycle
vagabundo [1.1K]

Answer:

It enters the citric acid cycle and associates with a 4-carbon molecule, forming citric acid, and then through redox reactions regenerates the 4-carbon molecule.

Explanation:

Acetyl-CoA(2C) associates with oxalacetate(4C) to form citric acid(6C). Then through redox reactions, CO2 molecules result from decarboxylation (COOH becomes R-(R1)CH-R2). And through dehydrogenation H2 molecules are incorporated in NADH+ in FADH2, resulting in the 4-carbon molecule at the beginning (oxalacetate). That's why it's called a cycle(Kreb's cycle or citric acid cycle)

3 0
4 years ago
Read 2 more answers
The following diagram shows parts of the rock cycle. Which process is shown by letter A?
Ksenya-84 [330]

Your answer is A ; weathering and erosion

Explanation:

On the surface weathering and erosion break down igneous rocks into pebbles,sand and mud ,creating sediments which accumulates in basins on the Earth's surface

4 0
3 years ago
A mosquito can transmit a viral pathogen into humans. What is the mode of transmission of the virus in this instance
Elza [17]
Vector… i think that’s right
5 0
2 years ago
What determines whether a person is male or female?
iVinArrow [24]
There are 23 pairs of chromosomes in each human cell and the autosomes (chromosome pairs 1-22) determine certain characteristics. However, there is still one more pair of chromosomes and these are called the sex chromosomes and they can either be shaped as XX or XY. The father's chromosome is the chromosome that determines whether it is a boy or girl, and there is an exact 50/50 chance of it being male or female you just need to draw a punnet square. 

Hope this helps :)
5 0
3 years ago
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