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svet-max [94.6K]
3 years ago
15

In the darkness, a pinpoint of light becomes visible. Someone has turned on a flashlight. The pin­point grows to the size of the

bulb. Because this is slow motion, only the bulb is bright. Nothing else lights up—yet.
Now the light begins to spread outward from the bulb. It fills a bigger and bigger space. As the light moves forward, it strikes little fog droplets, the ground, a sneaker, a tree, a cat. After each collision, some light bounces off. It is redirected. Some of it reaches a person's eyes. Only then can the light trigger the person's eyes and brain. In slow, stretched-out speech, the person says, "L000000-000000k! Aaaaaaaaaaaa caaaaaa-aaat!"
—A Black Hole Is NOT a Hole,
Carolyn Cinami DeCristofano
Why did the author include this description?
0 to explain how a star produces light
0 to explain how light travels
0 to explain how cats see in the dark
0 to explain how fog forms
Biology
1 answer:
Firlakuza [10]3 years ago
8 0

Answer:

to explain how light travels

Explanation:

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Where does the energy come from to add a uracil to the 3' end of a transcript?
Xelga [282]
The hydrolysis of pyrophosphate from the approaching UTP atom. The term pyrophosphate is additionally the name of esters framed by the buildup of a phosphorylated organic compound with inorganic phosphate, concerning dimethylallyl pyrophosphate. This bond is likewise alluded to as a high-vitality phosphate bond.
3 0
3 years ago
Please help me with this question.
guajiro [1.7K]

Answer:it is a

Explanation:because it just makes sence.lol

3 0
2 years ago
Which of the following choices lists the ways that you can show intellectual honesty in scientific communication.
Alika [10]

Answer:

<em>The correct option is A) Do not let your personal beliefs interfere with the truth; do not omit facts even if they contradict your hypothesis or your goals; avoid bias; do not make up data; do not plagiarize; give credit to others if you cite their work.</em>

Explanation:

Ethics and scientific research go hand in hand. If intellectual honesty and ethics are not maintained during scientific research, then this field could raise many ethical concerns.

Modifications in results are strictly against ethics during scientific research. A scientist should never try to manipulate the results so that it supports their hypothesis. Cheating or stealing other peoples work is also not acceptable in the scientific world. A scientist should always be modest.

5 0
3 years ago
1.Can a woman with A blood mate with a man with B blood and have children with O blood? 2.Which genes would the man and woman ha
julia-pushkina [17]

Answer:

Yes

Explanation:

Yes, it is possible. If the woman would have blood AO and the father BO. This would mean there is a 25% chance the child could be OO blood. They would receive an O allele from their mom and an O allele from their dad, in all other cases the O allelle is recessive so AO would be A blood type and BO would be B blood type. AB would be type AB.

    B         O                                      

A   AB     AO                              

O   BO    OO                      

8 0
3 years ago
What specific part of the cell/structure allows the mucus secretions to be thick and viscous rather than fluid (i.e., is it a me
Ksenya-84 [330]

Answer:

The CFTR behaves like a channel for chlorine. Its dysfunction affects both the transport of this ion and other ions and the transport of water, which causes a thickening of secretions, an alteration of mucociliary transport and local defenses, facilitating bacterial colonization and promoting the release of pro-inflammatory mediators in the airway

Explanation:

CFTR is a protein expressed in the epithelial cells of the respiratory system, pancreas, bile ducts, sweat glands and genitourinary system. It is made up of a single chain made up of 1,480 amino acids. It contains 12 hydrophobic regions embedded in the lipid membrane and acts as a channel for chlorine.The highest levels of expression of the CFTR protein are found in serous cells of the submucosal glands of the proximal airway. In them, Cl- is released to the outside. In addition, there are channels for Na +, through which this ion is also secreted in the same direction. These movements cause the displacement of water and also of mucins, originating in the submucosal glands, allowing their presence on the surface of the airway. For all this to occur normally, a basolateral Na + - K + - ATPase cotransporter must function, another basolateral cotransporter formed by Na +, K + and 2 Cl-, which allows the latter to enter the cell, and an apical CFTR channel through which it exits the Cl- of the cell towards the acinar lumen. Na + leaves the cell following Cl- by a paracellular pathway accompanied by water. When CFTR malfunctions, Cl- does not exit through this channel and this implies a decrease in Na + and water in the canalicular lumen, with the consequent thickening of secretions.

8 0
2 years ago
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