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Ivanshal [37]
4 years ago
14

Why do leaves change colors in the fall?

Biology
2 answers:
TiliK225 [7]4 years ago
8 0
The chlorophyll breaks down, the green color<span> disappears, and the yellow to orange </span>colors<span> become visible and give the </span>leaves<span> part of their </span>fall<span> splendor.</span>
Serhud [2]4 years ago
7 0

Answer: The correct answer is-

Leaves change colors in the fall because of the breakdown of green pigment called chlorophyll.

A green pigment (chlorophyll) is present in the leaves that is significant in the process of photosynthesis (formation of food using carbon dioxide and water in the presence of sunlight).

This pigment is broken down into small molecules during fall that results in the decoloration of leaves. The other pigments (such as carotenoid) exhibit their color on the leaves due to absence of chlorophyll.

In fall, the length of daylight is changed and there is an alternation in the temperature.

Leaves do not perform photosynthesis and change their color from green to orange or yellow due to lack of chlorophyll pigment.

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Billy is an 11-year-old boy who was admitted to hospital with dehydration. His parents said that over the last few months, he ha
mart [117]

Answer:

Billy  showed signs of type 1 diabetes.This is because,

1.His dehydration was from polyuria- excessive urination.

2. because of failure of his  pancreas to secrete insulin, for cellular utilization of glucose by beta cells-  he retains glucose in his  blood, and  lost  a lot of  glucose in his urine, thus water follow by osmosis, leading to polyuria causing dehydration.

His urge to replace lost glucose and fluids leads to great thirst polydipsia, another symptoms of type1. However, his  drop  in weight is  because, the solute concentration  of blood glucose is high due to lack  of  insulin.Therefore large amount is lost in the urine, with large volume of fluids leading to drop in  weight, and energy because cells lack glucose for biochemical reaction of energy production.

The dehydration leads to sunken eyes, loss of tissue turgor, and low fluid levels results in drop in blood pressure,-Hyportension.

Due to lack of glucose in the blood gluconeogensis sets in. Fats is converted to glucose by the liver  to supplement the lost glucose. The major by product of this reaction is a ketone-acetone. This explains the reason for the smell of acetone in his  breath.

2, The Test strip indicated large quantity of ketones. above ,3.0mmol/L .This is a confirmation of the Type 1 diabetes mellitus in Billy.As more fats molecules are broken down to glucose.

Explanation:

4 0
3 years ago
a bird is sitting in a tree flies away as you walked by. which of the life's characteristics explains the bird's behavior
MArishka [77]
The bird was frightened by the human as a defense mechanism it knows to fly away for safety. 
3 0
3 years ago
Read 2 more answers
The diagram shows a planet orbiting the Sun. Fill in each box with the statement that best describes each part of the diagram.
zaharov [31]

Answer:

direction of gravitational  pull of the Sun on the planet

Explanation:

A planet orbiting or revolving around the sun due to gravitational  force of the Sun on the planet which attracts the planet and compel the planets to move in a circular path. If this force of gravity is not applied on the planets, the planets will move in a straight line instead of circular direction so gravitational  pull of the Sun on the planet is very necessary for moving planets in a circular path.

8 0
3 years ago
Read 2 more answers
What is a non-example of diffusion?
prisoha [69]
<span>A non-example of diffusion is a brick.
Diffusion is termed as movement of molecules from a region of high concentration to a region of low concentration. A good example is how oxygen enters the body during external respiration which is referred to as breathing.
 Some of examples of diffusion are diffusion of mineral salt in the soil water into the root hairs cells. Diffusion of oxygen into the carbon dioxide and cell out of the cell in a unicellular like an amoeba, Diffusion of oxygen through the lungs and carbon dioxide out to the lungs of mammals.
 Diffusion of carbon dioxide and oxygen out by the leaf through the stomata.</span>
6 0
4 years ago
What are two main types of posttranscriptional modifications that take place in the mRNA of eukaryotes?The excision of the intro
Angelina_Jolie [31]

The correct answer is: The addition of a 7-mG cap at the 5' end of the transcript and the addition of a poly-A sequence at the 3' end of the message

These posttranscriptional processes are called:

• 5’ capping - It protects the mRNA from 5' degradation by exonucleases. Cap is also involved in ribosomal binding.

• Polyadenilation or addition of poly(A) tail – It also protects mRNA from degradation of 3’exonucleases.  A long poly(A) tail can also increase translation.

4 0
3 years ago
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