Saliva, produced by glands in the mouth, plays an important role in the digestion of food. Saliva contains a chemical, called amylase, that breaks down starch in the food we eat. A scientist conducts an experiment to investigate at which temperatures amylase works the best. He hypothesizes that the reaction will occur fastest if the amylase reaction is conducted near the normal human body temperature of 37ºC (degrees Celsius). In order to test his hypothesis, the scientist measures the reaction rate, which is how fast the amylase breaks down the starch at six different temperatures. The reaction rate is rated on a scale of 0 to 10, with 0 meaning no reaction and 10 meaning the fastest reaction. The results are recorded in the data table.

AMYLASE REACTION RATE BY TEMPERATURE

Temperature (ºC)

Reaction Rate

0

2

20 4
40 10
60 8
80 2
100 0
Based on the data, should the scientist accept or reject his hypothesis?
A He should reject the hypothesis because amylase reacts at all temperatures.
B He should accept the hypothesis because amylase reacts only at body temperature.
C He should reject the hypothesis because amylase reacts faster above body temperature.
D He should accept the hypothesis because amylase reacts fastest near normal human body temperature and slower above and below normal human body temperature.

Answers

Answer 1

Based on the data, he should accept the hypothesis because amylase reacts fastest near normal human body temperature and slower above and below normal human body temperature.

The correct option is C.

What is the rate of a reaction?

The rate of a reaction is the rate at which reactant molecules are used up or the rate at which products are formed.

In the body, the molecules that speed up the rate of the reaction occurring in the body are called enzymes.

Enzymes are mostly proteins and thus, are easily denatured by heat.

Enzymes function best at temperatures close to the body temperature of  37ºC (degrees Celsius).

An example of an enzyme is amylase found in saliva.

Amylase is responsible for the digestion of starchy foods.

Based on the results of the experiment conducted by the scientist, it can be concluded that his hypothesis is correct.

Learn more about enzymes at: https://brainly.com/question/14577353

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Need to subtract the 48N by 29N to get the resulting negative force of -19N

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Answer:

Caves normally apear black. Yes, this is because in a cave there are no natural sunlight or lights in a cave. For example, If your room was all dark it would look black...yes. Same with a cave! It will appear black as well. So, as you can see, Caves appear black because it is so very dark inside no lights nothing. So that is why it looks black.

Explanation:

Hope this helps!

None of this is copied or pasted!

Have a great day!!!

-Lea.

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YYPP
YyPP
yyPP
|YYPP
ҮyPp
ууРp
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Уурр


phenotype:

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Answer:

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Answer:gen z

Explanation:

Imagine a population of moths. White moths are easier for birds to see and eat. Black moths blend into their surroundings, so they are less visible to birds than white moths. As a result, black moths are more likely to survive and reproduce, enabling the gene for black coloration to be passed on to the next generation. This increases the frequency of genes for black coloration in the population. Which evolutionary process does this scenario describe

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Answer:

The correct answer is - natural selection.

Explanation:

Natural selection is a process of adapting according to the environmental change in order to survive and reproduce and increase their number. It is represented by Darwin for the first time. Natural selection leads to evolution.

In this case, White moths adapt according to the environment by increasing the population of black moths in order to blend with the surrounding and as the result, black moths are more likely to produce and survive and passed this trait to the next generation.

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Your body if you are fasting during the night is burning the extra fat to provide your body with energy

Answer:yo dada

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Answers

Answer:

Ninguna de las dos. No ocurre ni mitosis ni meiosis.

Probablemente haya ocurrido fisión binaria/bipartición.

Explanation:

En este caso estamos hablando de bacterias, organismos unicelulares procariotas. Estos tienen una forma de reproducción asexual denominado fisión binaria. Los eucariotas por su parte pasan por periodos de división celular implicada en el crecimiento denominado mitosis, y división celular implicada en reproducción sexual, denominada meiosis.

La fisión binaria, también conocida como bipartición, si bien muy parecida a la mitosis en algunos aspectos, es la forma de reproducción de las bacterias.

Ambas, mitosis y fisión binaria, implican un duplicado de material genético. El ADN se duplica y una copia va a cada célula hija. Lo mismo sucede con el resto del contenido celular. Finalmente ocurre citocinesis. Sin embargo, a diferencia de la bipartición, la mitosis requiere de mecanismos mucho mas complejos de duplicación celular e involucra también a la cariocinesis, ausente en bacterias.

La fisión binaria ocurre muy rápidamente, en un breve período de tiempo puede hallarse una diferencia considerable en la cantidad de células presentes en un sustrato, producto de esta división. Es por esto que el crecimiento que exhiben las bacterias como población, sigue un modelo exponencial.

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Answer:

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Answer:

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Answer:

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Explanation:

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Hello beautiful people on this earth.... I need some help asap please and thank you! :)
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Answers

Answer:

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Explanation:

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Answers

La respuesta correcta para esta pregunta abierta es la siguiente

A pesar de que no anexaste opciones o incisos para responder, podemos comentar lo siguiente.

El aparato digestivo de los cocodrilos, adaptado para ingerir una gran variedad de presas es una adaptación de tipo evolutivo morfológico.

Esto significa que a través de los años, la evolución de los cocodrilos los ha llevado a ajustar sus órganos, tal y como es el caso del aparato digestivo.

Esta capacidad de adaptación es una de las tantas maravillas de la naturaleza que permite la adaptación de los organismos de los animales a las necesidades que tienen y los hábitats donde viven, para que puedan sobrevivir cazando los tipos de animales que comen para poder sobrevivir en sus estados naturales.

The walls of the human heart are made of a specialized form of muscle tissue known as cardiac tissue. This cardiac, or heart, tissue contracts the chambers of the heart to cause rhythmical beating and blood circulation.


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nerves.

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blood.

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organs.

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please help meee

Answers

Answer:

d. cells

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Answer: c

Explanation:

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Answer:

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Explanation:

HELP!!! 50PTS!!! AND WILL BE MARKED BRAINLIEST!!!

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Answers

Answer:

I also think correct answer is a.

Answer:

a bacterium that uses inorganic materials to produce energy

Explanation:

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Answers

Answer:

B) Muscular system

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Answer:

most likely

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Answer:

1/4

Explanation:

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Geographic isolation plays a role in speciation
frem
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Answers

Answer:

adaptation

Explanation:

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