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Strike441 [17]
3 years ago
13

A group of student set up an experiment to test the effects of exercise on the rate of cellular respiration. During the experime

nt, the students used a carbon dioxide indicator called Bromothymol Blue (BTB) to determine the amount of carbon dioxide produced by cellular respiration. The indicator changes from blue to green or yellow in the presence of carbon dioxide. Thus, the students measured the time it took for the color change to occur. Two trials were performed for each student. One before and one after exercise. During each trial, the students blew into the BTB solution with a plastic straw and measured how long it took for the color change to occur. Based on the data table below, what conclusions can be made about the effects of exercise on the rate of cellular respiration?
A: The data suggests that exercise decreases the rate of cellular respiration because more carbon dioxide was produced.

B:The data suggests that exercise increases the rate of cellular respiration because more carbon dioxide was produced.

C: The data suggests that exercise increases the rate of cellular respiration because less carbon dioxide was produced.

D: The data suggests that exercise decreases the rate of cellular respiration because less carbon dioxide was produced

Biology
2 answers:
9966 [12]3 years ago
5 0

The correct answer is B.)

Rzqust [24]3 years ago
4 0

The answer would be B:The data suggests that exercise increases the rate of cellular respiration because more carbon dioxide was produced.


The data has a consistently show that the time needed to change BTB color in after exercise group is much shorter(less than half) compared to before exercise group. If the time needed longer, this show that the amount carbon dioxide removed from the lungs is much higher. The reaction that provide energy for the muscle will produce carbon dioxide as side product in cellular respiration.


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❥SCIENCE SUBJECT
Fiesta28 [93]

9514 1404 393

Answer:

  • time: 1.122 seconds
  • range: 10.693 m
  • maximum height: 1.543 m

Explanation:

<u>Given</u>:

  runner is launched at 30° angle to horizontal at 11 m/s

  acceleration due to gravity is g = -9.8 m/s²

<u>Find</u>:

  runner's hang time

  runner's distance to the landing point

  runner's maximum height

<u>Solution</u>:

The (horizontal, vertical) speed components will be ...

  (11 m/s)(cos(30°), sin(30°)) = (5.5√3 m/s, 5.5 m/s)

The time of flight can be found from the height formula:

  h(t) = 1/2gt² +vt . . . . . . where v is the vertical speed at launch

The time we're concerned with is the time when h(t)=0 and t>0.

  0 = -4.9t^2 +5.5√3t = t(-4.9t +5.5√3)

The second factor is zero when ...

  t = (5.5√3)/4.9 ≈ 1.122 . . . seconds hang time

__

The distance to the landing point will be the product of horizontal speed and hang time:

  d = (5.5 m/s)(5.5√3/4.9 s) ≈ 10.693 m . . . . distance to landing

__

The maximum height can be found from the formula (based on conversion of kinetic energy to potential energy) ...

  h = v²/|2g| = (5.5 m/s)²/(2(9.8 m/s²)) ≈ 1.543 m . . . . maximum height

4 0
2 years ago
One way to reduce the shortage of food for a growing population would be
SpyIntel [72]

The most obvious way to reduce the shortage of food is to reduce population which seems like a long term effort however science has enables us to develop certain ways that could be used to reduce the shortage of food. We are familiar with the term genetically modified plants and animals.  

This technique has enabled us to produce plants and animals of our choice at a faster rate than normal.  

With the help of this we can put desirable traits in organisms.


3 0
3 years ago
If an rh-negative female conceives a child with an rh-positive male, what is the chance their fetus will be rh-positive?.
kaheart [24]

There is 50% chance of the child to be Rh-positive.

<h3>What is Rh factor?</h3>

Some red blood cells have a protein called a Rh factor. Person with this protein are called Rh-positive while those who don't have are called Rh-negative.

<h3>What will be the blood factor of the child?</h3>

When a Rh negative mother and Rh positive father have a child, the child has 50% chance of being Rh-positive. The child may receive the Rh factor from its father.

<h3>What is Rh incompatibility?</h3>

Your Rh factor blood type often doesn't pose a problem. Being Rh-negative during pregnancy, however, can cause issues if your unborn child is Rh-positive. When your blood and that of your child combine, your body will begin to produce antibodies that could harm your child's red blood cells. Your baby can experience other issues, such anemia, as a result of this.

Learn more about Rh factor here:

brainly.com/question/28189070

#SPJ4

7 0
2 years ago
State any eight point about China Rose.​
AnnZ [28]

Eight point about China Rose.

3 0
3 years ago
Compare the practices of shelterwood cutting, clearcutting, and seed-tree cutting.​
Kazeer [188]

Answer:

Clearcutting removes all the trees within a certain area at one time. Shelterwood cutting also removes all the trees in an area, but does it in stages over several years. Seed-tree cutting removes all the trees except for a select number of mature trees that can then reseed the area.

Explanation:

Hope that helps!

4 0
3 years ago
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