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xz_007 [3.2K]
3 years ago
6

Ramer wants to find out how pressure affects the force of gravity acting on dust particles in a cloud. Ramer designs an experime

nt in which he places dust particles in a pressure chamber. He is able to adjust the pressure in the chamber from 0 Pascals to 780 Pascals. What should Ramer use as his control group?
Biology
1 answer:
Harman [31]3 years ago
4 0

Answer:

A vaccum should be used for the control group chamber.

Explanation:

In an experiment, a control is an experiment or observation designed to minimize the effects of variables other than the independent variable. The introduction of a control increases the reliability of the results; often through a comparison between the control measurements and the other measurements.

A vaccum according to this experiment is a chamber that will have no pressure within it. This will give a benchmark of the effect of pressure in this experiment.

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Upon centrifugation, particles sediment at different rates due to their physical properties. Tropomyosin is a rod-shaped protein
polet [3.4K]

Answer:

Elongated shape

Explanation:

Centrifugation separates molecules on the basis of angular motion.

Due to spherical shape, the value of 'f' is lesser for a spherical protien than the rod shaped one.

Hence the sedimentation coefficient for an elongated protien is 2.6S while htat of a spherical protien is 4.31S.

Hence its elongated shape results in slow centrifugation.

Some of the important principles of centrifugation are as follows :

  • The greater the mass, the more is the sedimentation rate i-e the one with greater mass will move down more rapidly as compared to the one with les mass.
  • Shape of particles also effect it, the rounder the particle, the lower frictional coeeficient.
  • Density of particles
  • Density of fluid
5 0
3 years ago
What is structure X?<br> A. Chromatin<br> B. chromosome<br> с. DNA<br> D. Chromatid
Anna35 [415]

Answer:

C

Explanation:

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6 0
3 years ago
Four factors that may lead to an increase of learners abusing substance in schools​
scZoUnD [109]

Answer:

4 reasons here:

Explanation:

1) Adventure; boredom causes them to look for excitement, even if it's detrimental to their health.

2) Peer pressure;research shows that risk-taking among teens doubles when peers are around.

3) media;easy to guess, shows a lot of risky behaviour in glamorous or admirable ways.

4) Poor self-esteem; bullying can lead to poor self-esteem and higher chance of the victim becoming depressed and taking substance to cope with the depression, also leads to err, self-death

5 0
3 years ago
Which hormone produces increases in size, especially in stem and fruits? auxin cytokinin gibberellin ethylene
Margaret [11]
Both auxin and cytokinin are used to increase size of stem and fruits
5 0
3 years ago
A milk snake looks similar to the deadly coral snake. This is an example of A) warning coloration adaptive radiation B) cryptic
Damm [24]
In this case, c) mimicry is the answer. In Batesian mimicry in which harmless animals mimic toxic animals. In this case, I assume the milk snake is harmless and the coral snake is venomous. Since the milk snake has a trait similar to deadly coral snake, less animals would eat it thinking it is dangerous. Over time all the milk snake that look like the deadly coral snake would survive leading to evolution by natural selection. This would lead to more and more milk snake mimicking the resemblance of the deadly coral snake.

a) The deadly coral snake has a warning color adaptive radiation. If the question had described the environment and how the snaked adapted to the environment via warning coloration. This would've been correct.

b) cryptic coloration is more about camouflage with the environment. If the question had state how a certain feature help one of the animals blend into the background. This would've been correct.

d) I'm not sure whats different between this and a so i'll consider them both the same.

3 0
3 years ago
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