A Triple beam balance determines the mass of a paper clip to be 2 g. Is that an observation or inference?

Some people worry that the increasing number of cell phones will cause cancer because of the energy of the radio waves they emit

-BARSIC- [3]

Answer:

No.

Explanation:

There is no clear evidence which indicates that cell phones will cause cancer because they emit very low intensity of radio waves but it can cause other diseases. Diseases such as brain tumor, male infertility and ear hearing function can be adversely affected by using cell phones due to the radio wave they emit. So we can say that cell phones will not the cause of cancer disease.

7 0

3 years ago

Read 2 more answers

Isovolumetric relaxation and ventricular filling (two phases of the cardiac cycle) take place during __________. Isovolumetric r

Helga [31]

Answer:

Option B, ventricular diastole

Explanation:

Ventricular diastole also termed as ventricular relaxation consists of two phases. In the first phase, the following set of events takes place –

a) Relaxation of ventricle muscles

b) Reduction in pressure of blood within the ventricles

c) As this reduced blood pressure gets lower than that of pressure with in the pulmonary trunk and aorta, blood starts flowing back towards the heart.

d) A small dip in the blood pressure is observed at this stage

e) Volume at this stage remains constant as the atrioventricular valves remain closed

f) This phase is known as isovolumic ventricular relaxation phase

In the second phase, the following set of events takes place –

a) Relaxation of ventricular muscle

b) Dropping of pressure of the blood within the ventricles lower than that of pressure of blood in the atria

c) Blood starts flowing from atria into the ventricles thereby opening the tricuspid and mitral valves

d) Both the heart chambers chambers are in diastole,

e) Atrioventricular valves are open

f) Semilunar valves remain closed

Hence, option B is correct

3 0

4 years ago

What is one condition that must be met for a population to be in genetic equilibrium

Sphinxa [80]

<h2>Answer:</h2>

The one condition that must be met for a population to be in genetic equilibrium:

A Large Breeding Population.

<h3>Explanation:</h3>

A large breeding population helps to ensure that chance alone does not disrupt genetic equilibrium.
In a small population, only a few copies of a certain allele may exist.
If for some chance reason the organisms with that allele do not reproduce successfully, the allelic frequency will change.

4 0

4 years ago

Pea flowers may be purple (P) or white (p). Pea seeds may be round (R) or wrinkled (r). What proportion of the offspring form a

Alexus [3.1K]

Answer:

3/16

Explanation:

The following is the punnet square which represents the probabilities of offsprings being produced for this cross:

PR Pr pR pr

PR PPRR PPRr PpRR PpRr

Pr PPRr PPrr PpRr Pprr

pR PpRR PpRr ppRR ppRr

pr PpRr Pprr ppRr pprr

This cross shows that the probability of the offsprings to have white flowers and rounded seeds would be 3/16.

3 0

3 years ago

Did Darwin first believe that each finch he found was a different species?

Neko [114]

No, Darwin did not believe that they were different species.

The differences in the finches proved his theory of evolution to be likely. The finches evolved based on traits that fit their environment. The different finches were the same species, however, their traits differed based on their environment.

4 0

3 years ago