The table below shows some characteristics of three different types of muscles.

characteristics of different types of muscles

type a muscles
type b muscles
type c muscles
in involuntary motion
no
yes
yes
striations
yes
no
yes
tires quickly
yes
no
no

which type of muscle is type a? cite the evidence from the chart to support your answer.

type a are skeletal muscles, because skeletal muscles are the only voluntary type.
type a are skeletal muscles, because skeletal muscles are the only type with striations.
type a are smooth muscles, because smooth muscles tire quickly.
type a are smooth muscles, because smooth muscles do not have striations.

A option

Type A are skeletal muscles, because skeletal muscles are the only voluntary type.

Explanation:

There are three types of Muscles:

From the given table we have to identify which type of muscles are Type A. From the table we can list the following properties of Type A muscles:

These three characteristics belong to Skeletal muscles only. Therefore, option C and D cannot be correct.

Option A and option B both lists the skeletal muscles. Now we have to identify which of these is correct. Option B reads that skeletal muscles are only type with striations. This is incorrect as Cardiac Muscles are also without striations.

Hence option A is the correct answer as skeletal muscles are the only muscles that are voluntary muscles.

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.