1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
const2013 [10]
3 years ago
10

An atom contains 70 protons, 70 electrons, and 99 neutrons. what is the mass number?

Biology
1 answer:
Mrac [35]3 years ago
6 0
How bout you try adding the numbers up or adding the two 70s then subtracting the 99
You might be interested in
Both primary and secondary active transport depend directly on _______ to move substances across a cell membrane.
Kay [80]
The answer is carrier proteins
7 0
2 years ago
In the Susan Solomon, Web of Science article, what does the reader uncover in the abstract?
kow [346]

Answer:

the conclusive evidence about CFCs (chlorofluorocarbons) and the ozone layer of the earth.

Explanation:

Susan Solomon, Web of Science article reveals the conclusive evidence that CFCs (chlorofluorocarbons) could be destroying the protective layer of ozone in the earth’s upper atmosphere. CFCs are compounds that have the potential to destroy the protective layer of ozone (an oxygen compound) in the earth’s upper atmosphere.

7 0
3 years ago
How can we use rocks to determine how an area used to look in the past?
Kamila [148]
Through looking at layers of rock you can tell what kind of things transpired. If you find Fish fossils you can assume that at one point in time, there may have been a body of water of some sort. if you find certain plants, you can deduce that there was a forest or a grassy pasture. Or if there are variations in the layer you may be able to tell what kind of soil was there at one point in time, or maybe if there is volcanic rock, you could rightly assume there was a volcanic eruption at some point.
8 0
3 years ago
These animals all have similar
ladessa [460]
I would say C but I’m not too sure.
4 0
3 years ago
Muscle tissues are characterized by the presence of elongated cells, often called ____________ , that can contract to create mov
PtichkaEL [24]

Answer:

1. Muscle Fibers

2. Bones

3. Joints

Explanation:

Muscle tissue is made of muscle fibers. The plasma membrane of a muscle fiber is called sarcolemma while its cytoplasm is known as sarcoplasm. Muscle cells are characterized by the presence of specialized endoplasmic reticulum which is called sarcoplasmic reticulum.

Muscle cells exhibit contractility and extensibility. The ability of muscle cells to shorten their length forcibly in response to a stimulus is their contractility. Muscle fibers have the ability to extend and shorten themselves.

Extension and contraction of muscle fibers are responsible for the movement of the human body and its parts.

Muscles are attached to bones via tendons which in turn are the fibrous connective tissues. Muscles are also part of our joints where they assist in the movement by pulling the bones as well as stabilize and strengthen the joints.

7 0
3 years ago
Read 2 more answers
Other questions:
  • Do you think cloning of pets is acceptable? explain
    9·1 answer
  • A father has dimples, the mother does not have dimples, and all four of their children have dimples. Dimples (D) are dominant ov
    15·1 answer
  • How many pairs of spinal nerves are there?
    11·1 answer
  • The structure labeled X in the figure above is a
    13·2 answers
  • Cancer can result from disruptions in cell cycle control. Mutations that increase the production of EGFR have been associated wi
    10·1 answer
  • If a lipid bilayer is at least 108 times less permeable to K ions than it is to water, how do the K ions that are needed for man
    11·1 answer
  • Where does the process of chemical digestion begins?
    7·2 answers
  • In digestion why do some food molecules decrease by the same amount that others increase.
    11·2 answers
  • Mention the effect of mosquito and write down what can be done to control it.​
    8·1 answer
  • Recessive disorders related to genes found on the X chromosome but not on the Y are more commonly expressed in ________
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!