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
daser333 [38]
3 years ago
12

What are index fossils and how can they be used to help find the relative age of the rock layers?

Biology
1 answer:
bagirrra123 [75]3 years ago
8 0

Answer:

Certain fossils, called index fossils, help geologists match rock layers. To be useful as an index fossil, a fossil must be widely distributed and represent a type of organism that existed for a brief time period.

You might be interested in
Which of the following is an example of an adaptation?
guajiro [1.7K]

Answer:

An adaptation is a trait an animal has, physical or behavioral, that helps it survive or act in unique ways.

5 0
2 years ago
How Earth, the moon, and the Sun move relative to one another.
ExtremeBDS [4]

Answer:

The sun, earth, and moon are held together by gravity, and they interact in lots of ways. The moon orbits the earth because of the pull of the earth. And the earth orbits the sun because of the pull of the sun. Because of the way they move relative to each other, we see phases and eclipses

4 0
3 years ago
Explain how the release of sodium and chlorine would lead to a loss of water in the intestines
frosja888 [35]

Answer:

Please find the explanation below

Explanation:

Sodium (Na) and Chlorine (Cl) are two electrolytes that play important role in the absorption of water and nutrients in the small intestine. However, as mentioned in the question, the release of sodium and chlorine would lead to a loss of water in the intestines. This is because of the OSMOTIC phenomenon.

Osmosis is the movement of water molecules from a region of high concentration of water/low concentration of solute to a region of low concentration of water/high concentration of solute via a semipermeable membrane. In this case, the Na+ and Cl- ions serve as the solutes, which when released out of the intestine causes the solution in the intestines to be HYPOTONIC compared to the intestinal environment. This causes an OSMOTIC GRADIENT.

This osmotic gradient i.e. difference in concentration provokes osmotic flow of water from the intestines, which has a low solute/high water concentration, to the outside of the intestines, which has a high solute/low water concentration. Hence, water is lost from the intestine because the solute concentration becomes low when sodium and chlorine ions are released.

3 0
3 years ago
What do organelles help form in the next level of organization
taurus [48]
Organelles exist within cells, which exist within tissues. Communities exist within ecosystems, which exist in the biosphere.
3 0
3 years ago
How do similarities in the bones of humans, dolphins, horses, and birds provide evidence for evolution?
Dafna11 [192]
The similarities between bones of humans and other animals shows that every living creature on earth has a common ancestor, even if that common ancestor is as simple as a sing-celled organism.
4 0
3 years ago
Read 2 more answers
Other questions:
  • Which does NOT affect a molecules ability to cross a cell membrane?
    11·2 answers
  • The plasma membrane is composed of a phospholipid bilayer with embedded proteins. What is one of the functions of the embedded p
    9·2 answers
  • In prokaryotes the single DNA chromosome is a covalently closed dsDNA circle.  Replication starts at the:
    15·1 answer
  • What is the special features of the rock chert?
    8·2 answers
  • WILL GIVE YOU BRAINIEST!!
    5·1 answer
  • This is Mohs hardness scale
    11·2 answers
  • Which of these terms describes the reaction of a plant to touch?
    7·2 answers
  • What is a tube like structure that runs through the compact bone is
    11·2 answers
  • What are 3 career pathways
    14·2 answers
  • PLS HELP! ILL GiVE BRAINLIEST!!! LI NK IS BELOW!! JUST COPY AND PASTE IT!!
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!