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
Alex73 [517]
3 years ago
6

I need help from 20-23

Biology
1 answer:
Mashcka [7]3 years ago
3 0
20. The answer is 1 (Precambrian)
21. The answer is 4 (Pennsylvanian)
22. The answer is 2 (Bony Fishes, Dinosaurs, and Mammals)
23. The answer is 2 (Reptiles)
You might be interested in
Which of the following is a direct result of deforestation? (4 points)
prohojiy [21]

The direct result of deforestation is habitat loss.

<h3>What is deforestation?</h3>

Deforestation is defined as the purposeful felling of trees which are used for domestic use and the space created is used for agricultural purposes

The direct impact of deforestation is the effect it has on the arboreal habitat. The animals that live on trees have their habitats destroyed.

Learn more about deforestation here:

brainly.com/question/579463

#SPJ1

3 0
2 years ago
What happens when a neurotransmitter binds to a receptor on the postsynaptic cell?
Grace [21]
<span>After release into the synaptic cleft, neurotransmitters interact with receptor proteins on the membrane of the postsynaptic cell, causing ionic channels on the membrane to either open or close. When these channels open, depolarization occurs, resulting in the initiation of another action potential</span>
3 0
3 years ago
Read 2 more answers
The shrimp in the photograph are small crustaceans, related to lobsters and crabs. Two shrimp. Photo by Russ Hopcroft, courtesy
DaniilM [7]

Answer:

Chitin

Explanation:

This glucose derivative is in fact the main building block of cell walls in not only arthropods (including the shrimp), but also fungi and insects, and also has a structural function in the scales of fish. The most similar commonly-known substance in terms of function is keratin, which makes up our hair and nails.

3 0
3 years ago
Read 2 more answers
Hich tendon is found within the intertubercular (bicipital) groove?
yanalaym [24]
The tendon of the long head of the biceps muscle 

http://anatomyzone.com/anatomy-feed/intertubercular-sulcus/
5 0
3 years ago
Which gases are found in the atmospheres of the gas glants?
irakobra [83]

Explanation:

Dioxide , Nitrogen, Oxygen, Sodium , Hydrogen , Helium

and others.

6 0
3 years ago
Other questions:
  • How does phospholipid structure relate to the selective permeability of the plasma membrane? A critical feature of the plasma me
    10·1 answer
  • What is activation energy?
    7·2 answers
  • Offspring that result from crosses between parents with different traits are called
    8·1 answer
  • The Taj Mahal in India is made of pure white marble. It is slowly losing its white color because of pollutants from vehicles and
    8·2 answers
  • Which sentence describes a possible impact of early hunter – gatherer societies on the environment?
    6·2 answers
  • What statement summarizes the law of segregation
    14·1 answer
  • A house cost $120,000 when it was purchased. The value of the house increases by 10% each year. Find the rate of growth each mon
    6·1 answer
  • Hallux rigidus is a condition affecting what part of the body?
    5·1 answer
  • Murder Mystery in wexford
    7·2 answers
  • Study the food web above. The proliferation of which organism would MOST negatively affect food production for
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!