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
zheka24 [161]
3 years ago
12

Which two of these characteristics are examples of endoskeletons?

Biology
2 answers:
Sunny_sXe [5.5K]3 years ago
4 0
I believe it is C) calcium-rich plates echinoderms and B) bones in mammals like vertebral 
tensa zangetsu [6.8K]3 years ago
3 0

Answer:  

Option B and option C are correct.

Explanation:

Endoskeleton - An internal support structure or skeleton is on the inside of a body, composed of calcium or mineralized tissue.

B. Bones in mammals - are endoskeleton, it supports the body in its shape.

C. Calcium-rich plates in echinoderms are acts like exoskeletons but most of the cases a thin tissue surround skeleton so it is an endoskeleton.

You might be interested in
A string of lights in a series circuit is not working. Which of the following is most likely the cause?
Brums [2.3K]

Answer:

A. A light burned out and "opened" the circuit

Explanation:

In a parallel circuit if a light bulb goes out the rest are fine because they each have independent routes to the battery. But in a series circuit when a light bulb goes out the rest goes out because the current is going in one pathway. To tell the difference of if it closed or opened the circuit, you have to know what they mean. Closing a circuit means a complete electrical connection, the  light bulbs will light and electricity will flow. Opening a circuit means the opposite. If the all the light bulbs have stopped working then the circuit is not complete, therefore it's open.

3 0
3 years ago
Read 2 more answers
Like all cells, the neurons' internal organization dictates its function. Neurons have relatively many mitochondria, an extensiv
vovikov84 [41]

Answer:

B) neurons have stable, relatively unchanging internal environments.

Explanation:

Rough endoplasmic reticulum (RER) is studded with ribosomes which in turn serve as the site for protein synthesis. A cell with an extensive network of rough endoplasmic reticulum has higher rates of protein synthesis. Mitochondria are the powerhouse of cells and serve as the site for aerobic cellular respiration. A large number of ATP molecules are produced in mitochondria. Therefore, a cell with relatively many mitochondria appears to have a higher demand for ATP and higher consumption of oxygen.

A cell with higher rates of consumption of ATP and protein synthesis should be functionally active. The charge across the membrane and the internal concentration of ions such as Na+, K+ of a neuron keep on changing during the conduction of nerve impulse. Therefore, the presence of many mitochondria and RER does not indicate that the neurons maintain relatively constant internal conditions.

7 0
3 years ago
A(n _______ supplies organisms with the food, energy, and other resources needed to live.
storchak [24]
The correct answer is an Ecosystem Hope this helps
7 0
3 years ago
Read 2 more answers
The roots of a plant growing downward in a response to gravity is an example of a ________.
Salsk061 [2.6K]
<span>geotropism (also calles gravitropism)</span>
8 0
3 years ago
Read 2 more answers
Who first proposed the principle of the heliocentric theory?
vredina [299]
Hello Mlevintova, <span>Who first proposed the principle of the heliocentric theory, </span>Aristarchus of Samos was an ancient Greek astronomer and mathematician who presented the first known model that placed the Sun at the center of the known universe with the Earth revolving around it.

8 0
3 years ago
Read 2 more answers
Other questions:
  • You should dedicate _______ of your dinner plate to protein-rich foods.
    5·2 answers
  • Define the environment
    14·1 answer
  • How is a problem statement and hypothesis connected
    9·1 answer
  • The greatest source of moisture entering the atmosphere is evaporation from the surface of _____________.
    14·1 answer
  • Please help me on this thank you so much
    8·2 answers
  • Which two hormones closely control levels of calcium in the blood?
    5·2 answers
  • The Himalayas in central Asia are the tallest mountains in the world. But fossils of seashells can be found high in these mounta
    6·1 answer
  • A scientist disagrees with the official data provided about the world fish catch.
    6·1 answer
  • Name 5 things that shape a watershed
    9·1 answer
  • HELP!! photosynthesis and cellular respiration basics venn diagram
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!