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
slavikrds [6]
2 years ago
15

Dr. Schweitzer found structures identical to modern red blood cells and blood vessels inside the bone. Which organ system do blo

od cells and blood vessels belong to? A. circulatory system B. nervous system C. respiratory system D. skeletal system ​
Biology
1 answer:
Marizza181 [45]2 years ago
4 0

Answer:

A. Circulatory system

Explanation:

Circulatory system consist of heart,blood cells&blood vessels

You might be interested in
As you hike from the base of a mountain to the top of a mountain, you would expect see decreasing levels of biodiversity.
AURORKA [14]
True - An extensive chain of mountains or mountain ranges, especially the principal mountain system of a continent.
8 0
3 years ago
Explain why your model improves upon the student’s original model. How would your model help someone who was learning about phot
lora16 [44]

Answer:

Determine how many groups you will have.  

Prepare ping-pong balls.  

Collect egg cartons.  

Prepare the egg cartons.  

Prepare “energy tokens.”  

 Post signs in the classroom.  

 Prepare filled H20 and C02 “molecules.”

Explanation:

Photosynthesis occurs in two stages. In the first stage, light-dependent reactions or light reactions capture the energy of light and use it to make the energy-storage molecules ATP and NADPH. During the second stage, the light-independent reactions use these products to capture and reduce carbon dioxide.

8 0
2 years ago
Read 2 more answers
Pls help it’s due todayyyy
Alexxx [7]

Answer:

the number of protons, neutron and electron for a neutral atom of nitrogen is p:7E:7N:7

4 0
3 years ago
Which descriptions of evolution are accurate? Check all that apply. It occurs within an individual’s lifetime. It occurs over ma
erik [133]
<h3><u>Answer;</u></h3>

It occurs over many generations.

It happens at the genetic level.

<h3><u>Explanation</u>;</h3>
  • <em><u>Evolution is the process that involves change in the inherited traits of a population over generations. </u></em>
  • <em><u>The traits involved are the expressions of genes that are copied and passed from the parents to the offspring during reproduction process. Mutations in these genes results to new traits and thus heritable differences among organisms.</u></em>
  • <em><u>Therefore, evolution will only occur when there is change in gene frequency within a population over a given period of time. Genetic differences that are heritable are passed to the next generation.</u></em>

8 0
3 years ago
Read 2 more answers
Which of these triangle pairs can be mapped to each other using a translation and a rotation about point A?
ICE Princess25 [194]

Answer:

I can only see the very first one and it only needs a rotation. Can you add pics of the others.

Explanation:

6 0
3 years ago
Read 2 more answers
Other questions:
  • What is a cell that has only one single set of chromatids
    13·2 answers
  • What is the function of a diagram in a film camera
    9·1 answer
  • Look at your data tables. List the cubes in order from largest to smallest. Then list them again in order of the surface area-to
    9·2 answers
  • By which process are fossil fuels formed?
    9·2 answers
  • A bear sharpening its claws on a tree is a good example of a bear adapting to its environment.
    11·2 answers
  • Explain why scientists believe the Abert’s and Kaibab squirrels are examples of speciation.
    10·2 answers
  • 3 main stages of translation
    11·1 answer
  • Explain what factors can lead to genetic<br> variation within a population.
    10·1 answer
  • When scientists talk about something's nature, they are talking about its
    11·1 answer
  • ____ is the number and variety of species present in any biological community.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!