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
Anna11 [10]
3 years ago
15

Which of the following body systems do both roundworms and flatworms lack?

Biology
2 answers:
lesantik [10]3 years ago
8 0
I think the answer may be D. But don’t answer yet, I may be wrong.
andrew11 [14]3 years ago
4 0

Answer:

the correct answer is option A.

Explanation:

Roundworms and flatworms cells are close to the animal's outer surface which help them absorbtion. Both roundworm and flatworm use diffusion to respire and for circulation of substances around their body.

They lack circular muscles so only way to undulate is from side to side. They does not need to circulate oxygen they simply diffuse it from skin.

Thus, the correct answer is option A.

You might be interested in
"what is the relationship between the motor neuron axons and muscle fibers"
fomenos
Motor neurons carry impulses to the effectors in the body, which are the muscles or glands that produce a change based on a stimulus sensed by the receptors. The motor neurons "innervate" muscle fibers, which essentially means that they cause them to move. The fewer the muscle fibers associated with a motor neuron, the more precise are the movements of those fibers. Having to control a small number of fibers, the neuron is able to coordinate more dexterous motions. An example of a region where there are not a lot of muscle fibers related to each neuron is in your fingers.
6 0
3 years ago
In red blood cells, the compound carbonic anhydrase increases the rate at which the reaction of carbon dioxide being converted t
Lilit [14]

Answer:

hey buddy I gess It will help you

Carbon dioxide is transported in the blood from the tissue to the lungs in three ways:1 (i) dissolved in solution; (ii) buffered with water as carbonic acid; (iii) bound to proteins, particularly haemoglobin. Approximately 75% of carbon dioxide is transport in the red blood cell and 25% in the plasma.

3 0
3 years ago
The patella is a(n) _____________bone found in the ___________________. (2 points)
alexandr402 [8]
Long; appendicular skeleton
7 0
2 years ago
Read 2 more answers
Which of the following is an important function of selenium
mylen [45]

Answer: Selenium is important for reproduction, thyroid gland function, DNA production, and protecting the body from damage caused by free radicals and from infection

Explanation:

Selenium is important for reproduction, thyroid gland function, DNA production, and protecting the body from damage caused by free radicals and from infection.

7 0
3 years ago
How does climate change happen
tiny-mole [99]
Climate change happens by the circle of life
7 0
3 years ago
Read 2 more answers
Other questions:
  • Are the elements in Figure 6-2 metals or nonmetals?
    9·1 answer
  • Which characteristics best identify differences between intrusive and extrusive rocks?
    15·2 answers
  • Help me pls pls pls
    10·2 answers
  • Plants that encourage the proliferation of nitrogen-fixing bacteria are _____.
    10·1 answer
  • Choose the best description for the prokaryotic cells.
    10·2 answers
  • What are the subunits of nucleic acids?
    11·1 answer
  • As you walk to physics class, you start out at a speed of 2 m/s, for a time of 120 seconds (you’re really excited to get to clas
    6·1 answer
  • Dr. Sanchez and her team have observed an unusual star in the Andromeda galaxy. Their data suggests that the star is being consu
    13·1 answer
  • Please help mee thanksssss
    15·2 answers
  • How does desertification affect the productivity of soil?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!