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
rjkz [21]
3 years ago
13

Veins returning to the heart can close to prevent the backflow of blood. Which component in the veins contributes to this proces

s?
Biology
1 answer:
Sedbober [7]3 years ago
3 0
The valves are an aid to help prevent backflip and keep circulation a one-way system
You might be interested in
1. C3N2H4<br><br> 2. AIBr3<br><br> 3. C6H5F<br><br> 4. CrO3<br><br> 5. H2O2<br><br> 6.C12H22O11
MakcuM [25]
A. Organic compounds - C₃N₂H₄ , C₆H₅F and C₁₂H₂₂O₁₁

Organic compounds are compounds which have Carbon except few compounds such as carbon dioxide, cyanide. Other than Carbon, other elements also present such as Hydrogen, Oxygen and Nitrogen. But Carbon is considered as the main element of organic compounds. 

B. Inorganic substances - AIBr₃ , CrO₃ and <span>H</span>₂<span>O</span>₂

Inorganic substances are the compounds which do not own C-H bonds. Most inorganic compounds do not have carbon as their element except few. (Cyanides, carbon dioxide, carbon monoxide and so on are considered as inorganic although they have carbon).
6 0
3 years ago
Every living thing must reproduce to prove that they are alive
katrin [286]

Answer:

The correct answer is true.

Explanation:

The biologist has proposed few characters on the basis of which a living organism can be distinguished from non-living things like cellular organization, reproduction, heredity material, metabolism, homeostasis, growth and development.

For a living organism to maintain their continuity on the planet has to reproduce via asexual or sexual means through which its genetic material can be passed on to its offspring.

Thus, true is the correct answer.

8 0
3 years ago
Read 2 more answers
Why is an energy required for the passenger molecule to be carried across the cell membrane by the carrier molecule
anygoal [31]
Because energy is so powerful that it just carries along with it.

hope that helped.

5 0
3 years ago
How does the reproduction of seedless plants differ from that of seed plants?
juin [17]

Seedless plants produce spores.Spores can develop into an adult without fusing with another cell.Seed plants produce seeds.Seeds are formed when the female reproductive structure matures; this occurs after fertilization.

That is the answer (:

5 0
3 years ago
Read 2 more answers
Faça um texto de como acabar com a poluição mundial<br><br><br>pfvv rapido é pra hjj kkk
aliya0001 [1]

Answer:yes

Explanation:

because it helps

8 0
3 years ago
Other questions:
  • Which is a safe practice for handling chemicals in a lab investigation?
    15·2 answers
  • True or False. Lungs carry out excretory function.
    14·1 answer
  • Where does the exchange of oxygen, nutrients, and wastes occur?. a. in capillaries. b. in arteries. c. in the lungs. d. in the a
    11·1 answer
  • Where are the proteins for a cell made?
    14·2 answers
  • During refraction, waves bend when they pass from one medium to another. The waves refract because their ________ changes.
    14·2 answers
  • You have several hives of honeybees, Apis mellifera, that you keep in your backyard. Some bees uncap and remove dead larvae from
    10·1 answer
  • If a particular manufacturer emits less pollution than its allotted cap, It gets an extra allowance and can sell it to other man
    15·2 answers
  • What are some possible sources of air pollution
    12·2 answers
  • Which of the following is most likely an acid?<br> A. HCI<br> B. NaOH<br> C. Ba(OH)2<br> D. NH3
    8·1 answer
  • Which of the following is a biotic factor of the environment?
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!