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
SOVA2 [1]
2 years ago
9

????? can someone help pls lol

Biology
2 answers:
Shkiper50 [21]2 years ago
8 0

Answer:

b

Explanation:

Mademuasel [1]2 years ago
3 0
D
Explanation: the blood vessel showed above has valves. Veins are the only ones that have valves.These valves prevent backflow of blood to the leg.
You might be interested in
Which of the following cell types is haploid
wolverine [178]
Haploid cells are sex cells or gametes.
7 0
3 years ago
Please help me. the first person to answer correctly will get a brainlist.
Rufina [12.5K]

Answer: NSF International

Explanation:

4 0
3 years ago
Read 2 more answers
Is a fruit a sink or a source and why?
nekit [7.7K]

Answer:

Producing and exporting organs in the plant (typically mature leaves) are known as sources, while non-photosynthetic organs (fruits, roots and tubers) and immature leaves are known as sinks.

Explanation:

4 0
3 years ago
Read 2 more answers
Clotting is necessary to mend breaks in circulatory vessels and to prevent extreme losses of blood, but it can also have detrime
Anestetic [448]

Answer:

Enhance: calcium ions, fibrinogen, serum, thrombin, tissue factor.

Inhibit: heparin, thrombin, coumadin, vitamin K8, PF3, aspirin.

Explanation:

Hope it helps.

3 0
3 years ago
What is the function of prolactin and progestrone?
chubhunter [2.5K]

Explanation:

Prolactin is a protein hormone of the anterior pituitary gland that was originally named for its ability to promote lactation in response to the suckling stimulus of hungry young mammals.

Progesterone is a hormone released by the corpus luteum in the ovary. It plays important roles in the menstrual cycle and in maintaining the early stages of pregnancy.

8 0
3 years ago
Other questions:
  • What risk do pests pose to consumers?
    13·1 answer
  • Movement of water on or near the surface of the water is called a deep current. Please select the best answer from the choices p
    11·2 answers
  • Scientists have detected an asteroid that is 700,000,000 km from Earth. About how many astronomical units is that?
    6·1 answer
  • The mass of an atom is contained primarily in its _____. A. Electron Shell B. Nucleus C. Proton D. Size
    12·2 answers
  • Which allele combination represents a female who has a heterozygous sex-linked trait?
    15·2 answers
  • Explain why evolution and natural selection are NOT the same thing.
    5·1 answer
  • In the crossing Aa x Aa, if A is the allele for pigment and a is the allele for albinism, what is the probability that the offsp
    14·2 answers
  • Respiration is a process where many chemical bonds inside the body break and release energy. This energy is used to perform vari
    10·1 answer
  • Why is glucose the first option for energy release? <br> Why not proteins or fats?
    7·2 answers
  • Imagine a species of coral reef fish that is threatened by both overfishing and pollution. Design an observational study (or pos
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!