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
Zepler [3.9K]
3 years ago
8

which of the following is a type of circulatory system open closed both a and b or none of the above

Biology
1 answer:
padilas [110]3 years ago
6 0

Probably A and B #Brainiac

You might be interested in
Within a prey population, which of the following is most immediately affected by the arrival of a new predator?
Fudgin [204]
A predator normally kills its prey.So the death rate would be affected and thereby increase.
7 0
3 years ago
You do things to keep your body in balance every day. What things do you try to keep balanced in your everyday life?
olga nikolaevna [1]

Answer:

Stretches, Exercise, run 30 mins a day, eat healthy food like apples strawberries, drink water ,and sleep at the best time of the day around 9:30 or 10:26 pm

8 0
4 years ago
Actin filaments have polarity. This means that the two ends can be identified due to structural differences. The plus end is the
Alenkinab [10]

Answer:

C

Explanation:

Add radio labeled actin sub units to a mixture of actin filaments in which conditions are favorable for polymerization. This would enable you to identify the plus end of actin filaments.

Actin filaments are linear polymer of globular actin sub units Actin filaments have polarity. This means that the two ends can be identified due to structural differences.  

3 0
4 years ago
What happens to a developing child first?
riadik2000 [5.3K]
<span>The correct option is this: THE HEART BEGINS BEATING.
A fertilized egg takes about 40 weeks to reach full maturity. At week 5, the developing fetus resemble a tadpole; at this stage, the circulatory system has begin to form and the tiny heart has started beating and the baby is the size of a sesame seed. By week 6, the heart beat of the baby can fully be detected through scan.</span>
7 0
3 years ago
Read 2 more answers
Why is a person able to squeeze a clothespin more times if they exercise beforehand?
yanalaym [24]
<span>A person is able to squeeze a clothespin more times if they exercise beforehand because many body systems have been activated during the prior exercise. The respiratory system is activated providing increased oxygen to brain and other muscles. The circulatory system is activated to move blood from lungs and brain to the proper muscles. The brain has been activated to a mechanical task such as muscle movement.</span>
4 0
3 years ago
Other questions:
  • Is the possession of flagellated sperm a primitive or advanced characteristic in the plant kingdom?
    11·1 answer
  • __________ are membrane-bound metabolic compartments that specialize in the production of hydrogen peroxide (h2o2) and its conve
    11·1 answer
  • Can anyone possibly have answers for these
    11·1 answer
  • Which of the following statements is true of all genetically engineered organisms?
    13·1 answer
  • The border between the transparent edge of the cornea and the white of the fibrous sclera is the
    14·1 answer
  • Which of these refers specifically to a stiffening of the arteries, which in turn restricts blood flow?
    13·2 answers
  • What would happen in an ecosystem without herbivores
    6·2 answers
  • Think critically A restaurant owner wants to serve fresh-cut fruit. What factors might be considered in choosing a recipe and pr
    9·1 answer
  • How is energy related to the change of state represented by the model
    9·1 answer
  • What is the name of the green stuff in leaves?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!