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
Anna35 [415]
3 years ago
14

A student is studying water fleas and measuring their heart rates as the number of beats per second. What type of data is he rec

ording?
Biology
1 answer:
Natali [406]3 years ago
5 0
Quantitative data because quantitative uses numbers.
You might be interested in
3. Which is not a particle within an atom?
Svet_ta [14]
Ellen de gene res. nerd
8 0
3 years ago
Read 2 more answers
Solar system included all of the following except what?
inna [77]

Answer: Stars?

Explanation: I think it is stars because there is only one star in our solar system. I don't know for sure if it is, but I think it is. Don't be too sure of my answer.

3 0
3 years ago
The advantage of a closed circulatory system over an open circulatory system is that
Ber [7]
Hello friend!!

Circulation-<span>is the movement of substances such as nutrients and gases within blood vessels and cavities throughout the body.

</span>

Not all animals have a circulatory system.                                                      Poriferans, cnidarians, platyhelminthes and nematodes (nematodes have pseudocoelom fluid but no vessels) are avascular animals. Echinoderms do not have true circulatory systems either.

In animals that do not contain a circulatory system, the transport of substances occurs by cell to cell diffusion.

Blood is a fundamental means of substance transport for larger animals since, in these animals, tissues are distant from each other and from the environment thus making diffusion impossible.

Circulatory systems can be classified into open circulatory systems and closed circulatory systems.

An open circulatory system is one in which blood does not circulate only inside blood vessels but also flows into cavities that irrigate tissues. In open circulatory systems, blood pressure is low and generally the blood (called hemolymph) has a low level of cellularity.

Arthropods, molluscs (cephalopods are exception) and protochordates have open circulatory systems.


A closed circulatory system is one in which blood circulates only inside blood vessels. For this reason, the blood pressure is higher in animals with closed circulatory systems. The cellularity of the blood is also higher, with many specific blood cells.

Closed circulatory systems are a feature of annelids, cephalopod molluscs and vertebrates

A closed circulatory system is more efficient. Since blood circulates only inside blood vessels, it has a higher pressure and, as a result, can travel greater distances to the organs where hematosis happens and to peripheral tissues. In addition, the higher circulatory speed increases the animal’s capacity to distribute large supplies of oxygen to tissues that consume it in large amounts, such as muscle tissues, which can then perform faster movements. Animals with an open circulatory system (with the exception of insects, which carry out gas exchange separately from circulation) are generally slower and have a low metabolic rate.


<span>In insects, the circulatory system is open but this system does not participate in the gas exchange process or in oxygen supply to tissues. Gases enter and exit through the independent tracheal system, which allows for the direct contact of cells with the ambient air. Therefore, an insect can supply the large oxygen demand of its fast-beating wing muscles even though it has an open circulatory system.</span>

<span>
</span>

<span>Hope It helps!!</span>

<span>All the Best!!</span>

7 0
3 years ago
A DNA sequence reads: TACGATCATATT. Which of the following is the correct complementary DNA strand?
Vedmedyk [2.9K]
Answer: a. ATGCTAGTATAA
7 0
3 years ago
Which of these materials are organic? (Select all that apply.)
Verizon [17]

Answer:

All of them

Explanation:

3 0
2 years ago
Other questions:
  • Select all that apply
    11·2 answers
  • First case of using two words as a scientific name
    15·1 answer
  • Explain how sustainability is dependent on the ecological footprint
    14·1 answer
  • Which term describes an area where sugars are used or stored?
    14·1 answer
  • What is the exchange of gases between the lungs and the blood?
    11·1 answer
  • I wonder if fish and marine mammals drink salty water
    13·2 answers
  • 4. The conditions of weather are part of
    11·2 answers
  • The Super-Volcano erupts in Yellowstone National Park. Lava, ash, etc. devastates 2/3 of the USA leaving newly cooled rock
    14·1 answer
  • HELP THIS IS DUE TODAY I WILL MARK U AS THE BRAINLIEST ANSWER!!
    14·2 answers
  • Write a description of the feeding relationship on the lines below .include descriptions of which organisms are producers , omni
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!