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Andrew [12]
2 years ago
5

The following specimens/slides were shown to the students: mushroom, moss, earthworm, volvox, bacteria. The teacher asked them t

o classify them into the five kingdoms.
Biology
1 answer:
nlexa [21]2 years ago
4 0

Answer:

Mushroom-Kingdom Fungi

Moss-Kingdom Plantae

Earthworm-Kingdom Animalia

Volvox-Kingdom Protista

Bacteria-Kingdom Monera

Explanation:

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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>

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

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

7 0
3 years ago
Why do people call DNA the genetic code and how does it work?
Degger [83]

Answer:

Genetic code is the term we use for the way that the four bases of DNA--the A, C, G, and Ts--are strung together in a way that the cellular machinery, the ribosome, can read them and turn them into a protein. In the genetic code, each three nucleotides in a row count as a triplet and code for a single amino acid. Genetic code. The genetic code is the set of rules by which information encoded in genetic material (DNA or RNA sequences) is translated into proteins (amino acid sequences) by living cells. ... Those genes that code for proteins are composed of tri-nucleotide units called codons, each coding for a single amino acid. DNA contains the instructions needed for an organism to develop, survive and reproduce. To carry out these functions, DNA sequences must be converted into messages that can be used to produce proteins, which are the complex molecules that do most of the work in our bodies.

Explanation:

4 0
3 years ago
Read 2 more answers
All of the living and nonliving things in a given area that interact with one another make a an
alexandr402 [8]
Ecosystem

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6 0
3 years ago
1 point
astra-53 [7]
The answer is b) ribosomes
5 0
3 years ago
Read 2 more answers
Which of the following is true regarding brain development and aging?
notka56 [123]

Answer:

a,c and d

Explanation:

- brain becomes smaller and lighter with age and although in absence of disease, it retains its structure and function.

- the brain shrinks, it pulls away from from the skull and the amount of amount of space between brain and skull doubles between 20 to 70 years of age.

- Blood flow reduces within the brain , which also uses less oxygen and glucose.

Hence, options a, c and d are correct.

7 0
3 years ago
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