answer.
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
romanna [79]
2 years ago
14

Why do the circulatory systems of land vertebrates have separate circuits to the lungs and to the rest of the body?

Biology
1 answer:
marissa [1.9K]2 years ago
5 0

Answer:

Because it prevents venous blood from mixing with arterial blood (which is rich in oxygen), in this way the circulation is more efficient.

Explanation:

In land vertebrates, the blood circulation is structured in two independent circuits: the pulmonary circulation, where oxygenation of the blood occurs and the elimination of the carbonic anhydride that it contains, returning back to the heart through its left atrium; and the systemic or major circulation, impelled from the left ventricle, transports the oxygenated blood and the nutrients that it assimilates as it passes through the digestive system, to the tissues of the animal, where it is charged again with anhydride carbonic and other waste substances, returning back to the heart, where it enters through the right atrium. These systems are independent and prevents venous blood (which is poor in oxygen) from mixing with arterial blood. These systems are independent and prevents venous blood (which is poor in oxygen) from mixing with arterial blood.

You might be interested in
Read each of the sentences that describe a phase of meiosis. Place each sentence into the correct box.
Ksivusya [100]
Can you show the picture of the question please?
5 0
2 years ago
Lana is studying the deer that live in a forest. She concludes that all of the deer are members of the same
yKpoI14uk [10]

Lana concludes that all of the deer in a forest are members of the same (geosphere / ecosystem / species / hydrosphere) because they look alike and breed with one another. She observes how the deer (population / community / ecosystem / biosphere) interacts with trees, wolves, and other living things of the forest (population / community / species / geosphere).

Answer:

1.  Species

2.  population

3.  community

Explanation:

Given the available options. Here is the correct or full text that matches with the correct meanings.

Lana is studying the deer that lives in a forest. She concludes that all of the deer are members of the same SPECIES because they look alike and breed with one another. Next, she observes how the deer POPULATION interacts with trees, wolves, and other living things of the forest COMMUNITY

7 0
2 years ago
Listed in the Item Bank are individual steps that need to be ordered. To find out more information about steps, some have more d
Archy [21]
1. DNA unzips in the nucleus.
RNA polymerase binds to the DNA sequence, separates the two strands and creates a single-stranded DNA molecule that will be transcripted. 

2. Transcription occurs.
Transcription is the first step of gene expression. During this process, a gene's DNA sequence is copied and a mRNA molecule is produced.

3. mRNA moves to the ribosome
The mRNA is then transferred from the nucleus to the ribosome, the organelle that serves as a site for protein synthesis.

4. Translation occurs
Translation is the process where a mRNA sequence into the amino acid sequence of a polypeptide (protein).

5. Protein assembled at ribosome.
Translation, meaning the formation of a protein, occurs on the ribosome.
8 0
2 years ago
Read 2 more answers
Angiosperms, flowering plants, and gymnosperms, cone-bearing plants, reproduce using egg, sperm, and produce seeds. In gymnosper
Mnenie [13.5K]

The most common way these trees undergo pollination is through seeds and pollen.

The pollination is done with help of wind and birds where pollen transform from one plant to another.

<u>Explanation:</u>

The plants that undergoes pollination process through the seeds that are present in it are called as Angiosperms. These contains fruits. The seeds are usually present inside these fruits. Flowering plants are also called as Angiosperms.

These fruits and flowers are absent in gymnosperm. Even then they contain seeds inside the leaves surface. They will undergo pollination with these naked seeds. It is the fruits, flowers and the endosperm that are present in the seeds that help us to find difference between these two.  The only common thing that exists between these two are seeds and pollen with which they pollinate.

In gymnosperms, pollen is transferred from male cone to female cone through wind or birds. Now, the pollen is germinated into pollen tubes and sperm for egg fertilization.

3 0
2 years ago
Describe your DNA model. Which part do the straws represent? The pushpins? The paper clips and the black dots you made with the
Fynjy0 [20]
<h2>Answer 1 with Explanation</h2>

The DNA model represents the genetic code that defines all the characteristics of a living thing and it is made up molecules called nucleotides. Each nucleotide contains and represents a phosphate group, a nitrogen base, and a sugar group. Two long strands are formed by Nucleotides attached together to create a structure called double helix which looks like a ladder, the sides would be made up of sugar and phosphate molecules while the rungs would be the base. The straws represent the sugar-phosphate backbone which forms the structural framework of nucleic acids. It is composed of alternating sugar and phosphate groups.  

<h2>Answer 2 with Explanation</h2>

The push pins re-presence nitrogen-containing base is an essential molecule with a nitrogen atom having the chemical features of a field. The principal biological purpose of a nitrogenous base is to bond nucleic acids collectively. A pushpin owes its essential characteristics to a solitary couple of electrons of a nitrogen atom. It is assigned as the derivatives pair of parent compounds.

<h2>Answer 3 with Explanation</h2>

The paper clips represent ‘five prime’ and ‘three prime’ which indicate the number of carbons in the DNA’s sugar backbone. These two are the distinctive ends of the nucleic acids. The black dots represent the bonds of sugar and phosphate which make up the nucleotides and show the genetic code. These bonds have strong covalent bonds that keep the bonds attached together firmly.

8 0
2 years ago
Other questions:
  • Why is it important for scientists to be able to remove DNA from an organism? List two reasons
    9·1 answer
  • Carlos is conducting an investigation in which he changes one variable and measures how it affects another. He also has one grou
    11·2 answers
  • Vanda's genetic makeup is composed of thousands of genes in which some are expressed and directly observable, while some are not
    5·1 answer
  • What are three ways synthetic polymers affect the environment? Some synthetic polymers use materials from Earth that are nonrene
    15·1 answer
  • When a double helix of dna is replicated, two complete helices are formed. together, these helices are called sister __________?
    14·1 answer
  • The cell model below shows 2 solutions separated by a selectively permeable membrane indicated by the red dashed line.
    10·1 answer
  • Carbohydrates are the primary source of energy for the human body. If your body lacks enzymes that break down carbohydrates, it
    14·2 answers
  • Rapid defibrillation is a link in the adult chain of survival. Why is this important to survival?
    6·2 answers
  • Where 99% of photosynthesis occurs
    6·1 answer
  • One strand of a DNA molecule has the base sequence AGACCT. The complementary base sequence on the other strand of DNA will be __
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!