BIOLOGY HIGH SCHOOL

Which blood vessel carries oxygenated blood to the heart
I need it urgently ​

Answers

Answer 1
Answer:

Answer: Pulmonary veins
The pulmonary veins bring oxygen-rich blood to the left atrium.

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Answer 2
Answer:

The blood vessel that carries oxygenated blood to the heart is the pulmonary vein. It transports the oxygen in the form of blood from the lungs back to the left atrium of the heart.

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A scientist tries to mate the two similar-looking fruit flies Drosophila melanogaster and Drosophila simulans. But he finds that they are unable to produce viable offspring. What kind of evolutionary barrier could this be?A.Chromosomal
B.Postzygotic
C.Physical

Answers

I would say that the kind of evolutionary barrier that this could be is B) postzygotic.
They can produce an offspring, but it can't be viable, meaning that it doesn't survive.
The kind of evolutionary barrier would be : B. Postzygotic

During postzygotic barrier, they do manage to produce offsprings. But that offspring do not has a fertile characteristic and tend not be able to survive and produce the next generation

hope this helps

What fact of reproduction limits the distribution of Bryophytes to habitats near water?

Answers

Bryophytes never form xylem tissue, the special lignin- containing, water-conducting tissue that is found in the sporophytes of all vascular plants.

In the new 6-kingdom system of classification, like the old 5-kingdom system, organisms are basically grouped by what is called

Answers

The correct answer for the question that is being presented above is this one: "Protista." In the new 6-kingdom system of classification, like the old 5-kingdom system, organisms are basically grouped by what is called Protista. Protista is the kingdom that contains anything that isn't classified as an animal, plant, fungi or bacteria.

Judy took some dead grass and soaked it in water for a few days. Then she looked at it under a microscope. She saw some tiny things moving around under the microscope. How could Judy tell whether what she was looking at were living things? Check all of the following that could be used to decide whether the things Judy saw were living. (

Answers

Answer:

Living Cells created from the dead grass

Explanation:

Because the water has nutrients.

To create a simulation of photosynthesis in a forest of 50,000 maple trees, a scientist needs to determine the average number of leaves on an actual maple tree. Which of the following is the best course of action for establishing this parameter?A. Determine the average number of leaves for 10 randomly selected maple trees.
B. Choose a value at random to represent the average number of leaves on a tree.
C. Count the number of leaves on a single tree and assume all trees are the same.
D. Divide the total number of leaves on all the trees in a forest by 50,000.

Answers

To create a simulation of photosynthesis in a forest of 50.000 maple trees, a scientist needs to determine the average number of leaves on an actual maple tree. The answer that is the best course of action for establishing this parameter is A) determine the average number of leaves for 10 randomly selected maple trees.

Answer:

A

Explanation:

____ immunity results when antibodies produced in another animal are introduced into your body.

Answers

Answer:

Passive

Explanation:

In addition to innate immunity and acquired immunity, there is a different type of immunity called passive immunity.

This arises when someone receives the antibodies from someone else for the purpose of preventing (or facing) an infectious disease.

While these antibodies last a few weeks or months, they have the benefit of providing immediate protection.

Examples of passive immunity:

- They are the maternal antibodies that babies receive through the placenta during pregnancy.

- Injection of antisera, produced in animals or other people, such as serum immuniglobulin for hepatitis and tetanus antitoxin.
this is called artificially acquired passive immunity
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