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zubka84 [21]
3 years ago
9

Which of the following statements is true?

Biology
1 answer:
kondaur [170]3 years ago
6 0

Answer:

Bacteria and protozoa are the examples of unicellular organisms.

Explanation:

Unicellular are the organisms which madeup of single cell such as bacteria and protozoa. Bacteria are prokaryotic organisms i. e. no true nucleus. Some bacteria make their own food from photosynthesis and some bacteria are parasites and other are decomposers.

Protozoa are eukaryotic organisms which are heterotrophic in nature i. e. feed on other organisms. Amoeba and paramecium are the examples of protozoa.

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Why is the use of stem cells so controversial?
ICE Princess25 [194]
Stem cells are undifferentiated cells that could develop to perform a variety of tasks. One type of stem cell is the embrionic stem cell. There are also adult stem cells. To use embrionic stem cell you need to have fertilized embrios. These can be donated to research. The use of the embrionic stem cells is controversial for this reason.
3 0
3 years ago
The systems of the body work together and are dependent upon one another. Explain how another system, besides the skeletal syste
Nimfa-mama [501]

Active muscles demand huge amounts of oxygen, and the circulatory system works hard to provide it. Blood carries oxygen to the muscles. When the body is at rest, blood carries nutrients to the muscles so that they can repair and rebuild themselves. Blood also carries away the waste products that hard-working muscles produce, back out through the lungs to be filtered.

so they Circulatory system xx muscular system :)

5 0
3 years ago
In rabbits, black fur is dominant to white fur.
Fudgin [204]

Crossing a BB male with a Bb female:

The Punnett Square will look like this:

BB BB

Bb Bb

The percentage will be as follows:

- You will have 50% homozygous dominant (BB)

- You will have 50% heterozygous (Bb)

Now, for the phenotype, you will have 100% black fur, since B is dominant and is prevalent in 100% of all the breeds.

For the genotype, you have 50% BB and 50% Bb

4 0
3 years ago
The production of red blood cells is regulated by a feedback loop involving erythropoietin. In non-disease states, the productio
LuckyWell [14K]

Answer:

Negative feedback.

Explanation:

The production of erythropoietin by the liver and kidneys is a negative feedback because with the production of erythropoietin, our body tends to move to become more stable state. The erythropoietin is produced by the liver and kidneys to increase the production of red blood cells if the quantity of red blood cells are lower than the normal range. If the number of red blood cells are decreases the oxygen level in our body is low that leads to unstable condition of the body but when the concentration of red blood cells increases, the body move towards stability.

5 0
3 years ago
The number of protons within an atom of an element is equal to its atomic mass true or false
Marta_Voda [28]
False, atomic mass is the weighted average mass of an atom of an element based on the relative natural abundance of that element's isotopes
8 0
3 years ago
Read 2 more answers
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