Which animal has tracheae but no lungs for respiration? A. cardinal B. grasshopper C. toad D. tuna

Answers

Answer 1
Answer: Cardinals, grasshoppers and toads all have lungs for respiration. Tuna do not.

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What does expenditure mean?

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Depending on the use of the word in the sentence, expenditure can mean:
A.    The manner in which you spend funds- this is how the funds are spent. Usually with sentences like “The expenditure of funds was so disappointing and sudden.”
B.    The amount of the money you spend- this is the money you give in exchange for goods and/or services that you agreed when paying. Expenditures can be evidenced by various documents such us receipts, invoices, and other vouchers. “Let us reduce our expenditure.” Would be a good example.

The euglena's red eyespot is used for _____. detection of danger detection of light photosynthesis binary fission

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Answer:

Detection of Light

Explanation:

One of the newest applications of cell technology is called cybrid embryos. This process involves replacing the nuclear material of an animal cell with human nuclear material. How might this process affect public policies about research by using stem cells?

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In this type of research, human nuclear materials are used therefore it shall apply the same policies and concerns about the use of human embryonic stem cells (hESC). 

Many scientists are frustrated because their work has been at a standstill due to laws about stem cell research. Some of these laws ban the use of such application like the Dickey Amendment.

Answer: A. The same policies and concerns about the use of human embryonic stem cells would most likely apply.

Explanation:

2. The four main systems of the Earth are

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the geosphere, the hydrosphere, the atmosphere, and the biosphere

In a scientific investigation, what is the name for a prediction that can be tested?conclusion
evidence
hypothesis
verification

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The answer is hypothesis
Hypothesis i think. Hope this helped

What biomolecule has involvement in the immune system

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An antigen is a biomolecule, such as a protein or sugar, that binds to a specific antibody. An antibody/antigen interaction may stimulate an immune response. Not every biomolecule is antigenic and not all antigens produce an immune response. B cells are the major cell type involved in the humoral immune response.

Final answer:

The key biomolecule involved in the immune system is a protein known as an antibody. These are produced by B cells and help the immune system recognize and destroy foreign substances like bacteria or viruses.

Explanation:

The biomolecule that has significant involvement in the immune system is a group of proteins known as antibodies or immunoglobulins. These antibodies are produced by certain types of white blood cells (B cells). They play a crucial role in the immune response by recognizing and binding to specific antigens such as bacteria or viruses, enabling other parts of the immune system to destroy these foreign substances more effectively. For example, if a person becomes infected with a virus, the immune system will produce antibodies specific to that virus. Once these antibodies attach to the virus, they basically mark it for destruction by other cells in the immune system.

Learn more about Antibodies here:

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