BIOLOGY HIGH SCHOOL

Rain forests cover just 6 percent of the Earth’s land surface, yet they contain _____ percent of Earth’s species.

Answers

Answer 1
Answer: rain forests contain 70 percent of Earth's species.
Answer 2
Answer: yes 70% of earths species are in the rain forest

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Why omnivores may not Always stay un the Same trophic level?

Answers

no because organisms such as humans are omnivores they can eat both meat and plants and may act as 1st,2nd or 3rd level heterotroph.

what fossil evidence indicates that evolutionary change may have occurred within a time frame known as gradualism

Answers

The fossil record ! Hope it helps! 

Answer:

Phylogeny

Explanation:

What will most likely be a result if all of the mitochondria are removed from a plant cell?

Answers

Since the mitochondria is the powerhouse of the cell, it will most likely die.
The plant will die because it will not have no energy. There will be nothing breaking down waste in the cell.

To test the effect of hormones on plant growth, six potted plant seedlings of the same species were measured and then sprayed with auxin (a growth hormone). After four weeks of growth under ideal conditions, the plants were measured again. To set up a proper control for this experiment, the investigator should what do?

Answers

Answer:

The investigator needs to add a negative and a positive control. The positive control can be an auxin previously tested on this plant species, and the negative control should be a NON AUXIN SPRAYED plant, it can be sprayed with disstilled water. It is importan that all these plants are exactly under the same conditions (temperature, light, etc.), but with a distance between them that does not allow crossed contamination.

Explanation:

Final answer:

In this experiment, the investigator should establish a control by growing the same plant species without the auxin under the same conditions. This allows them to compare plant development with and without the growth hormone, verifying its effect.

Explanation:

To set up a proper control for this experiment, the investigator should maintain another set of six potted plant seedlings of the same species but without spraying them with auxin. These plants will then be grown under the same ideal conditions for the same duration. This control group will allow the investigator to compare the growth and development of plants without the hormone against those with the hormone, demonstrating any effects the growth hormone may have had.

Controls in experiments like these are crucial because they assist in determining the specificity of the effects of the variables being tested, in this case, the plant hormones. Without a control group, it would be impossible to definitively assign any observed changes to the application of auxin.

Learn more about Control in Experiments here:

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Which are the physical (P), chemical (C), and biological (B) immune responses?P: complement system; C: saliva; B: coughing
P: coughing; C: saliva; B: complement system
P: coughing; C: sneezing; B: complement system
P: complement system; C: saliva; B: sneezing

Answers

The answer is P: coughing; C: saliva; B: complement system.

Coughing is a physical immune response because it mechanically (physically) removes irritants and pathogens from the lungs. Sneezing is also the physical immune response.
Saliva is a chemical immune response because it contains different enzymes able to break down pathogens.
Complement system is a biological immune response because it activates biological molecules, such as antibodies, to remove pathogens from the organism.

Answer:

B)P: coughing; C: saliva; B: complement system. would be your answer

Is there two characteristics of a plant cell if it is then tell me pls

Answers

Answer:Chloroplasts and a cell wall,

Chloroplasts for gathering energy and a cell wall to protect the cell are both unique features of plant cells in comparison to animal cells

Answer:

there is actually three characteristic in a plant cell.

Explanation:

Plant cells have a cell wall, a large central vacuole, and plastids such as chloroplasts. The cell wall is a rigid layer that is found outside the cell membrane and surrounds the cell, providing structural support and protection The vacuous maintains turgid pressure against the cell wall.

Hope this helps : )
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Which occurs during translation? A.mRNA is created by using a DNA template. B.mRNA codons are joined by tRNA anticodons to assemble amino acids to form a protein. C.Protein is formed when a polypeptide chain is broken apart and released from ribosome. D.One strand of DNA is copied into a strand of rRNA.