BIOLOGY HIGH SCHOOL

A liquid that is being heated at Lakesha’s lab table catches fire. Which action should Lakesha take first?

Answers

Answer 1
Answer:

Explanation:

It is advised that when we work in a laboratory then we should do experiments under the supervision of our guide or teacher.

Hence, when a liquid that is being heated at Lakesha’s lab table catches fire then she should immediately tell this to her teacher so that proper precaution on time can be taken.

Answer 2
Answer: If she is in school she should alert the teacher so that futher actions can be taken and you should maybe pull the fire alarm and evacuate the area just in case there are any harmful chemicals .

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What roles do membrane proteins play in making the cell membrane selectively permeable

Answers

Protein channels cover cell membranes, they choose which molecules can enter and exit the cell. If the molecule is tiny enough to fit in these protein channels, it will be allowed to pass through. If not, the molecule needs to form a vesicle so it can easily go through and out the cell.

Which of the following do all cells in a multicellular organism have in common?1. They all express the same genes.

2. They all have the same proteins.

3. They all have the same mRNA.

4. They all have the same DNA.

Answers

The correct answer is (d) They all have the same DNA.

  • All the multicellular organisms have same DNA but the different parts of the body has different gene expression.
  • For example: the same DNA is found in the cells of kidney and liver, but the gene expression for liver results in large number of hepatocytes and the same DNA in the kidney will give rise to nephrons.
  • This proves that all the cells in the multicellular organisms have same DNA but their expression of protein in different cells are different.

One factor that can increase sensitivity to sunlight is genetics.
a. True
b. False

Answers

The answer is true. If someone is born with blue eyes, then they are more susceptible to sunlight than someone with lighter eyes. The same idea applies to skin tone. Fair skinned people burn easier than those with darker skin.

Answer:

a. True

Explanation:

Which lists metric units, in order, from smallest to largest?kilogram, hectogram, decagram
decagram, decigram, centigram
milligram, centigram, decigram
decagram, hectogram, milligram

Answers

Answer:

milligrams, centigrams, decigrams, kilograms, decagram,hectogram

Explanation:

Answer:

milligram, centigram, decigram

Explanation:

Could someone help me with this?

Answers

1. Starch

2. Hydrogen peroxide and oxygen

Through which microscope were cells first observed?simple microscope
tunneling microscope
compound light microscope
electron microscope

Answers

Cells were first observed through a simple microscope, which is the first option, as Antonie van Leeuwenhoek, a Dutch scientist, used a simple microscope that he designed and built himself to observe and describe microscopic organisms.

What is a microscope?

The history of the microscope goes back several centuries, with various scientists and inventors contributing to its development. One of the most notable figures in the history of microscopy is Antonie van Leeuwenhoek, who is considered the father of microbiology. He was a Dutch tradesman and amateur scientist who lived in the 17th century, and he was the first person to observe and describe microscopic organisms. Leeuwenhoek's microscope was a simple microscope, which means that it had only one lens. The lens was a small, spherical bead of glass that was mounted on a metal plate. 

Hence, cells were first observed through a simple microscope, which is the first option.

Learn more about the microscope here.

brainly.com/question/2370856

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Answer:

Simple microscope

Explanation:
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