BIOLOGY HIGH SCHOOL

Which is a part of the cell theory? cells come from pre-existing cells cells have a nucleus organisms with one cell must be seen with a microscope organisms must have more than one cell to live

Answers

Answer 1
Answer:

A part of the cell theory is cells come from pre-existing cells. The correct option is A.

What is the cell theory?

The cell theory is the conclusion of many scientists. There are three postulates of the cell theory. They are: all organisms are made up of cells. New cells are made up of old cells, and the cell is the basic structural and functional unit of life.

The cell is the smallest and basic unit of life. All functions of the body are performed by cells. It contains a cell organelle that has different functions and structures.

A nucleus is present in the cell and microscopic organs must have a single cell, they are not a part of cell theory, this is more related to the organism, not cells.

Thus, the correct option is A. cells come from pre-existing cells.

To learn more about the cell theory, refer to the link:

brainly.com/question/1468725

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Answer 2
Answer:

Answer:

Cells come from pre-existing cells

Explanation:

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If a moon were discovered to be at 1.5AU from the sun, it would be how far from the sun in kilometers? A. 22,500km
B.225,000km
C.22,500,000km
D.225,000,000km

Answers

The answer is (D.) 225, 000, 000 km

AU means astronomical unit. It is used by the astronomers to measure large distances in the Solar System. 1 AU is the average distance from Sun to Earth which is 149, 598, 000 km.

So to get the km value of 1.5 AU.

1.5 x 149, 598, 000 = 224, 397, 000

Round off to 225, 000, 000

Answer: D. 225,000,000km

Explanation:

An Astronomical Unit is the average distance between the Earth and the Sun. It is a unit of length which is used to measure distances in our galaxy.

1 astronomical unit is approximately equal to 150 million kilometers. 1 million is 10^6.

Thus  1 Astronomical unit (AU)  is equal to 150 million km or 150* 10^6km

So 1.5 Astronomical unit (AU)=(150* 10^6)/(1)* 1.5=225* 10^6km=225000000km

Thus correct option is D.

The reflex that causes an infant to close its fist when the palm is touched is called the _______ reflex.

Answers

Moro. The reflex is called the Moro Reflex.

How do eukaryotes replicate their genomes in a reasonable time frame, even though their DNA molecules are often considerably larger than those of bacteria?

Answers

Answer: All chromosomes replicate once in a cell cycle

Explanation :

DNA replication is the action of DNA polymerases synthesizing a DNA strand that is complementary to the original strand or template strand.

In eukaryotes, it is during the S phase of the cell cycle that the vast majority of DNA synthesis occur and the entire genome uncoil and divide to form two daughter cells or copies while In Bacteria, replication begins at the origin of replication, supercoiled DNA is unwound by DNA gyrase, made single-stranded by helicase, and bound by single-stranded binding protein to maintain its single-stranded state.

In Eukaryotic DNA replication. all chromosomes replicate once in a cell cycle and Replication begins at many origins along each chromosome, this is why genome replication of eukaryotes occurs faster than those of bacteteria even thouge their DNA molecules are larger than the DNA molecules of Bacteria.

Minerals found in the B horizon were dissolved in water and carried there by a process called ____.a. oxidation
c. weathering
b. leaching
d. littering

Answers

The correct answer for the question that is being presented above is this one: "b. leaching." Minerals found in the B horizon were dissolved in water and carried there by a process called leaching. Leaching refers to the loss or extraction of certain materials from a carrier into a liquid .

Answer;

b. leaching

Minerals found in the B horizon were dissolved in water and carried there by a process called leaching

Explanation;

  • Leaching is the process in which minerals are dissolved in water and carried down in a soil profile.
  • Leaching occurs as a result of heavy rainfall, high temperature and percolation, which leads to loss of mineral and organic solutes.
  • The process occurs when air spaces in soil become filled with water and gravity begins to move water downward. Some soils such as Laterite soils develop due as a result of leaching.

20. Neutrons and
are found in the nucleus of an atom. (1 point)

Answers

You know that neutrons are found in the nucleus of an atom. Under normal conditions, protons and neutrons stick together in the nucleus. During radioactive decay, they may be knocked out of there. Neutron numbers are able to change the mass of atoms, because they weigh about as much as a proton and electron together.

When air at the surface diverges, airflow above must__

Answers

converge, regardless of hemisphere

Answer:

: When the air at the surface diverges, it means that, above, the air sinks and that is called, a subsidence, the opposite of a convection. It happens when the atmospheric pressure is high and it diverges from the ground towards regions of lesser pressure,

Explanation:
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