BIOLOGY HIGH SCHOOL

A stone held above the ground has potential energy. When the stone is dropped, potential energy is converted to _________ energy.a. chemical
b. thermal
c. electrical
d. kinetic

Answers

Answer 1
Answer: The answer is (D) kinetic. Potential energy is the energy that is stored in an object relevant to its vertical position. When you are holding a rock up high, it has its potential energy stored within it. Kinetic energy is the energy that the object has due to its motion, or the amount of work required to get an object from a point of rest to the point of its current velocity.
Answer 2
Answer:

Answer:

Kinetic

Explanation:

When a stone is held above the ground, its position gives it potential, or stored, energy. When the stone is dropped, the potential energy is converted to kinetic energy, or the energy of motion.

This is an example of the law of conservation of energy, which states that energy cannot be created or destroyed. It can, however, be converted from one form to another.

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Which best describes fertilization and meiosis in the life cycle of plants

Answers

The correct answer to the question above is that the fertilization produces a zygote, and meiosis produces haploid spores.The way that the fertilization produces the zygote, and on the other hand, the meiosis produces the haploid spores best describes the roles of it in the life cycle in plants. 

How are gills and lungs alike

Answers

Both the gills and the lungs are used to breathe
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Joel is comparing two slides showing chromosomes in a sperm cell and a skin cell of a dog. He finds that the sperm cell has 39 chromosomes. How many chromosomes can he expect in the skin cell?

Answers

Since a sperm cell contains half the number of chromosomes (a result of meiotic cellular division) as the body cells, the regular, diploid, cells would contain 78 chromosomes. You simply double the haploid to find the diploid or divide the diploid in half to find the haploid.

Answer:

B) 78 Chromosomes

Explanation:

Double of chromosomes in sperm cells.

Where are the oldest fossils found in the rock layers

Answers

The oldest layers are on the bottom, and the youngest layers are on the top.

The oldest layers are on the bottom, and the youngest layers are on the top. Because sediments sometimes include once-living organisms, sedimentary rock often contains a lot of fossils.

A scientist wants to prove that certain chemicals in cosmetics are likely to cause harm to developing fetuses, when used by a pregnant mother. What is the most likely limitation she will face in her scientific design?limitations due to the time required to complete the experiment

limitations due to the system being too large to investigate thoroughly

limitations due to high expenses for equipment and supplies

limitations due to ethical concerns about experimental subjects

Answers

The answer is limitations due to ethical concerns about experimental subjects. Because the certain chemicals still need to be proved whether it is harmful. So they can not ensure the safety of the fetuses of this pregnant mother.

Answer:

d

Explanation:

Over time, a tadpole changes into a frog. Has it evolved? No, because its genes are still the same.
No, because its body did not change enough.
Yes, because its structural form changed over time.
Yes, because its genes have changed.

Answers

Answer:

The correct answer would be "No because its genes are still the same".  

The process by which a tadpole changes into a frog is termed as metamorphosis, not evolution.

During this process, the physical transformation of an organism takes place through cell growth as well as cell differentiation.

No genetic transformation takes place and thus, no evolution takes place during this transformation.
No, because its genes are still the same. To evolvewould mean that the frog had one set of genes as a tadpole, then a different set as an adult. It just doesn't work that way. The genes are the same.
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