TRUE or FALSE?
Changing one base letter on a mRNA codon
will always change the amino acid it codes for.
15. Why or why not?

Changing one base letter on a mRNA codon will always change the amino

acid it codes for.

A codon is referred to as a trinucleotide sequence found in DNA or RNA.

Each codon which is usually 61 number have a unique amino acids in which

they code for.

When one letter of the codon is changed, the amino acid in which it codes

for  will also be affected and changed.

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Which of the following statements best describes negative feedback loops?

A. They respond to changes with changes in the same direction, to move a value toward an endpoint.
B. They produce negative outcomes for the organism.
C. They aren't used often in maintaining homeostasis.
D. They respond to changes with changes in the opposite direction, to keep a value in the optimal range.

How does eukaryotic cells divide? A DNA replication, mitosis, cytokinesis B DNA replication, chromosome segregation, cytokinesis, C mitosis, meiosis, cytokinesis or D DNA replication, meiosis, cytokinesis

Gross production is the amount of energy left after cellular respiration.
ОТ
OF

6. Why does DNA condense during mitosis?

Which statement describes the Mercalli scale?

1 This scale measures seismic waves based on their size.
2 This scale rates an earthquake according to how much damage it causes.
3 This scale produces a single rating for earthquakes that reach the surface.
4 This scale measures the magnitude of an earthquake based on the size of seismic waves.

This organelle shrinks in response to 5% salt solution and grows in hypotonic solution:

Which describes bedrock?
o consists of solid rock
o lies directly above the soil layer
o does not contain weathered rock
o forms from decomposed material

I NEED SOMEONES HELP ON THIS QUESTION THE PICTURE IS ABOVE

Where is testosterone produced?
1-the thyroid gland
2-the testes
3- the ovaries

​

Which statement does NOT describe external regulatory proteins?
1 They respond to events occurring inside a cell.
2. Growth factors are one group of external regulatory proteins.
3. They can speed up or slow down the cell cycle.
4. Some can cause cells to slow down or stop their cell cycles.

WILL MARK YOU!!! HELP!
Where does sugar enter the blood?

it is an electrical conponents that limits or regulate the flow of electrical current is an electronic circuit​

whats the definition of photosynthesis?

living cells maintain a balance between materials entering and exiting the cell. their ability to maintain this balances called blank​

Process used to replace dead cells.

Which of the following is the proper order of the Linnaean system of classification starting at the most specific and moving up?
species, genus, family, order, class, kingdom, phylum
genus, species, order, family, class, phylum, kingdom
species, genus, family, order, class, phylum, kingdom
Species, genus, order, class, family, phylum, kingdom

1. What has to be added to a substance to cause a phase change?

2
If an organism has 15 chromosomes in a single sperm cell, how many
chromosomes would reside in its somatic cells?
O 15
O 30
0 7.5
45

First step of cellular respiration in which a molecule of glucose is broken into two molecules o
pyruvic acidTakes place in the cytoplasm. Yields 2 ATP.

1) Which of the following are the tiny hairs that filter the air that is inhaled, or breathed into the body?
A: Alveoli
B: Cilia
C: Bronchioles
D: Bronchi

2) Which of the following is referred to as the windpipe, which the inhaled air travels through to reach the lungs?
A: Trachea
B: Diaphragm
C: Bronchi
D: Cilia
3) Which of the following parts of the lungs allows air to be exchanged and then sent to the heart for distribution to the cells of the body?
A: Bronchi and bronchioles
B: Cilia and trachea
C: Alveoli and capillaries
D: Larynx and windpipe
4) Which of the following is another term for the voice box, which has vocal cords that vibrate when a person speaks?
A: Trachea
B: Throat
C: Diaphragm
D: Larynx
5) Which of the following are the tubes that enter the left lung and right lung, branching off from the trachea?
A: Bronchi
B: Bronchioles
C: Alveoli
D: Capillaries
6) Which of the following is the correct sequence for the air that travels from the nose or mouth, and eventually sending oxygen throughout the body?
A: Trachea, bronchioles, bronchi, alveoli, capillaries
B: Trachea, bronchi, bronchioles, alveoli, capillaries
C: Trachea, alveoli, capillaries, bronchi, bronchioles
D: Trachea, larynx, bronchi, bronchioles, alveoli

List which cell has the listed characteristics
1 Extensions
2 Matrix
3 No nucleus
4 Striated
5 Used in the immune system.

what is the meaning of ecotype and biotype.​

ncreased use of electricity has had a negative impact on the environment by
increasing
A. farmland
B. electric cars
c. air pollution
D. available food

If P is the dominant gene for straight hair trait and p is the recessive gene for curly hair, match the following

If a DNA sequence has 14 nucleotides what is the maximum number of amino acids that can be coded

HELPPPPPPP PLEASE QUESTION IS ABOVE

The skeletal system is the framework of the human body, comprised of bones, joints, and connective tissue. The integumentary system forms the largest system of the human body and is made up of skin, hair, nails and glands. How do the skeletal and integumentary systems work together to protect the human body?
A. The two systems initiate muscle contractions that protect the human body.

B. The two systems provide a barrier between the outside environment and the internal organs of the body.

C. The two systems initiate an immune response that protects the human body.

D. The two systems deliver signals between the outside environment and brain.

1) How is energy transferred from one organism to another?​

What is the process of transformation?

contains good bacteria that helps remove wastes