Which statement about cystic fibrosis is true?
A.) Cystic fibrosis is caused by a deletion of one codon in the DNA molecule.
B.) Cystic fibrosis affects a person's ability to make normal red blood cells.
C.) Carriers have an advantage over people who do not have the cystic fibrosis mutation.
D.) Cystic fibrosis is caused by a mutation in which a dominant allele replaces a recessive allele.​

Answer:D

Explanation:

It only make sense.

the biceps brachii–radius arrangement represents a __________-class lever system.

Question 1 (1 point)
Which of the following is NOT something that can cause your core temperature to change?

Question 1 options:

Fevers caused by disease


Enzymes denaturing in your cells


When the external temperature gets really hot or cold


Energy produced by your muscles when you exercise

Question 2 (1 point)
Why is it so important to maintain a core temperature of 37°C?

Question 2 options:

Your core temperature doesn't stay at 37°C, it will actually change and reflect the temperature outside.


Your body can only make cells at 37°C, and we need cells because that is what our body is made of.


It is just best to keep that temperature so you don't shiver or sweat.


The enzymes in our cells work best at this temperature and these enzymes are needed to carry out all the reactions that happen in our body to keep us alive.

Question 3 (1 point)
What happens to your enzymes when they get too hot?

Question 3 options:

The enzymes denature and the active site alters, so the substrate can't fit in there properly and chemical reactions don't happen as fast.


The enzyme changes shape, but the substrate still fits in and the chemical reaction can still take place.


The enzyme dissolves and the pieces then need to be rebuilt before they can be used again.


Nothing, the enzyme can handle temperature changes in the body.

Question 4 (1 point)
Which organ is super important in helping you in both conserving heat and cooling your off?

Question 4 options:

Skeletal System


Excretory System


Respiratory System


Integumentary (Skin) System

Question 5 (1 point)
The __________ is the temperature-regulating center of the brain and can detect temperature changes to the blood as it flows through the brain.

Question 5 options:

Skin


Hypothalamus


Nervous system


Thymus

Question 6 (1 point)
Which of the following best describes how your muscular and skin systems work to warm you up if you get too cold?

Question 6 options:

Your muscles begin to contract fast and this movement helps you warm up


Small erector muscles work to raise the hairs on your skin. This helps trap the air close to the skin, goose bumps appear and the air acts as an insulator


blood vessels narrow keeping the blood away from the skin to keep you warm


Sweat glands release sweat to ensure you stay the proper temperature

Question 7 (1 point)
Which of the following best describes how your circulatory and skin systems work together to cool you off when you get too hot?

Question 7 options:

Your blood vessels (capillaries) dilate allowing blood to flow near the surface of your skin. This allows the heat to be released through your skin to help you cool off.


You begin to sweat which leaves salt on your skin after the sweat evaporates.


The hairs on your skin will lie flat to allow better evaporation of sweat and to allow the heat to be released into the air


Goose bumps show up to help your muscles contract to help cool you off

Question 8 (1 point)
If your core temperature falls too low, it is called __________________

Question 8 options:

hyperthermia


thermoregulation


hypothermia


dehydration

Question 9 (1 point)
Extreme tiredness and lethargy (slow, not moving much) are the first signs of someone experiencing hypothermia?

Question 9 options:
True
False
Question 10 (1 point)
When people exercise in hot weather, which of the following could happen?

Question 10 options:

People can acclimate to the hotter conditions over time producing more sweat that has lower salt levels


Homeostasis, this could cause their blood sugar levels to rise


Excessive sweating can lead to dehydration and heat stroke. Drinking lots of water can help prevent this situation from happening


Both A and C

Explain how the model of the chemical reaction above demonstrates that matter is conserved.

List two characteristics of Coelenterata and Nematoda each.​

Outline the four stages of the demographic transition as it occurred in Europe and North America.

Think of another common object around your house or school that you could use to model a cell. Describe the object. Based on its characteristics, does the object best model an animal cell, a plant cell, or a bacteria cell? Why?

Where does cellular respiration occur? (1 point)
O chlorophyll
O mitochondria
O bacteria
O lungs

During exercise, our body loses a lot of water. Why do people who exercise need to drink water before feeling thirsty?​

Which of these best describes a climax community?

a. a forest of hardwood trees

b. a mixture of pine trees and oak trees

c. trees that are all mature

d. depends on the biome

the information in dna is contained in __________.

Define the term peristalsis and explain why is it so important

ribozymes are rna molecules that have enzymatic activity. this conflicts with the belief of early molecular biologists that

organisms that cannot make their own food are called

Describe the structures of Kidney​

Which one is the most venomous snake in the world​

Where does the energy come from to power passive and active transport?​

which ventricles are divided by the septum pellucidum?

PLZ HELP ASAP(giving 80 points):
2. Write a micro-theme(short paragraph [100-300 words]) using and explaining the following terms.
a. "Survival of the fittest"
b. Adaptation
c. Evolution

the nucleic acid sequence in mrna is determined by:

If a hom.ozygous white horse [tex]C^WC^W[/tex] and a hom.ozygous black horse [tex]C^BC^B[/tex] are bred together, what is the likelihood that their offspring will be roan with both colors represented in their hair if this gene follows a codominant inheritance pattern?
A.) 50%
B.) 25%
C.) 100%
D.) 0%

Why is nitrogen a vital element to biotic factors?

Grouper or a type of fish that often wait until they are around 20 years old to reproduce based on this group or could be considered

Why are restricted-use land regulations more effective at reducing destructive use of forests?

They allow fossil fuel exploration.
They allow grazing of livestock.
They prevent hunting and fishing.
They protect land from human development.

what is biology term for something covered with ribosomes and modifies protiens

Please help !! 100pts
1.
Which of the following best summarizes why the technological invention of microscopes was important to biology?
It created public interest and support for research.
It created a means of funding for cell research.
It allowed for development of the cell theory.
It proved that cells could form spontaneously.
2.
Which of the following best compares the structures found in plant cells and animal cells?
Plant cells have rigid cell walls and do not contain mitochondria or ribosomes while animal cells do.
Plant cells contain rough endoplasmic reticulum and a Golgi apparatus while animal cells contain smooth endoplasmic reticulum surrounded by lysosomes.
Animal cells do not contain chloroplasts, cell walls, or a large central vacuole while plant cells do.
Animal cells contain cell walls and a large central vacuole while plant cells contain cell membranes and many small vacuoles.
3.
Which equation describes what happens in photosynthesis?
CO2 + O2 + H20 + energy → CH2O5
6CO2 + 6H2O + energy → C6H12O6 + 6O2
C6H12O6 + 6O2 → 6CO2 + 6H2O + energy
C6H12O6 + H20 → CO2 + energy
4.
Early elements of the cell theory followed soon after the development of Hooke’s light microscope. What does this relationship suggest about the evolution of the cell theory since Hooke?
Progress on the cell theory was delayed by a lack of technological progress.
Scientists needed to focus less on cells and more on microscope development.
Isolated scientists contributed pieces of the cell theory to form the whole.
Improvements in technology are closely related to changes in the cell theory.
5.
Oxygen is a product of photosynthesis. The primary role of this oxygen in cellular respiration is to
combine with lactate, forming pyruvate.
combine with carbon, forming CO2.
yield energy in the form of ATP as it is passed down the respiratory chain.
act as an acceptor for electrons and hydrogen, forming water.
6.
Some proteins catalyze biochemical reactions. If a genetic defect prevented a protein catalyst from being produced, which of the following do you predict would happen in the cell?
The reverse reaction of the one the protein catalyzes would begin to proceed.
The reaction the protein catalyzes would only occur in some places in the cell.
The cell would find a different type of protein to catalyze the reaction.
The reaction the protein catalyzes would proceed very slowly or not at all.
7.
Which statement best compares a eukaryote and a prokaryote?
Eukaryotes use active transport to move substances across the cell membrane, while prokaryotes use facilitated diffusion.
Eukaryotes have membrane-bound organelles, while prokaryotes have few specialized structures.
Eukaryotes use flagella to move themselves through substances, while prokaryotes are not able to move.
Eukaryotes have a cell wall, while prokaryotes have a cell membrane.
8.
What are the reactants for cellular respiration?
H2O and O2
Glucose and O2
Glucose and CO2
H2O and CO2
9.
Which of the following best compares the membranes found in different types of cells?
Animal cells have cell membranes and cell walls, but plant cells do not have cell membranes.
Prokaryotes and eukaryotes both have cell membranes, but eukaryotes also have membrane-¬‐bound organelles.
Animal cells have membrane-¬‐bound organelles, while plant cells carry out the functions necessary for life in the cytoplasm.
Prokaryotes have only cell membranes, while eukaryotes have both cell walls and cell membranes.
10.
Which of the following characteristics defines a cell as a eukaryote?
Having ribosomes
Being able to move
Having a nucleus
Being able to reproduce
11.
Water has a much higher specific heat than most other covalent compounds. What do you predict might happen if water had a low specific heat instead?
Harmful organisms living in water would reproduce at a rapid rate.
Organisms that are sensitive to changes in temperature would die.
Flooding would occur and animals would be forced to migrate.
Plants would not have enough water to effectively carry out photosynthesis.
12.
Which of the following best describes a result of the polar nature of water molecules?
Ionic compounds dissolve easily in water.
The volume of water decreases by nearly half when it is frozen.
Water molecules repel each other.
Water molecules repel most other substances.

Scientists have observed a gradual increase in temperatures in locations all across Earth, an event often called . The increase in temperature is one aspect of , a long-term change in weather patterns.

model of a cell cycle

Which process must occur for a muscle to be able to relax?
ОА
The amount of ATP in the neuromuscular junction must increase.
ОВ.
Myosin and actin must attach to each other.
OC. A nerve must initiate an action potential in the muscle fiber.
OD
The concentration of calcium in the myofibril must decrease.
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What is the molecule in this image?
Nucleic acid
A protein
A lipid
A carbohydrate

7. A hen's egg with the shell dissolved is placed in a 10% salt solution. Relative
to the interior of the egg the salt solution is
A. Hypotonic
B. Isotonic
C. Hypertonic
D. Semi-permeable