What is a reflex?

Question 3 options:

Similar nerve cells grouped together in a nervous system.


A focused, conscious decision to send a signal to a body part.


Part of the nervous system that connects the sensory receptors to the muscles.


Behavior that does not involve the forebrain, or "higher" centers of an animal's brain.

Answers

Answer 1

Answer:

B

Explanation:

i took the test lollll


Related Questions

Is extreme temperature effect on an enzyme reversible?

Answers

Answer:

apidly reversible active-inactive transition

Explanation:

Incubators are used In hospitals to care for premature babies

Answers

Answer:

The answer would be C!

Explanation:

I hope this helps

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Which of the solutions
indicates a higher
concentration of solutes than
contained inside the cell?
A. hypotonic
B. isotonic
C. hypertonic

Answers

Answer:

C.

Explanation:

A hypertonic solution will indicate that the concentration of solutes is higher than that inside the cell.

The unicellular spores of the fern Ceratopteris richardii are about 100 μm in diameter. Calculate the surface-area-to-volume ratio of a cube whose sides are 100 μm in length to approximate the surface-area-to-volume ratio of the fern spore cell. Show your work.

Answers

Answer:

Take 6(100x10^-6)^2  which is the surface area of it.

The volume is (100 x 10^-6)^3 this is the volume of it.

This is the surface to volume ratio, so 6(100x10^-6)^2 divided by (100 x 10^-6)^3.

Moreover the volume is 6 x 10^4

one important each stage of the house fly

Answers

The house fly develops in four stages: egg, larva, pupal, and adult.

Answer:

egg, larva (or maggot), pupal, and adult

Explanation:

depending on the type of fly, it may take about 1-4weeks for the cycle to be completed.

How do you think life on Earth would be different without the evolution of angiosperms? Provide two examples, each with an explanation.

Answers

Answer:

Without angiosperms, average annual rainfall in the area declined by 300 millimeters. In the eastern Amazon basin, the length of the wet season decreased by nearly 3 months. The extent of the wettest rainforests, which receive more than 100 millimeters of rain per month, shrank by 80%.

1 point
A mutation in a gene results in an animal that cannot make a protein that
allows muscles to contract. Which of these is most likely to happen? *
A. The gene will eventually be found in all animals of the species.
B.The animal will die before having any offspring.
C.The gene will change back to the normal form.
D.The animal will pass this gene on to many offspring.

Answers

The effect of a mutation in a gene results in an animal that cannot make a protein that allows muscles to contract is that the animal will die before having any offspring.

What is mutation?

Mutation is any change in the nucleotide sequence of the DNA.

Since genes are responsible for the synthesis of proteins, this means that a change in the nucleotide sequence of the gene will affect the production of proteins.

According to this question, a mutation in a gene results in an animal that cannot make a protein that allows muscles to contract.

This means that the animal will die before it gets the chance to produce offsprings.

Learn more about mutation at: https://brainly.com/question/17106056

PLEASE HELP!!! Methods of contraception are designed:
A) for females only
B) for males only
C) for use mostly by females
D) for use mostly by males

Answers

C (for use mostly by females)

Answer:

mark me brainlest now FRIEND

-ps:the answer is c) for mostly females

Explanation:

How do vasoconstriction and vasodilation contribute to the homeostasis of body temperature ?​

Answers

Blood vessels, which lead to the skin capillaries, become narrower they constrict which allows less blood to flow through the skin and conserve the core body temperature. This is called vasoconstriction.

where does natural selection happen ?

Answers

Answer:Natural selection occurs in nature obviously. There are quite a few reasons natural selection happens. One of the reasons natural selection occurs is because sometimes more offspring are born but not all of them survive.

Explanation:

The person above is correct

This type of lightbulb uses the MOST energy?

A: Incadescent
B: CFL
C: fluorescent
D: LED

Answers

Answer:

C. fluorescent

please make me brainliest...✨

True or false? The skills and characteristics needed for a high-quatilty friendship are the same skills and characteristics needed in a committed long-term relationship of marriage

Answers

Answer:

True and false because it depends, some characteristics can be used while others not. However, I believe that the best choice would be TRUE.

Explanation:

When was DNA recognized?
O 1900
O 1944
O 1977
O 1952

Answers

Answer: 1952


But real DNA was discovered and recognized in 1860’s and 1953

(ii) The deer releases a hormone when it sees the wolf. Explain how this hormone helps the deer to run away.​

Answers

The hormone released is adrenaline.

Adrenaline is what triggers an organisms fight or flight response.

This increases heart rate, raises blood pressure, and expands the air passages of the lungs. It alters the body’s metabolism in order to maximize blood glucose levels.

what are the main biological functions of water​

Answers

Regulates body temperature.
Moistens tissues in the eyes, nose and mouth.
Protects body organs and tissues.
Carries nutrients and oxygen to cells.
Lubricates joints.
Lessens burden the on kidneys and liver by flushing out waste products.

Which of the following best explains the connection between increased competition and the evolution of a species by natural selection?(1 point)

(A) Individuals that must compete for limited resources are more likely to have diseases that cause mutations.

(B) Individuals that have traits that allow them to outcompete others survive better and produce more offspring.

(C) Individuals must become stronger to compete for resources, and this increased strength is passed on to the next generation.

(D) Individuals migrate to another area in order to avoid competition for limited resources in the current ecosystem.

Answers

Answer:

B.

Explanation:

For A, more limited resources doesn’t mean more to mutations, mutations are random. C is incorrect, D and doesn’t explain the connection.

Natural selection occurs in individuals that have traits that allow them to outcompete others survive better and produce more offspring.

What is natural selection?

Natural selection is the process by which organisms are selected for survival in their environment by natural processes which depends on the ability of the organism to adapt to their environment.

These traits enable the organism to adapt to changes in their environment.

Therefore, natural selection occurs in individuals that have traits that allow them to outcompete others survive better and produce more offspring.

Learn more about natural selection at: https://brainly.com/question/14385908

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What is a quantum number​

Answers

Answer :

Quantum numbers are used in chemistry and quantum physics to explain the values of conserved quantities in the dynamics of a quantum system.

Quantum Number of Angular Momentum (l)

The angular momentum quantum number (l) denotes the general shape or area in which an electron exists—its orbital shape. The value of l is determined by the value of n, the fundamental quantum number. Positive values of the angular momentum quantum number range from zero to (n 1).

I hope this helps <3

Which of these is true of the nervous system?

The nervous system is entirely made up of epithelial tissue
The nervous system collects information from the external environment only
The nervous system takes a long time to respond to an environmental stimulus.
The nervous system sends instructions to the body about how to respond to stimuli

Answers

Answer:

the nervous system sends instructions to the body about how to respond to stimuli

Explanation:

Your nervous system uses specialized cells called neurons to send signals, or messages, all over your body. These electrical signals travel between your brain, skin, organs, glands and muscles. The messages help you move your limbs and feel sensations, such as pain.

In 1993 , geochemist Michael Russell proposed a mechanism by which life could have started on Earth as long ago as 3.5 billion years He proposed that life came from harnessing the energy from gradients that form when extremely alkaline water mixes with more acidic seawater . This proposal BEST describes which origin of life theory ?

Answers

Answer:

Hydrothermal vents

Explanation:

At the time of life's origin, the early ocean was acidic and filled with positively charged protons, while the deep-sea vents spewed out bitter alkaline fluid, which is rich in negatively charged hydroxide ions.

Answer:

D) hydrothermal vent life origin

Explanation:

i got it right on usatestprep!

b) In general, do you think you get enough calcium in your diet? What foods from the food pyramid do you eat regularly? (2 points)

ASAP please​

Answers

Answer:

Yes

Explanation:

I drink plenty of milk in my diet, and I know that I have enough calcium, because of my strong bones

Because the decay is close to the pulp chamber, the tooth must be monitored for the next few weeks to determine the health and extent of decay of the affected tooth. The dental assistant will need to set up for an intermediate restoration that will consist of the IRM material.

Answers

The pulp chamber of the tooth is the inner area of ​​the tooth that houses its pulp. If the tooth enamel is compromised, as in a cavity, bacteria can enter the chamber and affect the dental pulp.

What is IRM in Dentistry?

IRM is a temporary filling cement. Restorative material based on Zinc Oxide and Eugenol. Indication: Long-term temporary filling (up to one year). Great compressive strength.

With this information, we can conclude that the pulp chamber of the tooth is the internal area of ​​the tooth that houses its pulp. If the tooth enamel is compromised, as in a cavity, bacteria can enter the chamber and affect the dental pulp.

Learn more about pulp chamber  in brainly.com/question/7477955

What is what is the biggest change in leg anatomy from the dawn horse to modern horse

Answers

Answer:

The modern horse, in addition to having much longer legs, has developed hooves in place of hand/foot bones.

Explanation:

Just read the text :)

explain the factors that affect photosynthesis rate​

Answers

light intensity, carbon dioxide concentration and temperature.

Explain Genes in a expert way i will give bfrainlest who has the best answer

Answers

Answer:

Genes are pieces of DNA (deoxyribonucleic acid) inside each cell that tell the cell what to do and when to grow and divide. Each gene is made up of a specific DNA sequence that contains the code (the instructions) to make a certain protein, each of which has a specific job or function in the body. Each human cell has about 25,000 genes.

Explanation

I already learned about genes, and this is what I learned

Cancer is the abnormal growth of cells caused by uncontrolled cell division.

a. True
b. False

Answers

Answer:

Cancer is a disease caused when cells divide uncontrollably and spread into surrounding tissues.

So, I guess its true

What can tourists visit in St. Augustine?

A. Jefferson Memorial

B. Liberty Bell Center in Independence National Historical Park

C. Oldest wooden schoolhouse in America

D. Tunnel behind Niagara Falls

Answers

Answer:

C. Oldest wooden school house in America

Answer:

Its C

Explanation: i did this test before and i got it right

Which goose is using the most energy? Assume that the goose is the same size in each
case.
A. One who is sleeping in an area where the temperature is 45°F
B. One who is feeding in an area where the temperature is 45°F
C. One who is sleeping in an area where the temperature is 30°F
D. One who is flying in an area where the temperature is 45°F

Answers

Answer:

A because losse more energy

What is the largest tourist spot in Florida?

Jacksonville
Orlando
Tallahassee
Tampa

Answers

Answer:

Orlando

Explanation:

Because Disney land is in Orlando causing several tourists to travel to Orlando.

Answer:

Orlando

Explanation:

I got it right on my quiz.. hope this helped

Options
Body
Before
End
Appearance
After
Up
to move
Part
Pigmented
Cell

Answers

Answer:

ptions Body Before End Appearance After Up to move. Part Pigmented Cell. Add answer+5 pts ... What moves the chromatids around during cell division?

Explanation:

state when this reaction occurs (fibrinogen)?

Answers

Answer:

Thrombin, in turn, catalyzes the conversion of fibrinogen (factor I)—a soluble plasma protein - into long, sticky threads of insoluble fibrin (factor Ia). Blood-clotting proteins generate thrombin, an enzyme that converts fibrinogen to fibrin, and a reaction that leads to the formation of a fibrin clot.

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