what is stimuli in biology in terms of igcse ????​

Answers

Answer 1

Answer: A Stimulus is any change either internal or external which leads to a response. This could be a noise, smell or the changes in blood sugar level.

Explanation:


Related Questions

Which of the following is NOT a characteristic of all living things?
Ability to reproduce
Ability to move
O Growth and development
Homeostasis

Answers

Answer:

homeostatis

Explanation:

The answer should be homeostatis. Organisms can not do this.

Answer:

Ability to move

Explanation:

All organism species have the ability to reproduce, grow and develop, and maintain homeostasis (for example, sweating). Not all organisms can move, however. Cacti, for instance, are stiff and do not move on their own, yet are still alive.

true or false? diffusion involves the movement of gases and solutes

Answers

Answer:

true

Explanation:

The answer is true.

c)how much of the parent's genetic material does this komodo dragon have​

Answers

Need more details. Is there an image? I'd be happy to answer if you can upload this question with much more detail.

Hi! If you could provide more details about this question, I would be happy to answer your question if I can. If there was anything else, like a picture, please provide it. :)


Diffusion is the movement of molecules from an area of high concentration of molecules to an area with a ____ concentration.

A. Equal
B. Higher
C. Lower
D. None of the above

Answers

Answer:

lower

Explanation:

Diffusion is the movement of molecules from an area of high concentration to an area of lower concentration. So, the correct option is C.

What is diffusion?

Diffusion is a type of passive transport, this means that it does not require any kind of external energy for movement of molecules. The difference in concentration in two areas gives rise to a concentration gradient. Where, in one area there is high concentration of molecules and in another, there is low concentration of molecules.

If the molecules move from an area of higher concentration to an area of lower concentration, they are moving along the direction of concentration gradient. This is why no additional energy is required. Diffusion is a type of passive transport where molecules move along a concentration gradient.

This is in contrast to active transport where molecules move against the concentration gradient and therefore require external energy.

Therefore the correct option is C.

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how would you relate force and acceleration?​

Answers

Force = mass * acceleration

This is Newton's second law

Explanation:

Hey there!

The external agency that brings change in body's action(i.e changes the body from rest to motion or motion to rest) is called a force.

We know;

The force is inversely proportional to acceleration. So, the best method to relate them is force in inversely proportional to acceleration of a place.

Hope it helps...

Answer the following questions in one word.
a)
What types of quantities are pain, sadness, happiness, etc.
titu used for comparis​

Answers

my answer has to be 20 characters but the answer is : Emotions

what happens to cells formed by meristematic tissue​

Answers

Answer:

The cells formed by meristematic tissue take up a specific role and lose their ability to divide. As a result, they form a permanent tissue. This process of taking up a permanent shape, size and function is called differentiation.

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Which of the following is a true statement about cartilage?
A.
It is found on articular surfaces of bone
B
It receives oxygen and nutrients by diffusion
C. The skeleton originated from cartilage in the womb
D
All of the above

Answers

Answer:

A. it is found on articular surfaces of bone

Answer:

All of the above, it is not A

Explanation:

4) How many milligrams are in 1,455 grams?
1,455,000 mg
145,000 mg
1,450 mg
1.45 mg
O
145 mg

Answers

1455000 ( you just multiply the mass value by 1000)

Grams can be converted into milligrams by multiplying the amount in grams by 1000. Therefore, 1455 grams will be equivalent to 1,455,000 mg. Thus, the correct option is A.

The conversion of metric units from one unit to another can be done by multiplication or division by powers of 10. If the unit is to be converted into a bigger unit, it has to be divided, whereas if the unit is to be converted into a smaller unit, it has to be multiplied.

Thus, the conversion of gram to milligram is conversion of a unit into a smaller unit and the amount, therefore, has to be multiplied.

There are 1000 milligrams in 1 gram. Therefore, 1,455 grams will have 1000 × 1,455 = 1,455,000 milligrams.  

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1. Define the following terms:
a.Producer
b.Autotraph
c.Consumer
d.Heterotroph
e.Chemosynthesis
f.Photosynthesis

2. How does the stability of an ecosystem depend on its producers?

3. What are two process used by producers to obtain energy?

4. There are very few producers that live deep below a lake's surface. Suggest an explanation for this patter.

5. Could producers survive without consumers? Why or why not?

Answers

Explanation:

Autotroph are known as producers

(1) Producer: An organism that makes it's own food it is the first Link any food chain[ green plants]

(2) Autotroph: An organism capable of synthesizing its own food from non-living substances using light or chemical energy.

(3) Consumer: An organism that eats other organisms

(4) Heterotroph: Organisms that obtain its food and energy by taking in living or once living material, usually plant or animal matter.

(5) Chemosynthesis: Process by which some organisms, such as certai (1) Producer: An organism that makes it's own food it is the first Link any food chain[ green plants]

(2) Autotroph: An organism capable of synthesizing its own food from non-living substances using light or chemical energy.

(3) Consumer: An organism that eats other organisms

(4) Heterotroph: Organisms that obtain its food and energy by taking in living or once living material, usually plant or animal matter.

(5) Chemosynthesis: Process by which some organisms, such as certain bacteria, use chemical energy to produce carbohydrates

(6) Photosynthesis: A process plants use to turn sunlight into food

How does the stability on an ecosystem depend on its producers?
they provide the basis for an ecosystems energy

What are the two processes used by producers to obtain energy?
photosynthesis and chemosynthesis

Few producers live deep below a lakes surface, suggest an explanation for this pattern
since sunlight is where most of the energy in an ecosystem comes from, there is less sunlight deep in a lake meaning less organisms can survive

Could producers survive without consumers?
without consumers, there would be too many producers and they would all compete with each other until they died out


I did this on quizlet, hope this helps!

Why does evolutionary theory absolutely require the earth to be very
old?

Answers

Answer:

Mainly because Evolution takes millions and millions of years to happen.

Explanation:

Evolutionary theory require earth to be very old because the process of evolution takes millions of year to happen.

What do you mean by evolution ?

Evolution is the process through which a population of organisms evolves as new generations replace ancestors. Individual species do not evolve; rather, communities of organisms do.

Natural selection processes like as environmental change, predation, or human disturbance create evolutionary adaptations, and these processes must continue and grow widespread for the change to remain and accumulate. That happens less frequently and slowly than you may expect.

Scientists have determined that Earth is 4.54 billion years old, with a 50 million year error, by dating the rocks in its ever-changing crust as well as those in Earth's neighbors, including the moon and passing meteorites.

Therefore, the Earth needs to be very old for evolutionary theory to be true.

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Why does evolutionary theory absolutely require the earth to be very
old?

Answers

Answer:

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Explanation:

rrmgtgkwggtugiwelwrogir;wre3irppwufooe4turjeowyeorut94w3ur3r93rutio22ofidjfdfdlau44eogrifkg5gyreu5uwqgkoqasswxsaslbkfbslsnnsvofs  noivfvbofb fdvnvvwiwrgrkbfs lb lxngjdckdrjgkakofbnbbtruufvnfbkf,fbhtrvfhvfknbtvjvjlv.vnvsvjivfdivfbnhyofsnvfghffn ufvnsnowfuhrnvfjkksvh n gvsicefh hr7gjshvythdisiqhdvjxksfyru ueyfhwiiwhfjfoftyfjkcei573ikdgjskqpqlzueoq,mncbx,z.qwertyuioopbdfvxnvd km  c  ca  fvf. v jld

How many cells does one gram of yeast contain?​

Answers

Answer:

20 billion cells

Explanation:

It is based on the assumption that there are 20 billion viable yeast cells per gram of dried yeast. While there are 20 billion cells, you'll find that many manufacturers will state other numbers on their products.

The number of cells that one gram of yeast contain is 12 billion cells.

What are yeast cells?

Yeasts are found in soils and on plant surfaces all over the world, and they are particularly prevalent in sugary environments like flower nectar and fruits.

It is predicated on the idea that each gram of dry yeast contains 12 billion live yeast cells. Despite the fact that there are 12 billion cells, several manufacturers will list different quantities on their products.

As opposed to mushrooms, yeast is a fungus that develops as a single cell, according to Laura Rusche, an associate professor of biological sciences. Although there is just one cell in every yeast organism, these cells form multicellular colonies.

Therefore, Yeast has 12 billion cells per gram.

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The cell wall is found in plant cells and gives it extra support and protection.

True or False​

Answers

Answer:

True

Explanation:

the cell wall supports the plant and allows it to be protected, how do we know that the cell wall does this is because as the plant gets weaker as does the cell wall making the plant "wilt"

Provide evidence to support the claim that viruses fall on the border between living and nonliving.

Answers

Answer:

Just like living organisms, viruses use genetic material such as DNA or RNA, but unlike living things, they cannot reproduce using mitosis, binary fission or meiosis. Instead, they simply insert the genetic material into a living cell and then replicate their genetic material along with the cell's in order to create more viruses.

Which statements describe the Sun? Check all that apply.

Answers

Answer:

the sun is big and there is many layer and the surface of the sun is 5.500 hot

Answer:

i already did the assignment and those are the answsers

Plants lose water through their
leaves when the stomata open
to let carbon dioxide into the
leaf. What is the name of this
process?

Answers

This process is called transpiration.

During cell reproduction, chromatin fibers coil up into structures called

a. chromosomes
b. lysosomes
c. nucleoli
d. ribosomes

Answers

it is a. chromosomes

During cell reproduction, chromatin fibers coil up into structures called chromosomes. Therefore, the correct option is A.

What are chromosomes?

Chromosomes are structures made up of DNA and proteins that are found in the nucleus of the cell. They contain genetic information That are responsible for the inherited characteristics of the organisms such as eye color, hair color, height etc.

Chromosomes play a crucial role in cell division, as they ensure the proper distribution of genetic material to the daughter cells.

During cell division, chromosomes are replicated and then separated into daughter cells, ensuring that each cell receives a complete set of chromosome.

The number and arrangement of a chromosome vary depending on the species, but all human cells except the sperm and egg cell contains 23 pairs of chromosomes. Hence, the correct option is A.

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1. What is the density of an object that has a mass of 1,470 g and volume of 42 mL?

Answers

Answer:below

Explanation:

ρ =  m/V=  

1470 gram/42 milliliter

=  35 gram/milliliter

=  35000 kilogram/cubic meter

as the light intensity is increased the rate of photosynthesis is:. (A) increase. (b) decreased (C) same (D) none of these ​

Answers

Answer: Not 100% sure, however I think that the correct answer is A (increased).

I think the anwsers is a too

please help me! Give the chemical name of a common example of an acid or a base used to clean grease

Answers

Answer:

Potassium or sodium hydroxide (KOH or NaOH) react with triglycerides to form soap (the process is called saponification, the reaction of a strong alkali with fats and oils). Soap is alkaline in nature and is an effective cleansing agent. It is a useful mild antiseptic and can treat heavy metal poisoning.

if an atom has seven electrons how many are located in the second energy level

Answers

Answer:

8 are locacted in the 2nd engery level.

Pasteur used tipped and untipped sterilized S-shaped flaks of broth in an attempt to​

Answers

Answer:

Show that life can only come from life (rather than spontaneous generation)

Explanation:

Pasteur boiled a broth in a flask with an S-shaped neck. Thebend in the neck prevented particles from the air reaching the broth, but still allowed air to get in.  No bacteria grew in the flask.  

When the flask neck was broken so that particles could get inside, the broth became cloudy, showing that microorganisms were only able to grow from other living things from the outside, and not spontaneously from nothing

I would really appreciate it if you help me.

Answers

Answer: H

Explanation:

Answer: well at least i helped you

Explanation:0

what units are used in the standard system

Answers

The metric system the the most commonly used system

Your laptop was left on all night without being charged. When you wake up, the battery is dead. What happened to the battery's energy? * 5 points It was destroyed It was transformed to light, heat and sound energy. It leaked out of the laptop's battery. It was given off to the surrounding air as radiation.

Answers

Answer:

It was transformed to light, heat and sound energy.

Explanation:

Energy in a battery is used act as chemical energy that gives power to an electronic device along wires.

Energy of laptops battery transformed to light, heat and sound energy when left overnight without being charged. Light energy can be seen when laptop left turned on, laptops also creates sounds due to intense vibrations as the system is turned on and chemical energy is utilized, and when chemical energy converted into heat energy and the system get heat up.

Hence, the correct answer is "It was transformed to light, heat and sound energy."

The valence of an element is equal to the number of ____
that an atom of
that element gains, loses, or shares while forming chemical bonds.

Answers

The valence of an electron is equal to the number of its group number. If it’s in group number 3, then it has 3 valence electrons.

(Please Help ASAP) (Brainlyest) (10 Points)
Your conclusion will include a summary of the lab results and an interpretation of the results. Please write in complete sentences.

Answers

The summary of this lab is that over time pollution has gotten worse. However, if you attempt to decrease the human impact the bad side effects decrease. For example, the loss of land by erosion in the Sahara Desert is less than present day if you take future development impact. Future development impact can decrease the bad side effects.

1 point
What is the difference between reproduction and heredity?
Reproduction is the process of passing on traits, whereas heredity is the process of
producing offspring
Reproduction is the process of producing offspring, whereas heredity is the process
of passing on traits.
Reproduction always involves changes in inherited characteristics, whereas heredity
does not
Heredity always involves changes in inherited characteristics, whereas reproduction
does not

Answers

Answer:

Reproduction is the process of producing offspring, whereas heredity is the process

of passing on traits.

Explanation:

PLEASE MARK BRAINLIEST, if you think this is correct and best! Thanks!

Reproduction generally means making copy of something, like giving birth/breeding, duplicating.

Heredity is inheritance of traits/ passing on traits from parents t thsir child/children through genes. It makes children have same traits as their parents and looks so what same like their parents!

They definitely aren’t same!

Reproduction is the process of producing offspring, whereas heredity is the process of passing on traits.

What do you mean by heredity?

Heredity, also called inheritance or biological inheritance, is the passing on of traits from parents to their offspring; either through asexual reproduction or sexual reproduction, the offspring cells or organisms acquire the genetic information.

Heredity explains why offspring resemble, but are not identical to, their parents and is a unifying biological principle. Heredity refers to specific mechanisms by which characteristics or traits are passed from one generation to the next via genes.

Heredity can be defined as the transfer of genetic characters from parents to offsprings by the process of fertilization, where the nuclei of male and female gamete fuses with each other and forms the genetic material of the zygote.

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Percent error definition for biology.

Answers

Answer:

A measure of how innaccurate a measurement is, standardized to how large the measurement is. Found by the formula (measured value-actual value)/actual value*100%J

Explanation:

Simply a percentage, the definition of it is up above.

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