Answer:
Because they are essential for physical and mental development of a body.
delivers blood to the heart
Answer:
veins
Explanation:
Arteries carry blood away from the heart and veins carry blood back to the heart.
how do fish obtain oxygen?
a.
from water flowing over their gills.
b.
from water flowing over their fins.
c.
from water flowing over their lungs.
d.
none of the above.
Fish take water into their mouth, passing the gills just behind its head on each side.
Which region of the brain controls your heart rate?
A. Medulla
B. Pons
C. Pituitary
D.Hypothalamus
How are traits determined by DNA?
evolutionary ideas of Lamarck and Darwin (research work)
Answer:
Lamarck's transmutation theory established the foundation of an evolutionary model introducing a new way to research in nature. Darwin's selection theory was proposed in 1859 to explain the origin of species within this epistemological process.
Explanation:
Check all of the items that are cycled through the biosphere in biogeochemical cycle
Answer:
Biogeochemical cycles important to living organisms include the water, carbon, nitrogen, phosphorus, and sulfur cycles.
Explanation:
identify the type of cell that specialised cells are formed from
Explanation:
Stem cells provide new cells for the body as it grows , and replace specialised cells that are damaged or lost.
4 Which muscles are actively involved in normal breathing?
Answer:
The main muscles are the diaphragm and intercostal muscles, but the muscles in the neck and the abdominal muscles also help.
Explanation:
The diaphragm is the muscle under the lungs that helps move the lungs while the intercostal muscles are the muscles in between the ribs.
the epicenter of an earthquake is
In the model that you built of the respiratory system, what structures did the straws represent?(1 point)
A. the trachea and bronchi
B. the chest cavity and ribs
C. the lungs
D. the diaphragm
Answer:
the trachea and bronchi
Explanation:
Compare the use of hormones as chemical messengers in plants and animals.
Both plants and animals use glands to produce and secrete hormones.
Many of a plant's hormones are secreted into the air, while many of an animal's hormones are secreted into the blood.
Many of a plant's hormones are secreted into intercellular fluid, while many of an animal's hormones are secreted into the blood.
Plants do not use hormones as chemical messengers, but animals do.
Many of a plant's hormones are secreted into intercellular fluid, while many of an animal's hormones are secreted into the blood.
Hormones are those substances which gives an organism the ability to respond to both internal and external stimuli which are necessary for their growth and maintenance.
Plant hormones are also known as plant growth substances which are produced in small amounts within the plant body (intercellular fluid).
They control growth and growth movements by accelerating or inhibiting cell division, elongation and differentiation.
Examples of plant hormones include auxins (produced at the apices of shoots) and gibberellins.
The animal hormones are secreted by endocrine glands directly into the blood stream. There are then transported to where ever they are needed.
Examples of animal hormones include:
ProlactinOxytocinAnti-diuretic hormone.Learn more here:
https://brainly.com/question/14791225
Why does cells divide instead of just grow larger?
Hello there :). Here is why cells divide instead of growing larger:
The larger a cell becomes, the more demands the cell places on its DNA. In addition, the cell has more trouble moving enough nutrients and wastes across the cell membrane. In time, the cell's DNA would no longer be able to serve the increasing needs of the growing cell.
6. Cytokinesis is when the cell now divides into two new cells, each with a full set of
chromosomes.
ATrue
b. False
Answer: true
Explanation:
BRAINLY IF CORRECT!!!! When a fan is moving is convection, conduction, or raditation, and WHY?
Answer:
Moving of fan is convection.
The faster moving air from the fan displaces the warmer air that is in direct contact with our skin. This enhances the rate of convective heat transfer, which means we feel cooler.
What process makes children different than their parents?
Answer:
So children look like combinations of their parents because they are. Each parent gives half of their genetic material to their children. The combination makes a unique combination of their parents genes. The scientific study of how traits are passed from parents to children is called 'genetics'.
Explanation:
Even where children's genes look identical to their parents, their bodies and minds could well differ, influenced by many other factors, including the portions of the parents' DNA that don't code for genes, their environment, and their behavior. I am the dark-haired, brown-eyed mother of two blond, blue-eyed children
One of the big ideas in science is that an experiment can be
Answer:
it allows individuals and organisations to achieve expertise
Explanation:
Questi
Holds instruétions for making proteins
Answer:
El ARN mensajero (ARNm) lleva las instrucciones para producir proteínas. Como el ADN, las proteínas son polímeros: largas cadenas ensambladas a partir de unidades moleculares prefabricadas que, en el caso de las proteínas, son aminoácidos. Una gran máquina molecular * llamada ribosoma traduce el código del ARNm y ensambla las proteínas.
Explanation:
Hi!! can u help me? It's a very confusing question
Answer:
Well since they have the same environment and the only thing that is different is the amount of sunlight and final height of the plant, we can say that the more sunlight a plant gets, the more it grows.
Which bio molecule is not found in cell membrane
Answer:
Nucleic acid
Explanation:
Hope this helps
what does social comparison theory propose?
That people have an innate drive to evaluate themselves, often in comparison to others.
Todas las organelas tienen adn?
Answer:
Tres orgánulos contienen ADN: el núcleo, las mitocondrias y los cloroplastos.
Explanation:
espero que te ayude
pls ans question c and d
Answer:
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Fill in the blanks
1. ..................... energy is used by plants to prepare their foods.
2. .............…. is the main source of energy for the earth.
Answer:
1.Sunlight.
2.The sun.
Hope it helps you .:-)Answer:
Solar energy/Radient energy is used by plants to prepare their foods.
Solar energy is the main source of energy for the earth.
True or false…
Every element emits a unique set of light wavelengths, and scientists can use these light fingerprints to determine what kind of atoms are in stars and nebulas.
Answer:
true
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ygggghgffggttttt
Will the amount of time studying effect your grade in the class?What is the independent and dependent variable ?
Answer: Time= independent Grade= Dependent
Explanation: Time is independent and the grade is dependent on time.
What do amino acids, fatty acids, and sugars have in common
A. They are used to make proteins.
B. They are used to lipids.
C. They are made of carbon, oxygen, and nitrogen.
D. They are made of carbon, oxygen, and hydrogen.
Answer:
The answer to this question is C. They are made of carbon, oxygen, and nitrogen.
Explanation:
Have a great day and good luck!
The amino acids, fatty acids, and sugars have in common are they are made of carbon, oxygen, and hydrogen. The correct option is D.
What are amino acids and sugars?Amino acids are organic compounds that are made up of amine and carboxylic groups. They are the building blocks of protein. The basic particle of amino acids is C, H, and O.
Sugars are sweet carbohydrates. They are made up of carbon, hydrogen, and oxygen. The fundamental formula of sugar is C6H12O6. They are the primary source of energy.
Fatty acids provide the structural strength to the body. They are made of carboxylic acid and aliphatic chains. They can be saturated or unsaturated. So these molecules have the same elements, from which they are made.
Thus, the correct option is D. They are made of carbon, oxygen, and hydrogen.
To learn more about amino acids and sugars, refer to the link:
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Write any three adaptional features of plants that grow in cold regions
Answer:
1. Cushion plants - these are compact, low growing plants. These characteristics help them to survive in cold and windy conditions. They trap airborne dust and use it as a source of nutrients.
2. Arctic poppy - this has a hairy stem to retain heat. The flower can track the sun in the sky to maximize the amount of sunlight it receives so that it can increase photosynthesis.
3. Cotton grass - this grass has small seeds that can easily be dispersed by the wind to ensure its survival. It is low lying to protect it from cold winds and has thin leaves to reduce water loss by transpiration. Cotton grass grows and produces seeds quickly as soon as the temperature increases.
4. Lichen - this organism does not need soil to grow. It grows very slowly, can withstand very cold temperatures and survives beneath snow.
Explanation:
Hope it helps.. if yes, plz mark me as brainliest
1. The word impertinent MOST
LIKELY means
A. curious.
B. understanding.
C. disrespectful.
D. amusing.
Answer:
The word impertinent most likely means disrespectful.
what is the definition of Concentration Gradient?
what is meaning of H2O and compound
Answer:
A chemical compound is a chemical substance consisting of two or more different chemically bonded chemical elements, with a fixed ratio determining the composition. For example, water (H2O) is a compound consisting of two hydrogen atoms bonded to an oxygen atom.
Explanation:
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