Answer:
1). c
2) d
3) b
4) c
5) a
6) a
7) d
8) d
9) c
10) d
11) a
12) c
13)
14) d
15)
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.
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:
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
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.
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:
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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:
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:
what does social comparison theory propose?
That people have an innate drive to evaluate themselves, often in comparison to others.
Did the total number of new products with health claims increase or decrease between 1990 and 2000?
8th std science light lesson important points
Answer:
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Answer:
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Explanation:
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.
what is the importance of food safety handling?
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.
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.
Select the correct answer.
We use electrical devices that produce motion, light, and sound. Which aspect of energy explains why these devices are possible?
Answer:
electricity its energy and force
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
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 of the following options provides evidence of how algal blooms harm ocean ecosystems
Answer:
Harmful algal blooms cause thick, green muck that impacts clear water, recreation, businesses and property values
Explanation:
hope it may help you
One of the big ideas in science is that an experiment can be
Answer:
it allows individuals and organisations to achieve expertise
Explanation:
I really need help thiss ILL MARK BRAINLIEST IF CORRECT
Research the fossil record of humans and answer these questions:
Name at least two extinct species that share a close evolutionary relationship with humans.
Explain the similarities and differences that exist between these species and humans.
Is the fossil record complete for humans? Explain your answer.
Answer:
A Gigantopithecus, Paranthropus, Adripcines, and an Orrorin.
The similarities they have with us are the face features, personality traits, and DNA. The differences is that they have way more body hair, communication, and mental abilities.
Explanation:
Hope this helps you :)
Chimpanzees and bonobos are the two species that closely related to humans.
The fossil record shows that the DNA of human and ape are closely related to each other which indicates that about 6 million years ago humans shared a common ancestor with the Great apes such as chimpanzees and bonobos.
Human DNA is similar to chimpanzee DNA about 98.6%. Both are also similar in physical makeup and intelligence. The main difference between human and chimpanzee is that the chimpanzee walks on four limbs and they can't swim whereas humans walk on two limbs and can swim so we can conclude that the chimpanzee and bonobos resembles to human to a great extent.
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How are traits determined by DNA?
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:
1. The word impertinent MOST
LIKELY means
A. curious.
B. understanding.
C. disrespectful.
D. amusing.
Answer:
The word impertinent most likely means disrespectful.
the epicenter of an earthquake is
Give two incidents of osmosis process
Answer:
Raisin In Water. If you put a raisin into pure water, it swells up over time. This happens because raisin contains a higher concentration of sugar and other solutes than water, so water moves into the raisin cells by osmosis. Since the solvent (pure water) enters into the raisin cell, this is an example of endosmosis.
Explanation:
Human beings are responsible for the conservation of the environment. Justify
the statement.
Answer:
because of the following ways
Explanation:
1)because they protect plants
2)because they protect animals
3)because they are starting to use less vehicles
4)because they lessened the use of industrial vehicles
what is the definition of Concentration Gradient?
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