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Background
A 150-pound adult has about 5.5 liters of blood on average, which the heart circulates about three times every minute. A person's heart is continuously beating to keep the blood circulating. Heart health experts say that the best ways to keep our hearts healthy is through a balanced diet, avoiding smoking and regular exercise.
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Please help
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Answer:
.
Explanation:
What makes a fat saturated or unsaturated?
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Answer:
Saturated fatty acids lack double bonds between the individual carbon atoms, while in unsaturated fatty acids there is at least one double bond in the fatty acid chain. Saturated fats tend to be solid at room temperature and from animal sources, while unsaturated fats are usually liquid and from plant sources.
Explanation:
All planets in the solar system have surfaces that are made up of either one of two materials. What are the two materials?
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Answer:
are made of rock, containing common minerals like feldspars and metals like magnesium and aluminum.
Explanation:
Which component of a galaxy consists of tiny particles that look smoky or cloudy and can be found in the space between stars? A) Gas B) Stars C) Dust D)Sun
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Answer: Gas
Explanation:
Look through the lesson lol i know your school
Nebulae are different luminous regions of the interstellar medium that can be made up of cosmic dust as well as ionized, neutral, or molecular hydrogen, hence option C is correct.
What is dust?All the stuff between stars is referred to as interstellar matter by astronomers, and the complete collection of interstellar matter is referred to as the interstellar medium (ISM). Some interstellar material is gathered into massive clouds that are each referred to as a nebula.
Tiny pieces of solid matter drifting about in the region between stars make up cosmic dust. It's not like the dust you find in your home; instead, it has tiny particles that range in size from collections of just a few molecules to grains that are 0.1 mm in size.
Therefore, an interstellar medium can be made up of cosmic dust as well as ionized, neutral, or molecular hydrogen, hence option C is correct.
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Which human activity negatively affects the stability of the environment?
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Answer:
Some human activities that cause damage (either directly or indirectly) to the environment on a global scale include population growth, overconsumption, overexploitation, pollution, and deforestation, to name but a few.
Explanation:
Brainliest?
Water is an adhesive substance. This means that water particles
A. are attracted to other types of particles.
B. are repelled by other water particles.
C. are attracted to other water particles.
D. are repelled by other types of particles.
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Answer:
A
Explanation:
are attracted to other types of particles.
Adhesion is the term for the attraction of substances between distinct phases. It uses the attraction of water to other polar compounds, as an illustration, hence option a is correct.
What is the characteristic of water?Cohesion is the tendency of particles to cling together, it uses the attraction of water molecules to one another.
Water has a characteristic called cohesion in which water molecules form bonds with one another. As a result, surface tension develops and raindrops start to form.
Water molecules can interact with other molecules through adhesion, this enables water to adhere to surfaces like windows and other things.
Therefore, water is a strong adhesive that adheres effectively to many different materials, hence option a is correct.
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Which of the following are sources of extra nutrients that can cause algae to overgrow in water due to HUMAN activity? CAREFULLY select all options that apply
dissolved oxygen in water
treated waste water
viruses
combined sewage overflow (CSO)
fertilizers
cleaning products
dog poop on the streets of NYC
water running over rocks
(This is 7th grade sciencve).
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Answer:
Too much nitrogen and phosphorus in the water causes algae to grow faster than ecosystems can handle. Significant increases in algae harm water quality, food resources and habitats, and decrease the oxygen that fish and other aquatic life need to survive.
hopes this helpssssssssssssssssssssssssssssssssssss
Of all of the energy given off by the Sun directed towards Earth, approximately only 50 percent of the energy penetrates directly to
the surface of Earth. What is the best explanation for what happens to the rest of the energy?
A) Energy is lost during while traveling through space.
B) Energy is reflected or absorbed by Earth's atmosphere.
C) Some of the energy is reflected back into space by the Moon.
D) Energy is lost through the process of overcoming the Sun's large gravitational force.
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Give three differences between parenchyma and selerenchyma?
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Answer:
Parenchyma cells have thin primary walls and usually remain alive after they become mature while Sclerenchyma cells have thick lignified secondary walls and often die when mature.
Parenchyma forms the "filler" tissue in the soft parts of plants while Sclerenchyma provides the main structural support to a plant.
Parenchyma cells are usually loosely packed with large intercellular space while Sclerenchyma cells has no intercellular spaces between the cells.
Parenchyma: (1) “Found in” These type of cells are present in every soft part of the plant. (2) “Type of cell” Unspecialized and living cells. (3) “Cell shape” There are various shapes of the cells, but generally, they are isodiametric.
Sclerenchyma: (1) “Found in” it is found in mature parts of the plants or trees. (2) “Type of cell” specialized, matured and dead cells. (3) “Cell shape” Sclereids, elongated and fibre shape.
Need help right nowwww!!
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Hope this helps
Have a great day/night
4. Transcribe and Translate a Gene. How is mRNA different from DNA? (Hint read the side-bar on this page for help) What is the correct starting position for translation? Write the amino acids used to assemble your protein in the order below. Where does translation take place?
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In the simplest sense, expressing a gene means manufacturing its corresponding protein, and this multilayered process has two major steps. In the first step, the information in DNA is transferred to a messenger RNA (mRNA) molecule by way of a process called transcription. During transcription, the DNA of a gene serves as a template for complementary base-pairing, and an enzyme called RNA polymerase II catalyzes the formation of a pre-mRNA molecule, which is then processed to form mature mRNA (1). The resulting mRNA is a single-stranded copy of the gene, which next must be translated into a protein molecule.
At which type of technonic plate boundary is a volcano least likely to occur
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Answer: A
coz its just sliding one another
Hope it is correct
^_^
Osmosis is important to cells because _______ *
cells contain fluids that are mostly water
cells are filled with fluids that are mostly sugar
cells need to be kept cool
cells need food
( PLEASE ANSWER THIS ASAP!!!) Thanks!!
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Answer:What is the main function of osmosis? Osmosis helps in stabilizing the internal environment of the organism by balancing the levels of water and intracellular fluids. Also, the nutrients and minerals enter the cell by osmosis which is necessary for the survival of cells.
Explanation:
Osmosis maintains the osmotic pressure in cells. the answer to this question is options A and B.
Osmosis is essential for the cells due to two reasons:
1. Cells are made up mostly of water-based fluids. The process of osmosis involves the movement of water molecules from a region with a lower concentration of solutes to an area with a greater concentration of solutes through a semipermeable membrane. This aids in preserving the equilibrium of water within and outside the cell, ensuring that the cell remains hydrated and performs as intended.
2. Sugar-based fluids are the main component of cells' fluids. Osmosis also affects how much sugar and other solutes are present inside cells, helping to control their concentration. Osmosis will cause water to enter the cell if the concentration of sugar inside the cell is higher than the outside, diluted the sugar, and maintain equilibrium.
Therefore the correct answer is options a and b.
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What is the difference between a molecule and a diagram of a molecule ?
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Answer: The molecule itself is the actual thing present.
while the diagram explains what makes up a molecule or what it looks like structurally
Explanation:
i know its not a study question but if deaf peopke dont know what people sound like how do think in their head
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Answer:
deaf people can think and know thier voice when they are thinking so they don't rlly need to imagine peoples voices they know what people would soundlike but some people aren't born deaf and know how people sound like
Explanation:
Answer:
Well.. they have their own voice that they can be able to hear in their head... it's given automatically, the voice they hear when they talk. It's not something where the first voice you hear in your life, is the one you hear for the rest of ya life..
Explanation:
Hope this helped :D Have a great day
QUICK PLS
Body cells have
____ the number of chromosomes as sex cells.
a: 4times
b: one half
c: one fourth
d: twice
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Answer:
Body cells have twice the number
Which is most likely the last to form
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Atmospheric nitrogen, in its gaseous form, is useful to plants. *
True
False
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Answer:
true
Explanation:
Answer:
False.
Explanation:
Atmospheric Nitrogen, in its gaseous form, is harmful to Plants and Animals.
Have a great day! (:
Will lactase, the enzyme that digested the ice cream's lactose, also work on the lactose found in cheese?
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Answer:
Yes
Explanation:
This is because lactose found in any dairy product will always have the same molecular structure. The lactase enzyme breaks down lactose because of how it is structured, so it does not matter where the lactose comes from.
Can you tell me which go where?
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Answer:
heredity goes to the first one
phenotype at the second one
Explanation:
Overgrazing reduces grass cover and negatively impacts the soil health by reducing it's ability to hold water . How can Overgrazing be prevented and support a more sustainable use of grasslands ?
A. Allow developers to buy rachlands for housing .
B. practice moving confined cattle every few days
C. Allow unlimited animals to graze in a given area to reach carrying capacity.
D. practice grazing an area of land at the same stage of plant growth each year .
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Answer: C. Allow unlimited animals to graze in a given area to reach carrying capacity.
Explanation: I choose this as the answer because the animals grazing in the wrong parts be part of the reason the soil can't hold the water it needs, so allowing animals in a particular area that's less of a problem with Overgrazing would be helpful
In C3 cycle one carbon compound is accepted by?
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Answer:
The correct answer is - RuBP.
Explanation:
In calvin cycle or C3 cycle there is only one carbon compound present or enter in the cycle is carbon dioxide which is enters through stomata and move into stoma of chloroplast. It is the site of of the C3 cycle.
In calvin cycle energy used to reduce 3-phosphoglyceric acid to produce glyceraldehyde-3 phosphate which result in generation of the RuBP that accepts the CO2 from the air to attached with RuBISCO.
which of the following substances is formed during photosynthsis hurry please thx
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Answer:
Glucose
Explanation:
During photosynthesis plants produce a substance called glucose from simple inorganic molecules.
Hope this helps :D Have a fantastic day ^-^
What does the lunar rover do?
O moves astronauts around
O gives air to astronauts
O makes space rocks
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Moves astronauts around
QUESTION: Which one of the following is likely to be most effective in reducing dental decay?
(a) Eating fibrous food, e.g. apples, after meals.
(b) Cutting down on sweets, biscuits etc. between meals.
(c) Cleaning the teeth after meals and at night.
(d) Using an antiseptic mouthwash.
help me plz
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Answer:
It is between B and C I am 99.999% Sure its C but you might wanna check :))))
Explanation:
Which of the following is a synthetic material?
a. wood
b. plastic
c. wool
d. coal
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Hope this helps !
Answer:
Your answer is B) Plastic.
Explanation:
"Synthetic" just means "human-made" or "artificial".
A), C), and D) can all be found in nature, and aren't made by humans.
While the average human is able to hold his or her breath for approximately one minute, a whale can dive for over 30 minutes without returning to the surface. Which of the following correctly describes this difference? (4 points)
Whales need less energy than humans.
Whales gather energy from their environment better than humans.
Whales are more efficient at gas exchange than humans which helps them conserve energy.
Whales have cells that produce energy differently than humans.
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Answer:. I guess it's b because we know that whales have a blowhole hope this helps
Which best explains the role of plants in the nitrogen cycle?
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Answer:
Assimilation
Explanation:
This is how plants get nitrogen. They absorb nitrates from the soil into their roots. Then the nitrogen gets used in amino acids, nucleic acids, and chlorophyll. ... When a plant or animal dies, decomposers like fungi and bacteria turn the nitrogen back into ammonium so it can reenter the nitrogen cycle.
How can the health of a forest play a role in maintaining human health?
A. Forest can be a source of mining.
B. Forest provide pulp to make paper.
C. Medicines are made from forest species.
D. Forest provide numerous wildlife habitats.
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Answer:
C. medicine can be made from different sources in the forest
Which is the most efficient way to avoid DNA mutations from UV radiation?
Avoid getting X-rays at the doctor’s office.
Avoid protective shields during X-rays.
Avoid UV radiation by wearing sunscreen.
Avoid UV radiation by using a tanning bed.
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Answer:
Sunscreen is the best, and most efficient way to avoid DNA mutations. UV radiation causes thymine dimers in the DNA complex, so limiting UV radiation is key to avoiding DNA mutations.
Explanation:
The most efficient way to avoid DNA mutations from UV radiation is to avoid UV radiation by wearing sunscreen. Thus, the correct option is C.
What is DNA mutation?DNA mutation may be defined as the process that induces sudden, stable, and inheritable changes in the genetic material of organisms through various factors.
The UV radiations are the most potent physical agent that induces DNA mutation. But in order to avoid such kinds of DNA mutations from UV radiation one must be required to be protected from such kinds of harmful radiation with the help of sunscreen.
The UV radiation induces DNA mutations by causing the dimerization of the thymine base, which significantly alters the whole sequence of genetic material.
Therefore, the most efficient way to avoid DNA mutations from UV radiation is to avoid UV radiation by wearing sunscreen. Thus, the correct option is C.
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