A hypothetical light bulb is provided 450 kilojoules of electricity; however, 90 kilojoules of electric energy was wasted producing heat, while the rest of the energy was actually used to produce light. What is the % efficiency of this light bulb?
*
45%
80%
0.2%
20%
None of the above
Which body systems help the respiratory system move gases between the lungs and the cells of the body?
Answer:
The Cardiovascular System
Explanation:
The respiratory system draws air into the lungs. Oxygen diffuses through the walls of the alveoli and across the walls of the capillaries where it enteres the bloodstream. The oxygen molecules are picked up by red blood cells, which are pumped through the blood vessels by the action of the heart. As the red blood cells carrying oxygen pass through capillaries near the cells, oxygen diffuses into the cells.
Answer:
The respiratory system collaborates with the circulatory system to deliver oxygen and remove metabolic waste. It also aids in blood pH regulation. Respiration is the process through which oxygen and carbon dioxide are exchanged between the atmosphere and the body's cells.
What features do
cardiac muscle cells
have when looking
under a microscope?
Answer:
stripes, branched together
Explanation:
i used to study different cells!
What is the largest bone in the human body?
The largest bone in the human body is the femur bone. The femur bone is located in the thigh. The function of this bone is to connect hip and knee joints. Not only the femur bone is the largest, the femur bone also is the longest bone in the human body.
Explanation:
The femur bone is a crucial part of the ability to stand and move for humans. It’s holding the weight of your body therefore the femur bone is also the strongest bone in the human body. The second largest bone in the human body is the tibia which is located in the leg, tibia connects the knee joint and ankle joint.
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Describe THREE ways in which parenchyma cells are structurally suited for their
specific function
Answer:
Parenchyma cells are distinguished by their thin walls and the fact that they are alive at maturity. To sustain structure, collenchyma cells produce thicker secondary cell walls. Sclerenchyma cells produce tissues like bark and vascular tissue by thickening their walls and dying off as they mature.
Explanation:
Parenchyma cells are distinguished by their thin walls and the fact that they are alive at maturity. To sustain the structure, collenchyma cells produce thicker secondary cell walls. Sclerenchyma cells produce tissues like bark and vascular tissue by thickening their walls and dying off as they mature.
What are two functions of parenchyma?Parenchyma cells are actively metabolizing living cells present throughout the plant body. These cells have thin primary cell walls. Some of the functions of parenchymatous cells in plants are storage, photosynthesis, secretions, etc. The photosynthesizing parenchyma cells are mostly present in green leaves of plants and have green chloroplasts.
Some of the parenchymatous cells also serve to store metabolites such as oil droplets, starch grain, water, salts, etc. The secretion of resins, tannin, hormones, nectar, and other substances is done by specialized parenchymatous cells.
Thus, Parenchyma cells are distinguished by their thin walls and the fact that they are alive at maturity.
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Why are antibiotics unhelpful for treating the common cold?
A. Colds are caused by bacteria.
B. Colds are caused by antibiotics.
C. Antibiotics cannot treat disease.
D. Antibiotics attack only bacteria.
Answer:
D. Antibiotics attack only bacteria.
Explanation:
The common cold is caused by virus, so it can not be cured by antibiotics.
Because, antibiotics only attacks bacteria. So, option (d) is the answer.
Answer: the answer to ur question would be answer choice D
Explanation:
Which of the following are controversies over water usage in the United States? Select the three correct answers. (2 points)
whether people should build dams on rivers
whether people should drink bottled or tap water
whether there are hidden costs to tap water
whether water treatment should be privatized
whether dams increase the salt level of water
These are points over water usage in the US are whether people should build dams on rivers ,whether people should drink bottled or tap water, whether water treatment should be privatized.
What Contaminated water and loss in US?Contaminated water and a loss of simple sanitation are undermining efforts to give up excessive poverty and disorder withinside the world's poorest countries. In 2017, 2 billion humans global did now no longer have get entry to to simple sanitation centers consisting of bathrooms.
As the U.S. water deliver decreases, call for is about to increase. On average, every American makes use of eighty to a hundred gallons of water each day, with the nation's predicted overall day by day utilization topping 345 billion gallons—sufficient to sink the country of Rhode Island below a foot of water.
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Answer:
whether people should build dams on rivers
whether people should drink bottled or tap water
whether water treatment should be privatized
Explanation:
I just did the quick check and i got it correct :)
explain how the age of the oceanic crust provided evidence for seafloor spreading
Answer:
The principle of seafloor spreading states that new ocean crust is always being formed, and that this crust is slowly carried farfar from its factor of starting place over a duration of time. The examine of the repeated reversal of the Earth's magnetic poles through the years has supplied convincing proof of seafloor spreading.
Hope this helped! I would appreciate a Brainliest if you wouldnt mind, and have a good day!
Hummingbirds need large amounts of energy to flap their wings between 60
and 200 times per second. Their wings beat so rapidly that it is difficult to see
them move. They often appear suspended in air for extended periods of time
without changing their location. Hummingbirds have long bills and grooved
tongues to reach into flowers to feed on flower nectar.
Which two body systems are involved based on the information above?
Select one:
•
skeletal and muscular
•
skeletal and endocrine
•
skeletal and digestive
skeletal and circulatory
which of the following is a benefit associated with the use of energy producing technologies excluding the burning of fossil fuels
a. reduce water use
b. reduce air pollution
c.reduce habitat loss
d. all of the above
Which is a correct interpretation of the cladogram shown below? Amoeba Sponge Earthworm Trout Lizard Koala Dog Platenia Jaws Segmented Body Unicellule Common Ancestor
A. Amoebas and trout are in the same genus.
B. Koalas evolved after dogs.
C. Koalas use placental birth,
D. Lizards evolved after earthworms
Answer:
its d
Explanation:
just took the quiz
Answer:d
Explanation:
The ___ of the brain controls our muscle coordination and balance.
Answer:
the cerebellum is at the back of the brain it controls the muscle
Nitrogen is an important element for which macromolecules? Why?
Answer:
Nitrogen in the reduced form is the major component of the three most important biological macromolecular structures: (i) proteins/polypeptides, (ii) DNA and RNA, and (iii) polymers of amino sugars.
There are four major classes of biological macromolecules - carbohydrates, lipids, proteins, and nucleic acids. Each are made up of different elements. Nitrogen is found in two of these macromolecules - proteins and nucleic acids.
Nitrogen is a naturally occurring element that is essential for growth and reproduction in both plants and animals. It is found in amino acids that make up proteins, in nucleic acids, that comprise the hereditary material and life's blueprint for all cells, and in many other organic and inorganic compounds.
Answer:
Proteins/polypeptides, DNA/RNA, and polymers/amino acids.
Explanation:
Nitrogen is EXTREMELY important for many macro molecular structures, and is found in the most important parts of the body. You need all of these things to keep you alive.
Hopefully this helped you.
What happens to the outer layer of the Red Giant as it expands?
A : It will drift off into space and become a Planetary Nebula.
B: It will explode and become a Planetary Nebula.
Answer: it’s A
Explanation:
Help with the meanings of the following words with the correct definition of the choices i sent below please help urgent.
Genetics: the study of heredity
Gene: characteristic of an organism found on a chromosome
Allele: variation of a characteristic/ gene
Law of segregation: 2 alleles of a trait separate during meiosis
Law of independant assortment: chromosomes/ genes separate randomly during meiosis
genotype: genes present in an individual
phenotype: individuals observable traits
heterozygous: 2 alleles of a pair of alleles are different
homzygous: 2 alleles of a pair of alleles are the same
dominant allele: trait is always expressed when present
recessive allele: trait is only expressed when 2 copies are preesnt
co-dominance: two traits are dominant/expressed
incomplete dominance: one trait is partically dominant over another
se-linked inheritance: gene found on the X chromosome
polygenic inheritance: added effect of 2 or more genes such as skin colour
Name the trophic levels in an ecosystem and explain how energy moves through the trophic levels. Use the food chain and food web in the discussion. ( Will Mark Brainliest).
Answer:
Eating prey.
Explanation
Describe the relationship between the level of oestrogen and the endometrium from day 7to day 14
3. How can freshwater ecosystems be impacted by global climate change?
They can freeze.
O They can flood.
They can become salty.
O They can dry up.
Answer:
I think its "They can flood."
Explanation:
The reason for this is due to the fact that climate change mainly deals with warming up the earth because of a hole in the ozone. But, I may be wrong... Its an impact on freshwater sources after all.
Which RNA brings instructions from DNA ?
A. tRNA
C. mRNA
B. rRNA
D. RNA
Can someone help me with this please. I dont know if I did this right or not.
which of the following cellular structure is possessed by all cells?
a. nucleus
b. cell membrane
c. chloroplast
d. mitochondria
Answer:
A
Explanation:
the nucleus is needed for all living creatures cells it contains the dna info to create basically the whole plants being.
All cells that can either prokaryotic or eukaryotic possess a cell membrane. The correct option is b.
What is cell membrane?The cell membrane is a biological membrane that segregates the inside of all cells from their surroundings and helps to protect the cell.
It is present in all organisms including a prokaryotic and eukaryotic cell.
Thus, the correct option is b.
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Dust from mining is commonly associated with
A. heart disease
B. lung disease
C. liver disease
D. kidney disease
Answer:
B. Lung Disease
Explanation:
From breathing in the coal dust all their lives.
Why does an egg's cell membrane change after a sperm have entered it?
to slow down implantation
to initiate cell division in the egg
to prevent other sperm from entering
to ensure that the sperm does not leave
(THIS IS A LIFE SCIENCE QUESTION!)
Alewife
populations
undergo extreme
fluctuations
sometimes
experiencing
large scale die-
offs from
unknown causes.
This is an
example of what
population
growth pattern?
A. Stable
B. Exponential
C. Irregular
Huntington's disease is an inherited disease that causes the progressive degeneration of nerve cells in the brain, resulting in significant physical, mental, and behavioral decline. There is no treatment or cure. A patient whose father has Huntington's disease is considering genetic testing to determine if she also will develop the disease. Which of the following would NOT be a benefit of the genetic testing? (2 points)
the following would NOT be a benefit of the genetic testing is "Knowing whether she carries the gene for Huntington's disease will help her select appropriate insurance coverage to meet her medical needs." Option C. This is further explained below.
What is Huntington's disease?Generally, Huntington's disease is simply defined as an autosomal dominant disorder, this disease may be triggered by a single errant copy of the faulty gene.
In conclusion, The Huntington's disease has to do with the genotype of a person\.
CQ
1.Huntington's disease is an inherited disease that causes the progressive degeneration of nerve cells in the brain, resulting in significant physical, mental, and behavioral decline. There is no treatment or cure. A patient whose father has Huntington's disease is considering genetic testing to determine if she also will develop the disease. Which of the following would NOT be a benefit of the genetic testing?
Knowing whether she carries the gene for Huntington's disease will allow her to plan financially for the years she may require assisted care.
Knowing whether she carries the gene for Huntington's disease will assist her in making reproductive choices, such as the odds of passing the gene to a child.
Knowing whether she carries the gene for Huntington's disease will help her select appropriate insurance coverage to meet her medical needs.
Knowing whether she carries the gene for Huntington's disease will prevent misdiagnosis or improper treatment of symptoms of the disease as they arise.
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Enternal Supplememts Explore similarities
The expression 'enternal supplements' refers to the diet additives used in this feeding methodology, which is based on gastrointestinal digestion.
What is Enternal digestion?Enternal nutrition is a type of digestion that provides nutrients (either micronutrients or macronutrients) and calories by directly using the gastrointestinal tract.
Enternal digestion is associated with the use of diet supplements that help to obtain the required nutrients.
In conclusion, enternal supplements are diet additives used in this feeding methodology, which is based on gastrointestinal digestion.
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Which characteristic best distinguishes quantitative data from qualitative data?
its validity
its repeatability
its ability to be graphed
its ability to be recorded
PLEASE HELP!!!!!!!!! 20 POINTS
Which of these is a function of the placenta?
A. To store the embryo's wastes
B. To hold the fetus upside down for birth
C.To digest food for the fetus
D. To bring oxygen to the embryo's cells
In seals, the gene for the length of the whiskers has two alleles. The dominant allele (A) codes long whiskers and the recessive allele (a) codes for short whiskers. if one parent seal is pure long-whiskerd and the other is short-whiskered.what percent of offspring would have short whiskers?
Answer:
None or Null
Explanation:
Long whiskers is AA(dominant)
short whiskers is aa(recessive)
parental generation:
AA aa
cross = Aa, Aa Aa Aa
First fillial generation = Aa, Aa, Aa, Aa
:.No offspring will have short whiskers as Long whiskers allele are dominant
Which of the following statements about ace inhibitors is true?
The statement that is true about the ACE inhibitors is that they are alpha blockers.
What are ACE inhibitors?The term ACE inhibitors refers to a group of drugs that are used as antihypertensive drugs and assist in the relaxation of the blood vessels.
The statement that is true about the ACE inhibitors is that they are alpha blockers.
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Missing parts:
Which of the following statements about ACE inhibitors is true? A. They're alpha blockers. B. They increase fluid volume. C. They add amyloid. D. They decrease fluid volume.
