Explanation:
PLEASE express yourself in English
(Physical Science)
A ball and stick model of a molecule of formaldehyde, CH2O, is made from the following components:
-one black ball
-one red ball
-two white balls
-three sticks
What do the sticks represent?
A. oxygen atoms
B. hydrogen atoms
C. carbon atoms
D. bonds between atoms
Answer:
option D is the correct answer
Answer:
D
Explanation:
Isabel is researching the effects of deforestation using online sources. She finds an environmental study on the relationship between deforestation and local weather.
Which of the following characteristics should this study have in order for its results to be considered valid?
1. Empirical observations
11. Evidence that can be replicated
III. Outcomes that don't change with new experimentation
OI and 11
O II and III
O I and III
O I only
Answer:
ll and lll
Explanation:
I did the math
The characteristics that the study have in order for its results to be considered valid are:
Empirical observationsOutcomes that don't change with new experimentation.Since Isabel is carrying out research and found an environmental study on the relationship between deforestation and local weather, it's important that the material should be valid in order to be accepted.
Therefore, to be valid, it should have the feature of an empirical observations and the outcomes should not change with new experimentation.
Empirical observations simply means the observations that are derived from experiments or based on experience.
In conclusion, the correct option is C.
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Which would be considered a reliable source?(1 point)
an opinion column in your favorite magazine
an article from a scientific journal
a blog written by an anonymous author
a biology textbook from 1920
When looking for updated and reliable information, you always need to point to scientific journals, magazines, encyclopedias, or textbooks recently printed or published. In the exposed example, the most reliable source is an article from a scientific journal.
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When looking for updated and reliable information, you need to be careful with the source, authors, and publishment dates.
In general, scientific journals, magazines, encyclopedias, or textbooks are sources of reliable information. The material exposed on these sources has been previously checked and evaluated by a group of people trained and capable to do so. If your favorite magazine is not a scientific one, you should look for another source.
You also want to consider the authors. Some researchers are very well known, and their publications probably reflect years of investigation. By looking for these authors´ publications you will ensure a good source. You should use a blog written by a well-known author, but not a blog that is written by an anonymous one.
You also need to consider that your source should be recently printed or published. Science is very dynamic and continuously changes. Discoveries always replace old information. So when looking for a reliable source, you need to look for recent publications. A biology textbook from 1990, although it is a reliable source, it probably has old information.
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A Microscope has an ocular objective of 10x and a high power objective of 50x, what is the microsc
total magnification?
Answer:10X– This objective magnifies the image by a factor of 10 and is referred to as the “low power” objective. 43X (or 45X)– This objective magnifies the image by a factor of 43 (or 45) and is referred to as the “high power” objective. 100X– This objective magnifies the image by a factor of 100.
Explanation:
Imena is teaching her younger brother how to build a fire. As the fire sparks and starts to burn the kindling and wood in the fireplace, her
brother asks if the fire is alive because it is moving and growing. Imena tells her brother that the fire is not a living thing, and her brother asks
what makes something alive. What response does Imena give her brother?
250 words remaining
For something to be alive, it has to have essential characteristics. Some non-living elements share some of these characteristics with living things, but not all of them. That is what distinguishes one from the other.
The characteristics that all living things have are:
organization; sensitivity; growth; reproduction; homeostasis; and metabolism.
As regards organization, the minimum unit of life is the cell. For something to be a living thing, it has to be a cell or have multiple cells. They have organelles and organize to perform different actions.
The following characteristic is sensitivity, which means that the thing has to react to a stimulus by giving a response.
Living things grow. In other words, they increase in size thanks to the elements that they take from the exterior and process them taking what they need to grow. To do so, they use metabolism.
Metabolism is the combination of catabolism( the elements that the organism destroys) and anabolism( the elements that the organism builds). Metabolism is also essential for homeostasis. These are the different reactions that an organism has to have a balance.
The last essential characteristic is reproduction. Living things have to reproduce themselves, there are different methods, and they depend on the type of living thing that they are.
In conclusion, fire is not a living thing because it does not have cells that can have metabolism, sensitivity, homeostasis, and it can not reproduce itself.
A living thing has six main characteristics:
organization sensitivitygrowthreproduction homeostasis metabolismEven though the fire seems like a living thing because it is consuming wood, making noises, and moving, as many living things do, it is not alive because it does not have cells. As it does not have cells, it can not have homeostasis, react to stimuli, or grow as cells do. It might look like a living thing, but it is not since it does not have the six characteristics that every living thing has.
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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:
how the consumers in one level of the pyramid obtain energy from the organisms at the previous level of the pyramid
Answer:
by feeding on the organism on the previous level, the consumers at each level will receive energy. However, most of the energy is lost at each trophic level and very little gets transferred from one trophic level to another. Approximately, 10% of the energy is transferred from one trophic level to another.
Explanation:
hence, when a level takes energy from a previous level, the engery transfers but slowly gets less, so some levels get less energy depending on where the engery was located.
How does earthquake bring about change in the topography of the earth
Answer:
Earthquake cause a massive impact like cracking the grounds and creating a big change in the map and the world
please help
1. Which of the following best describes the relationship between cells and living things in
general?
A. The larger the living thing, the larger its cells
B. The larger the living thing, the greater number of cells it contains
C. The number of cells in all living things is the same
D. There is one kind of cell, which all living things are made of
For the respiration in yeast cells lab with the bottles and balloons what would be a suitable conclusion for the lab?
Answer:
[tex]4(x + 3) = 6(x + 1)[/tex]
what do viruses have in common with living things.
A- they are made up of specialized cells
B- they contain genetic material
C- they reproduce by mitosis
D- They contain chlorophyll
Answer:
B-They contain genetic material.
Explanation:
They are not made out of cells. They don't reproduce by mitosis(Only cells reproduce by mitosis).
Only specialized plant cells contain chlorophyll.
They do have genetic material which could be DNA or RNA.
What is DNA barcoding?
Answer:
A DNA barcode is a short, standard gene segment of an organism that has been identified in a gene bank, used to identify unknown species by comparison with the DNA sequence of the gene bank. .
safety laboratory rules
Answer:
please mark me brainliest
Explanation:
Know locations of laboratory safety showers, eyewashstations, and fire extinguishers. ...
Know emergency exit routes.
Avoid skin and eye contact with all chemicals.
Minimize all chemical exposures.
No horseplay will be tolerated.
Assume that all chemicals of unknown toxicity are highly toxic.
Answer:
Rule #1 - WALK
Rule #2 - PROPER LAB ATTIRE
Rule #3 - HANDLING CHEMICALS
Rule #4 - HANDLING EQUIPMENT
Rule #5 - BROKEN GLASS
Rule #6 - EYE WASH/SHOWER
Rule #7 - FIRE SAFETY
Rule #8 - EATING/DRINKING IN LAB
Rule #9 - CLEANING UP
Rule #10 - HAND WASHING
Explanation:
use the following terms in the same sentence:prokaryotic,nucleus and eukaryotic
While eukaryotic cells have a membrane-bound nucleus, prokaryotic cells do not.
hope this helps:)
Can someone please help me with this I would really appreciate the help.
hopefully this helps! check it out
2.2 Why are
the properties of
water important to
organisms?
Answer:
Because it helps to support the life process and habitats of living organisms . Like plants need water for photosynthesis, animals to drink etc..
Largest gland in human body
Answer:
Liver is the largest gland in human body.
How would Charles Darwin account for the diversity of living things
Answer:
Darwin's experience as a naturalist aboard the H.M.S. Beagle exposed him to the many living organisms distributed throughout South America. ... From these observations, Darwin determined that species did not arise independently; rather species are descendents of other species.
Explanation:
Underground mining removes minerals from deep in the earth. Miners use blasting to separate the "waste" from the mineral deposit. Which statement best describes
an environmental consequence of this process?
O Underground mining activities often cause noise pollution
O Acid mine drainage kills plants and animals around the mine.
O High salinity of wastewater reduces soil fertility and vegetation
O Soil is removed by the force and pressure of the drilling process.
Answer:
Acid mine drainage kills plants and animals
Explanation:
took the quiz :)
The correct answer as to the environmental consequence of using blasting to separate wastes from mineral deposit is noise pollution. The statement that best describe the process, therefore, would be that underground mining activities often cause noise pollution.
Blasting simply means to break something apart or to blow up something. When blasting is associated with mining, it usually involves the use of explosives. These explosives make loud noise when they are used in blasting.
Hence, blasting can be said to be a source of noise pollution to those staying close to the mining area.
More about blasting can be found here: https://brainly.com/question/15084946
Why was Mendel's work not accepted at the time?
explain how fixation happens
When a car drives down a street, what energy conversions are happening?
A. The stored energy of the gasoline is converted to the potential
energy of the car.
B. The kinetic energy of the gasoline is converted to heat and the
kinetic energy of the car.
C. The kinetic energy of the gasoline is converted to heat.
D. The potential energy of the gasoline is converted to heat and
kinetic energy
Answer:
it is D
Explanation:
The gasoline fuel used inside the car has inherent potential energy in its molecules. When the car is started, this potential energy will be converted to heat energy. The heat energy will then be used to carry out mechanical works in the engine of the car, this makes the car to move forward.
Trout (fish) raised in cold water weigh more than trout raised in warm
wator.
What is the independent variable and the dependent variable
O Water temperature
O Weight of trout
O Amount of food
What is the answer to the question 3
Answer:
D. the natural resources available in an ecosystem.
Explanation:
Carrying capacity can be defined as a species' average population size in a particular habitat. The species population size is limited by environmental factors like adequate food, shelter, water, and mates. If these needs are not met, the population will decrease until the resource rebounds.
What is the greatest advantage of using different methods that result in the same outcome?
Explanation:
I think that if you use different methods that result in the same outcome you will have more chances of getting the required result. This is because you don't know whether one of your methods might work or not, so having many of them help you.
Not sure if I'm correct or not but I hope this helps
describe what may happen to viruses that leave infected white blood cells
Answer:
White blood cells are an important part of the immune system. HIV infects and destroys certain white blood cells called CD4+ cells. If too many CD4+ cells are destroyed, the body can no longer defend itself against infection. The last stage of HIV infection is AIDS (acquired immunodeficiency syndrome).
What is The Semmelweis reflex?
Answer: unconscious bias
Explanation:
Answer:
The tendency to reject new evidence or new knowledge because it contradicts establish norms, beliefs or paradigm
The
the value of the coefficient of friction, the greater the
resistance to sliding.
Differentiate between tadpoles and frogs in two points
Answer:i hope it's help you
plz mark me as a brainlist i really need this
Explanation:
Tadpoles : 1.Tadpoles have gills to aid breathing under water 2.Tadpoles have tails and fins to help them swim 3.Tadpoles have keratin like teeth called denticles 4.Tadpoles live in water only 5.Tadpoles have a two chambered heart 6.Tadpoles are herbivores 7.Tadpoles have a soft cartilage-like skull Frogs: 1. Frogs have lungs to aid breathing under water 2.Frogs have fore limbs (arms) and hind limbs (legs) to help them swim 3.Frogs have tiny teeth on the upper and lower jaws 4.Frogs live in both water and on land 5.Frogs have a three chambered heart 6.Frogs are carnivores 7.Frogs have a well-developed hardened skull
A placebo is a fake treatment that mimics the experience of the experimental group.
true
false
Answer:
true
Explanation:
Doctors (or scientists) usually use this to make sure people aren't lying about the experience.
For example, some people might expect that if they take ibuprofen or Tylenol, they won't feel as much pain, so they might make themselves believe that they aren't feeling said pain. If you use a placebo group, you are less likely to have situations like that occur, and so your data becomes more accurate.
