A material undergoes radioactive decay if it has an atom with unequal number of protons and neutrons.
What is an atom?
An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.
The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.
Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.
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Where will you put the decimal point in the number 580000
Answer:
after the last zero
Explanation: because thats where the whole number ends and after that the decimals begin
The statement “the flower grew 8 cm on Tues" is a(n):
a. Observation
b. Inference
c. Skepticism
d. Bias
Other:
Answer:
a
Explanation:
You watching the flower and noticing it grew 8cm is an observation
Which statement correctly describes a feature of the rock cycle?
Rocks are preserved through the process.
Rocks change from one type to another.
Different rock groups are not related to one another.
Rocks change from one type to another in a specific order.
Answer:
D is wrong, It's B
I got a 100%
Explanation:
The statement 'rocks change from one type to another' correctly describes a feature of the rock cycle.
What does rock evolution mean?Rock evolution is an expression used to explain the physicochemical modifications that a rock suffers across geological time.
Some of these physicochemical processes include, among others, metamorphism, erosion and sedimentation.
In consequence, the composition of rocks may vary across time, and it is a fundamental concept in geology.
In conclusion, the statement 'rocks change from one type to another' correctly describes a feature of the rock cycle.
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Which describes the paleoanthropology practice of walking the landscape looking for fossils on the surface?
Answer:
The correct answer is : surveying.
Explanation:
Paleo-anthropology is the study of the extinct primates, it is a sub branch of anthropology. It is focused on the human evolution and rise of the sub type of family of the other human or hominids.
Surveying is the one of paleoanthropoolgy practices that involves the finding the fossils of hominids on the surface of all around the globe by walking to compare it and study the evolution of human family.
Thus, the correct answer is- surveying.
1. What percentage of American Farms are family operated?
Answer:
97% of american farms are family opertaed.
Explanation:
A scientist hypothesizes that a plant with a thin cuticle will not survive as long without water as a plant with thick cuticle. Explain what the scientist could do to test this hypothesis.
Answer:
To make an experiment where plants with thin cuticle are under two different treatments: normal conditions and water stress conditions
Explanation:
An experiment is a scientific procedure that enables to confirm (or reject) a hypothesis. Thus, it is possible to determine the effects of the cuticle on the survival of the plant by subjecting plants with thin cuticle to two experimental conditions (normal and water stress conditions), which can be used to determine if the differences in plant survival are statistically significant to support the hypothesis (e.g., the key role played by the plant cuticle). Moreover, it is important to note that it is imperative to include a control group in order to contrast with the obtained experimental results (e.g., to include plants with thick cuticle in both treatments).
20. Define and give an example of radiation:
Answer:
Radiation is the process of sending energy i. the form of light, heat, or nuclear particles.
An example: Radio waves, or waves produced from your mobile phone.
Which of the following statements about microarrays is false?A. Microarrys enable scientists to to determine the activity of thousands of genes at once.B. Microarrys use flurescently labeled cDNA molecules to identify particular genes expressed at a particular time.C. Microarrys use tiny portions of double-stranded RNA fragments from a large number of genes.
Answer: C. Microarrys use tiny portions of double-stranded RNA fragments from a large number of genes.
Explanation:
A DNA microarray) is a solid surface to which a collection of DNA fragments is attached. The surfaces used to fix the DNA are highly variable and can be made of glass, plastic or even silicone. It involves placing thousands of gene sequences in specific locations on a glass slide called a chip. Microarrays basically miniaturizes processes that have been used in molecular genetics laboratories for years. So, a sample containing DNA or RNA is put in contact with the chip, and it allows the detection of DNA or RNA molecules by hybridization or adhesion of the molecules on the slide. The detection of the DNA or RNA adhered is made by different labels or colors that allow them to be detected under the microscope.
Microarrays are usually used to identify genes with differential expression under different conditions. For example, to detect genes that produce certain diseases by comparing expression levels between healthy cells and cells that are developing certain types of diseases. The matching of the complementary bases between the sample and the gene sequences on the chip produces a measurable amount of light. The areas of the chip that produce this light identify the genes that are expressed in that sample.
Then, in summary, the DNA chips are used to analyze the differential expression of genes, and the levels of thousands of genes are monitored simultaneously. And it measures the level of hybridization between the specific probe (probe) and the target molecule (target), indicated by fluorescence and through an image analysis, which indicates the level of gene expression.
35. To study whether the average house cat prefers a chicken-based food or a vegetable-based food,
Arianna provided her cat with equal amounts of each kind of food at every meal time for a week. What
is the source of error in her experiment?
Answer:
She should involve one more than one cat in the experiment.
Explanation:
Errors are the mistakes happened in an experiment that causes results that are inaccurate in nature.
There is one error in the given experiment that Arianna should perform the experiment in more than one cat to find more accurate results. This is so because only one cat will not be able to give all the effects or side-effects of the food and the involvement of more cats will help to find more accurate observation.
Hence, the correct answer is "She should involve one more than one cat in the experiment."
Explain what the interviewer meant when he said that genetic mutations are like misprints in a book.
Answer:At times parts of the gene can change entirely, leading to alteration of the product. There are many types of gene mutations, but all types of mutation can potentially affect the cell and its function.
Explanation: A publisher can misprint a book in several ways. The publisher can miss words, make spelling erros, mix up paragraphs or delete some text entirely.With these kinds of errors, the text will be inaccurate, and the reader can get confused. Mutations in genes happen similarly.
Birds and humans are theorized to have a common ancestor because they have homologous structures. Which evidence best supports this theory? They both have tails and embryos. They each have vestigial structures. They have analogous structures. They have different forms as adults.
Answer:
They each have vestigial structures.
Explanation:
Birds and humans have a common ancestor as they have homologous structures.
Vestigial structures are the organs that have some important functions in the past but now in present, they do not perform any function.
Both humans and birds have vestigial structures such as humans have an appendix and ear pinna and wings of flightless birds such as ostrich.
Hence, the correct answer is "They each have vestigial structures.".
Answer:
They each have vestigial structures.
Explanation:
The influence of biology on the development of technology and engineering
1. Give some of your examples where knowledge from biological science has contributed to the development of some technological processes; 2. List some (for you) famous scientists who have contributed to the development of biological science and applied biological sciences. This should be a research paper in the form of a paper e.g.
Please help,write a lot, everything you know
Answer:Their impact(s) may be beneficial or detrimental depending on how these ... [Some of these technologies are related to the manipulation of biological ... Techniques have been developed to expand both the diversity of nucleotide or ... By the early 1970s, scientists had demonstrated that they could engineer synthetic genes.
Explanation:
True or false: All chemicals after the lab can be thrown back into its container for reuse.
Answer:
false
Explanation:
chemicals should never be reused because it cam affect the next experiment. always ask your teacher what to do with the materials.
Answer:
False
Explanation:
All chemicals after a lab experiment should be disposed of in the correct way (usually a container that is for hazardous waste). Failing to do so can be very dangerous as they've already been used
What is a good explanation for the '10%
rule'?
A. 90% of the energy goes to the next level of the energy
pyramid.
B. 10% of the energy goes to the next level of the energy
pyramid.
C. Producers make up 90% of an ecosystem.
2) How does pH affect enzyme-controlled reactions?
Explanation:
Each enzyme has an optimum pH range. Changing the pH outside of this range will slow enzyme activity. Extreme pH values can cause enzymes to denature. Enzyme concentration: Increasing enzyme concentration will speed up the reaction, as long as there is substrate available to bind to.
What ribosomes do? Are they found freely floating in the cytoplasm or they are found attached to another organelle? Or both
Answer:
both
Explanation:
RNA is translated into protein on ribosomes. Protein synthesis is the name of this procedure. Large numbers of ribosomes are present in cells because protein synthesis is crucial to them. In addition to being attached to the endoplasmic reticulum, ribosomes also float freely in the cytoplasm (ER). So they re found in both.
What is a ribososme?Ribosomes, also called Palad granules (after their discoverer George Palade, for their granular structure), are macromolecular machinery found in all cells that perform biological protein synthesis (mRNA translation).Ribosomes join amino acids in an order determined by the codons of the messenger RNA (mRNA) molecule to form a polypeptide chain. Ribosomes are composed of two major components, the large and small ribosomal subunits.Each subunit is composed of one or more ribosomal RNA (rRNA) molecules and many ribosomal proteins (RPs or r-proteins).Ribosomes and related molecules are also known as the translational apparatus.The ribosome is a ribonucleoprotein complex because it is composed of a complex of RNA and protein.Each ribosome is composed of smaller (30S) and larger (50S) building blocks called subunits.
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3. Plants which were grown in the past and have been bred to adapt to a specific
environment defines which of the following?
A. Heirloom crops
B. Year-to-year crops
C. Organic crops
D. Rotation crops
Answer: A. Heirloom crops
All living things are composed of cells true or false
Answer:
True
Explanation:
everything is composed of cells Dead or Alive
Why is fundamental knowledge of biology necessary for everyone?
Answer: answer is in the explanation
Explanation:
1. Provide direct benefits to numerous industries
-Biology is a study of life that teaches us about others and the organic word around us. Therefore it is a broad science which can be used in a lot of industries like medicine, biochemistry and other industrial applications
2. Solvent various social and economic issues
-If you study biology in detail you would understand how it can quickly solve numerous social and economic problems
3. Provide an answer to fundamental questions on life
-This is another benefit of having fundamental knowledge in biology were this knowledge help us to understand basic things such us how the human body works
4. Get a better understanding of living beings and how they relate to the environment
If I was of help mark my answer as brainliest
Which muscle group supports the entire body?
A) Hips
B) Upper thigh
C) Legs
D) Feet
Answer: I think its hips.
Explanation:
Identify TWO environmental problems, other than the loss of biodiversity, that are occurring as a result of global climate change.
Answer:
Ice caps melting, increased heat causing droughts and wildfires
Two environmental problems other than the loss of biodiversity, that are occurring as a result of global climate change. that are occuring as a result of global climate change are as follows:
DesertificationDeforestationMost enviromental problems are majorly caused by climatic change though.
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the combination of chemical reactions through which an organism builds up or breaks down materials as it carries out its life process is called
Answer:
metabolism
Explanation:
25. How does a forest fire impact all of the other spheres?
Answer:
From my point of view ... firstly, forests are home to many animals, and this will lead to displacement of animals ... Secondly, forest fires lead to the loss of trees, which are the source of oxygen gas, and an increase in the proportion of carbon dioxide
Which of the following are adaptations of plants for photosynthesis?
A. thylakoid membranes stacked into grana
B. broad, flat leaves
C. stomata for gas exchange
D. xylem vessels for water transport to the leaves. E. All of these are adaptations for photosynthesis.
Answer:
I think it's (E) but I'm not sure
A mature ovum travels through the __________ where it may possibly become fertilized.
Answer:
Fallopian tubes
Have a great day!
In the anatomical position, the umbilicus and knees are on the:_____body surface.
Answer:
In the anatomical position, the umbilicus and knees are on the: anterior body surface.
which stores the most energy
Answer:
one gram of fat
Explanation:
Answer:
one gram of fat
Explanation:
Imagine a pool ball that bounces off of a bumper and
slowly comes to a halt. Explain what happened at each point in terms of applied
forces and energy transfer
Answer:
The kinetic energy is transferred from the ball to the bumper. The bumper gives the same energy back and the ball eventually stops due to friction of the ground.
Explanation:
Hope this helps y'all <3
When a ball bounces off of a bumper and slowly comes to a halt. The transfer of energy takes place from the ball to the bumper and the ball keeps on bouncing until all the energy is transferred.
What is Energy transfer?Energy transfer takes place when two objects comes in contact due to collision or bouncing. The energy from the moving body is transferred to the body in rest.
In the given situation, elastic potential energy is causing the ball to bounce, or rebound, because it is transformed into kinetic energy, which is then used to bring the ball back up.
When a ball is dropped, the gravity pulls ball towards the ground, which slows the ball down so with each bounce the height becomes shorter and shorter, until eventually the ball stops bouncing. On the other hand, the force of the ball hitting the ground puts an equal force back onto the ball which bounces the ball back up.
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is a hypothesis always correct? explain
please someone help in the metric system, what do kilogram, kilometer, and kilocalorie have in common?
Answer:
1.6 Kilometre is about 1 mile.1 metre is about 3 inches longer than one yard.1 kilogram is a little more than 2 pounds28 grams is about the same as one ounce.Ask me for further explanationAccording to the metric system, the common between kilogram, kilometer, and kilocalorie is as follows:
1 kilogram = 1000 grams (g). 1 kilometer = 1000 meters (m). 1 kilocalories = 1000 calories (cal). What is the Metric system?The metric system may be defined as a type of system that involves the weights and measures in which the meter is the unit of length and the kilogram is the unit of weight.
The metric system significantly represents the standard unit of each parameter like length, weight, temperature, distance, capacity, etc.
The kilogram, kilometer, and kilocalorie have their basic unit which is equal to 1000 times their actual one. This is the common among the all.
Therefore, the commonality between the kilogram, kilometer, and kilocalorie is that all have their basic units equal to 1000 times.
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