Answer:
Giardia
Explanation:
The half-life of potassium-40 is 1.3 billion years. If a rock specimen contained 1g of
potassium-40 when it was formed, how much potassium-40 would be left if the rock is 2.6
billion years old?
Answer:
2.6 billion years
Explanation:
There are essentially two ways of solving nuclear half-life problems. One way is by applying the half-life formula, which is
A
(
t
)
=
A
0
(
t
)
⋅
(
1
2
)
t
t
1
2
, where
A
(
t
)
- the quantity that remains and has not yet decayed after a time t;
A
0
(
t
)
- the initial quantity of the substance that will decay;
t
1
2
- the half-life of the decaying quantity;
In this case, the rock contains
1/4th
of the orignal amount of potassium-40, which means
A
(
t
)
will be equal to
A
0
(
t
)
4
. Plug this into the equation above and you'll get
A
0
(
t
)
4
=
A
0
(
t
)
⋅
(
1
2
)
t
t
1
2
, or
1
4
=
(
1
2
)
t
t
1
2
This means that
t
t
1
2
=
2
, since
1
4
=
(
1
2
)
2
.
Therefore,
t
=
2
⋅
t
1
2
=
2
⋅
1.3 = 2.6 billion years
A quicker way to solve this problem is by recognizing that the initial amount of the substance you have is halved with the passing of each half-life, or
t
1
2
.
This means that you'll get
A
=
A
0
2
after the first 1.3 billion years
A
=
A
0
4
after another 1.3 billion years, or
2
⋅
1.3 billion
A
=
A
0
8
after another 1.3 billion years, or
2
⋅
(
2
⋅
1.3 billion
)
On the Galápagos Islands, Charles Darwin observed Question 1 options: completely unrelated species on each of the islands. species exactly like those found in South America. species similar to mainland South American species. species completely unrelated to those found in South America.
We can confirm that on the islands, Charles Darwin observed species similar to mainland South American species and to those found on the other islands.
What did Darwin notice about these species?Darwin noticed that each of these species were very similar, but possessed slightly different traits. These traits seem to perfectly fit the needs of each species for their specific island, leading to his creating the theory of evolution through natural selection.
Therefore, we can confirm that on the islands, Charles Darwin observed species similar to mainland South American species and to those found on the other islands.
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what dose the word milestone mean
Answer:
it is a stage in life
Explanation:
because it shows how one has progressed or developed
Play the spectrogram at normal speed and slowed down. How many calls did the bats make?
Answer:
Bat echolocation calls vary in their dominant frequency approximately between 11 kHz (e.g. Euderma maculatum; Fullard & Dawson 1997) and 212 kHz (Cloeotis percivali; Fenton & Bell 1981). Most insectivorous bats call with dominant frequencies between 20 kHz and 60 kH
Why would a cancer cell need to induce angiogenesis? 1.53
Answer:
Why is angiogenesis important in cancer? Angiogenesis plays a critical role in the growth of cancer because solid tumors need a blood supply if they are to grow beyond a few millimeters in size. Tumors can actually cause this blood supply to form by giving off chemical signals that stimulate angiogenesis.
why is it beneficial for scientists to understand how other organisms are able to edit their RNA
Answer:
Many see RNA editing as an important alternative to DNA editing using techniques such as CRISPR.
Explanation:
It is beneficial for scientists to understand how other organisms are able to edit their RNA because it gives an idea for scientists in order to identify particular causes and symptoms of genetic and environmental disorders among individuals.
What is RNA?RNA stands for ribonucleic acid. It may be characterized as a type of nucleic acid that is significantly present in all living cells. It expresses some structural and functional similarities to DNA. There are major three types of RNAs found. It includes mRNA, tRNA, and rRNA.
There are various techniques that help scientists to observe numerous RNA and its editing in organisms. It is an important alternative to DNA editing. This methodology of RNA editing and functionality is determined by using techniques such as CRISPR.
Therefore, it is beneficial for scientists to understand how other organisms are able to edit their RNA because it gives an idea for scientists in order to identify particular causes and symptoms of genetic and environmental disorders among individuals.
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What is basal cell carcinoma and what does it look like?.
Answer:
Basal cell carcinoma is a type of skin cancer that most often develops on areas of skin exposed to the sun, such as the face. On brown and Black skin, basal cell carcinoma often looks like a bump that's brown or glossy black and has a rolled border. Basal cell carcinoma is a type of skin cancer.
Brown hair is dominant and blonde hair is recessive.
The parents have the following alleles.
Bb
Bb
What color hair do the parents have?
A. One has blonde and the other has brown
B. Brown
C. Blonde
d. unable to determine
Given what we know, we can confirm that the parents have brown hair.
This has to do with how dominant alleles work. When an allele is dominant, it is because, in the presence of mixed alleles, this trait will always be the one reflected in the phenotype of the individual. Since the parents possess an allele for brown hair and one for blonde, but brown hair is dominant, both parents will have brown hair.
Therefore, we can confirm that both parents will have brown hair due to the dominant nature of the brown hair allele.
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Who would have first made this statement while observing cork under a microscope?
"The cork looks like little rooms, or cells.”
Hooke
Schleiden
Leeuwenhoek
Virchow
Answer:
Robert Hooke
Explanian
Hooke observed a thinly sliced piece of cork under a microscope and noticed they looked like the cells that monks would sleep in. That's why cells were given their name!
Very fast brainlist
One person consumes the equivalent of five cows per year. Five cows consume a total of 39 million Calories of vegetation per year. One person only needs one million Calories a year to survive. Which statement best describes the efficiency of energy transfer in this scenario?
It is very efficient because the person can eat less.
It is inefficient because less energy is needed at the top.
It is very efficient because most energy is made by producers
Only a portion of energy from vegetation makes it to a person.
Answer:
It is very efficient because the person can eat less.
Explanation:
the common knowledge answer
Only a portion of energy from vegetation makes it to a person. The correct option is D.
What is energy efficiency?The definition of energy efficiency is the use of less energy to carry out a task or achieve a goal.
Ecological efficiencies at each trophic link determine the food chain efficiency (FCE), which is calculated as the percentage of energy fixed by primary producers that is transmitted to the top trophic level.
The energy supply accessible to trophic level N+1 divided by the energy used by trophic level N is the definition of ecological efficiency.
Only a percentage of the energy from vegetation makes it to a person, which best sums up the efficiency of energy transmission in this situation.
Thus, the correct option is D.
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Explain the characteristics scientists use when observing organisms and placing them in six kingdoms
Answer:
Classification of organisms is done while considering many factors such as:
Cell type- whether the organism is prokaryotic or eukaryotic
Cell structure- This includes both the presence and composition of the cell wall
Body type- whether the organism is multicellular or unicellular
Mode of nutrition- the method through which the organism achieves its nutritional requirement, by consuming other organisms (heterotroph) or making its own food (autotroph)
Explanation:
i beleve this is what you where asking :)
What are the four features of minerals? (use complete sentences and your own words.)
(NO LINKS PLEASE)
Answer:
1)All minerals are naturally occuring.
2)They have to have a crystalline structure and a definite chemical composition.
3)They are inorganic.
4)They are a solid.
Explanation:
1-You have to find a mineral in the nature. It cannot be created in a lab.
2-Crystallline structure is the ordered arrangement of ions, molecules, or atoms in an object.
3-Inorganic means that the object has not bonded with carbon.
4-Solid means that it is not fluid and is hard and stable.
Hope this helps! :)
Examine the words and/or phrases below and determine the relationship among the majority of words/phrases. Choose the option that does not fit the pattern.
A. ash
B. dissolved gases
C. silica content
D. temperature
The only word among the available words that do not fit the pattern would be temperature.
Words and relationshipAsh, dissolved gases, and silica content are similar in the way that all of them are made up of matter.
Matter refers to any substance with weight and is able to occupy space. Ash is made from solid particles. dissolved gases are gases, and silica contents are also from solids.
Temperature, on the other hand, is a scalar quantity. It is not something that can be held or seen. It has no weight and neither does it occupy space.
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A Gram + bacterium that inhibits the growth of other Gram + bacteria is an example of what?
Answer:
The selenium particles when coated on paper towels were extremely effective and continuously inhibited (about a 90% reduction) the growth of gram-positive bacteria including S. aureus and S. epidermidis after 24, 48, or 72 hours.
According to cell theory, which are made of cells? Check all that apply.
kitten
bacteria
cactus
mushroom
rock
Answer:
Kitten
Cactus
Mushrooms
Bacteria
so all but Rock
Because only living things have cells
Different________show very different characteristics or variations, however you can also have_______within the same species.
A. Evolutionary animals, major differences
B. Species, variation
C. Animals, subspecies
D. Evolutionary animals, subspecies
Amoebae move and engulf food by using pseudopodia, which is Latin for ___ ____
(two words)
Answer:
false feet
Explanation:
PLEASE MARK ME AS BRAINLIEST AND HAVE A NICE DAY :)
can someone please write one for me or show me different websites to help write one please
Answer:
One Act Example
Shakespeare, Clearly: Romeo and Juliet (one-act)
by Jon Jory
adapted from William Shakespeare
Drama
One-act. 30-35 minutes
8-30 actors
In Shakespeare's most well-known tragedy, two young star-crossed lovers’ deaths ultimately reconcile their feuding families. This straightforward adaptation mixing contemporary and classical language emphasizes story and character rather than the poetry. Master director and acclaimed playwright Jon Jory has reimagined the classic tale to serve as an early introduction for younger audiences and actors that allows easy involvement. Inventive yet faithful, this adaptation will inspire actors and audiences alike to revisit Shakespeare’s original texts. Gender-neutral casting is encouraged and doubling is possible. Simple stage allows for a fluid and forward moving production.
Procedure:
ONE ACT STRUCTURE
Set the Scene.
Introduce the character goal(s)
Introduce an obstacle to the achievement of the goal(s)
Introduce a disaster (the result of a twist if your story has one)
Let the character(s) react.
Resolve the story.
-Oct 17, 2017
Explanation:
how would you go about a driver who is driving recklessly on the free way or any road you encounter
Answer:
Drive from as far away from them as possible. Attempt to speed past them.Or, call the police.The cellular machinery responsible for protein synthesis is the:.
What is an example of a population with the ingredient for species? Would it be evolution?
All members of a species that dwell in the same region are referred to as a population. You are a member of your hometown's human population. A freshwater pond is home to a variety of species, including mallard ducks and cattail plants growing on the pond's border. Basically, a population is a collection of individuals of the same species that live in the same geographic region and interbreed. Many animals have several populations that are spread across a wide range of geographic locations.
5. What are the outputs of photosynthesis?
glucose and oxygen
water and carbon dioxide
energy and water
carbon dioxide and glucose
[tex]\huge\mathcal\pink{ANSWER} [/tex]
[tex] \mathsf \purple{glucose \: and \: oxygen}[/tex]
Answer:
Glucose and oxygen
Explanation:
Photosynthesis is a natural food making process that occurs in plants.In the process(in the leaves of plants) carbon dioxide reacts with water containing minerals in the presence of sunlight(which was trapped by the chloroplast) to produce oxygen and glucose.
What is the difference between B-cell lymphocytes and T-cell lymphocytes?
B cells regulate blood pH, and T cells regulate body temperature.
B cells are produced in the thymus, and T cells are produced in the bone marrow.
B cells engulf bacteria, and T cells carry bacteria to the lymph nodes.
B cells produce antibodies, and T cells destroy infected cells.
Answer:
B cells and T cells are the white blood cells of the immune system that are responsible for adaptive immune response in an organism. Both the cells are made in the bone marrow.Explanation:
B cells produce antibodies, and T cells destroy infected cells. So, the correct option is D.
What are B cells and T cells?The two primary categories of lymphocytes are T cells and B cells. Antibody molecules made by B cells can attach to and kill invasive viruses and bacteria. T cells are the immune system's first line of defence against foreign invaders. They also create cytokines, that are biological agents that aid in the activation of other immune system components.
T cells can eliminate malignant or contaminated cells. Moreover, they control overall immune response by assisting B cells in eradicating foreign infections. Antibodies are made by B cells. An antibody is a class of protein produced by B lymphocytes, sometimes known as B cells.
Therefore, the correct option is D.
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T A C G T G G A C T G A G G A C T C C T C is this a 'sense' strand or 'antisense' strand?
The information provided is NOT sufficient to indicate if the TACGTGGACTGAGGACTCCTC sequence is a 'sense' strand or 'antisense' strand.
What is a sense DNA strand?DNA is a double helix molecule composed of two long chains of nucleotides linked by hydrogen bonds.
During transcription, the sense DNA strand is actively used as template to produce a complementary RNA molecule.
In consequence, it is required to know the sequence of the resulting RNA to determine if the sequence above belongs to a 'sense' strand or 'antisense' strand.
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Answer:
C
Explanation:
Which sustainable building practice does the photograph show?
A. Using a green roof to capture carbon and reduce a building's
energy costs
B. Reusing old bottles and cans as insulating building materials
C. Reducing fossil fuel consumption and its associated pollution
D. Replacing wilderness with buildings to reduce the absorption of
carbon dioxide
Reusing old bottles and cans as insulating building materials is the sustainable building practice. Therefore, option (C) is correct answer.
Sustainable building practices aim to minimize the environmental impact of construction and operation of buildings while enhancing the health, well-being, and productivity of occupants. These practices involve incorporating environmentally responsible methods and materials into the design, construction, and operation of buildings.
Therefore, reusing old bottles and cans as insulating building materials is the sustainable building practice.
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Can someone help me please
Answer:
What subject is it, and could you please show the formula?
Explanation:
Answer:
I can but umm I don't understand so sorry
Explanation:
I can't read that and don't know what it is about
True or false? All cells share four key components: plasma/cell membrane, ribosomes, DNA, and cytoplasm.
Answer: True
Answer:
TRUE
Explanation:
Brainliest
Discuss the relationship between Gibbs free energy, redox reactions and cellular respiration in mitochondria.
Cellular respiration is a redox process that mainly occurs in mitochondria, whereas Gibbs's free energy refers to the energy in a closed system.
What is cellular respiration?Cellular respiration refers to the oxide reduction reactions (redox) associated with the production of energy in aerobic cells.
Cellular respiration occurs in the cytoplasm (glycolysis) and mitochondria (Krebs cycle and oxidative phosphorylation).
Finally, in thermodynamics, the Gibbs free energy refers to the energy generated in a closed system.
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If a person with Klinefelter’s syndrome wanted to look more like an average male, what medical treatment could help accomplish this?
Which taxonomic group will have organisms that share
the most