Explanation:
it shields humans and other living things from ultraviolet rays
A scientist is studying a radioactive element that has a half-life of 63 years. Choose the correct answers from the drop-down menus to complete each statement about the element.
It will take
blank
years for half of the sample to decay.
In 189 years, blank
of the sample will be left.
Scientists can figure out how old a sample is by multiplying the blank
by the length of the half-life.
Answer:
It will take 63 years
In 189 years, one-eight of the sample will be left
By multiplying the number of half-life cycles
Explanation:
I just completed this assignment.
A scientist is studying a radioactive element that has a half-life of 63 years. It will take 63 years, In 189 years, one-eight of the sample will be left.
what is the meaning of half life ?A radioactive element is defined as the material when it changes its atomic number or weight by emitting energy, the energy may be either Alpha, beta, or gamma forms of radiation.
Alpha is a Helium nucleus, a beta particle is an electron and a gamma is high energy electromagnetic radiation. Half-Life can be defined as the time required by which the radioactive substance to split into a different substance.
The half life was first discovered by Ernest Rutherford and represented by the Ug or t1/2, If the radioactive element has one-hour of half-life, it means one half of the element would decay within an hour and the remaining part would decay in another hour.
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At what stage of the cycle does the cell copy its DNA?
Answer:
S-Phase
Explanation:
During the S-Phase, the cell replicates its DNA. Interphase is then followed by Mitosis. Mitosis is when the cell separates its two sets of DNA and divides it into two more cells.
Outputs of photosynthesis
Answer: carbon dioxide, water molecules, glucose, and oxygen
Explanation: Energy is used to convert carbon dioxide into oxygen and glucose.
Sound waves are waves that require particles to vibrate, Sound waves
cannot
a.travel around corners
b.move through solids
c.be heard underwater
d.transmit through empty space
hodieram
Answer:
d. there's nothing for Soundwave to bounce off of I believe
what is this pls help these are finals
Answer:
wowzerrrrrrs
Explanation:
Albino individuals lack all pigmentation so that their hair and skin are white. The
transmission of Albinism is shown on the pedigree below.
According to the pedigree, what is the mode of inheritance for this condition?
Who were the representatives
sent to work on the deal?
Answer:
Peace Negotiations
After Yorktown, the Continental Congress appointed a small group of statesmen to travel to Europe and negotiate a peace treaty with the British: John Adams, Benjamin Franklin, John Jay, Thomas Jefferson and Henry Laurens.
struggling in bio h e l p
Answer:
d maybe but im still figuring it out
Explanation:
Answer:
D
Explanation:
what was the problem with reusing contaminated water from other parts of the mill to extinguish the coke fires? From the book ‘When smoke ran like water’
Answer:
1. The problem with that was that the already poisonous water was made worse after using it to quench the flames from coke production.
2. It contaminated the soil, making it difficult for plants to grow.
Explanation:
As the author described the last stages of coke production, she explained that water was needed to quench the very hot flames from coke production. A 'bright fellow' suggested using dirty water from other parts of the mill to quench the flames from the coke production. The problems with this were;
1. The already contaminated water was made worse after it was used to quench the flames from coke.
2. Mrs. LaMendola noted that she was unable to grow her tomatoes in the path where the plumes from the oven ran. So the contaminated water negatively affected the soil.
The problem that should be already poisonous water is also made worse when it quenches the flames at the time when the production of the coke should be done.
Also, it contaminated the soil also it is difficult for growing the plants.
The problem of reusing contaminated water:Since the author explained the last coke production stage so here the water required to quench that it should be very hot flames arise from the coke production. Also, the contaminated water should be worse whenever it is used for quenching the flames. Also, the contaminated water does not positively impact the soil.
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Which human body system performs a function similar to that of the vascular
system of a plant?
Write a summary statement for saturated fats including whether they are solids or liquids at room temperature and weather they have all single carbon-to-carbon or at least one carbon-to-carbon bond
Answer:
A saturated fat is a type of fat in which the fatty acid chains have all or predominantly single bonds. A fat is made of two kinds of smaller molecules: glycerol and fatty acids. Fats are made of long chains of carbon atoms. Some carbon atoms are linked by single bonds and others are linked by double bonds. Double bonds can react with hydrogen to form single bonds. They are called saturated because the second bond is broken and each half of the bond is attached to a hydrogen atom.
Explanation:
Answer:
saturated fats consists of single covalent bond and they are solid at room temperature and their melting point increases with increasing chain length
hope it helps
Explanation:
Cells reproduce by splitting in half a process called cell division what do you cells need between divisions to make sure that they don’t get smaller and smaller
What happens if oranisms fall to adjust and respond to changes in their environment?
Answer:
they would probably go extinct
Explanation:
PLZ HELP ASAP WILL GIVE BRAINLIST!
Pick all the differences between prokaryotic (bacteria) and eukaryotic (animals,
plants, fungi) cells.
Prokaryotic cells do NOT have membrane bound organelles.
Eukaryotic cells do NOT have membrane bound organelles.
Prokaryotic cells do NOT have a nucleus.
Eukaryotic cells do NOT have a nucleus.
Answer:
Prokaryotes are organisms that consist of a single prokaryotic cell. Eukaryotic cells are found in plants, animals, fungi, and protists. They range from 10–100 μm in diameter, and their DNA is contained within a membrane-bound nucleus. Eukaryotes are organisms containing eukaryotic cells.
Explanation:
Answer: B
Explanation:
Which one is the correct answer?? The lined squares in the Punnett square represent____.
They represent the parent's genotypes.
All substances are built from
compound
oxygen
metals
atoms
Answer: All substances are built from
compound
oxygen
Explanation:
All substances are built from atoms as atoms are the basic building blocks of matter and are the smallest units of a chemical element. The correct option is D.
Atoms form the basis of all compounds. The fundamental building blocks of matter, atoms are the smallest units of a chemical element that nonetheless retain that element's chemical characteristics.
Atoms from various elements combine chemically to produce compounds, however compounds themselves are not the basic building blocks.
Although oxygen is an element that is present in several substances, it is untrue to say that oxygen is the primary component of all substances.
Although metals are a specific kind of element, not all substances are made of metals. Thus, the most correct response is that all substances are composed of atoms.
Thus, the correct option is D.
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Your question seems incomplete, the probable complete question is:
All substances are built from
A. compound
B. oxygen
C. metals
D. atoms
The plates include the lithosphere under the oceans true or false
Answer:
A tectonic plate (also called lithospheric plate) is a massive, irregularly shaped slab of solid rock, generally composed of both continental and oceanic lithosphere. So i think its True
Which two cell types in placozoans make up the endoderm tissue layer?
A)cover cells and cylinder cells
B)gland cells and cover cells
C)fiber cells and cover cells
D)gland cells and cylinder cells
Answer:
D
Explanation:
I made a 100 on the text
Two cell types in placozoans make up the endoderm tissue layer are - D) gland cells and cylinder cells.
The Placozoa a marine free-living multicellular basal form of organism. These are condisered as the simplest structure of all animals.
It has three genera namely Trichoplax adhaerens, Hoilungia hongkongensis, and Polyplacotoma mediterranea.It has three tissue layers that are ectoderm, endoderm and mesoderm.The ectoderm are formed of cover cells.The bottom layer is made up of cylinder cells that has cilia used in locomotion, and gland cells that lack cilia.Thus, two cell types in placozoans make up the endoderm tissue layer are - D) gland cells and cylinder cells.
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Who is the inventor of the modern classification system?
Answer:
Carolus Linnaeus
Explanation:
Answer:
Carolus Linnaeus
Explanation:
Paragraph about Photosynthesis
Answer:
Photosynthesis is the process of making food by green plants in the presence of sunlight.
Explanation:
During Day, sunlight enters through stomata and carbon dioxide from air and water forms glucose and oxygen. This process is photosynthesis.
What makes something a compound microscope
Answer:
A compound microscope is an upright microscope that uses two sets of lenses (a compound lens system) to obtain higher magnification than a stereo microscope. A compound microscope provides a two-dimensional image, while a stereo microscope provides a three-dimensional image.
Explanation:
Messenger RNA carries a(n) ___________ of the DNA’s instructions out of the nucleus to the ___________.
Answer:
transcript and ribosome
Explanation:
I know this for sure
What is a natural source of CO2
Answer:
venting volcanoes
Explanation:
Which of these groups contains single-celled organisms?
A. birds
В. plants
C. fungus
D. animals
Answer:
C. Fungus
Explanation:
The fungi kingdom includes both single cell and multicellular organisms. Single cell organisms in the fungi kingdom include yeasts and chytrids, or fossilized fungi. Most organisms within the plant and animal kingdoms are multicellular. The Largest Single-Celled Organism.
hope i helped
Answer:
C. fungus
Explanation:
Birds and animals are in the same category, and both have multiple cells.
Plants also have multiply cells.
And fungus can be single celled or multiple cells.
Hope this helps ya!!
what are the inputs and outputs of the reaction
Answer:
The inputs are carbon dioxide from the air and the ATP and NADPH produced by the light reactions. The cycle's output is an energy-rich sugar molecule. The Calvin cycle uses carbon from the carbon dioxide, energy from the ATP, and high-energy electrons and hydrogen ions from the NADPH.
Explanation:
The light reactions, which occur during photosynthesis, have specific inputs and outputs. The inputs of the light reactions include light energy and water. The outputs of the light reactions are ATP (adenosine triphosphate), NADPH (nicotinamide adenine dinucleotide phosphate), and molecular oxygen.
Light energy is absorbed by the chlorophyll pigments in the thylakoid membranes, while water molecules serve as a source of electrons for the photosynthetic electron transport chain.
ATP is a high-energy molecule that serves as the primary energy source for cellular processes. NADPH is a coenzyme that carries energized electrons and plays a role in the synthesis of carbohydrates during the subsequent dark reactions of photosynthesis. Molecular oxygen is a byproduct of light reactions and is released into the atmosphere as a waste product. Together, these outputs provide the energy and reduce the power needed for the synthesis of organic molecules during photosynthesis.
Therefore, the inputs of the light reactions include light energy and water. The outputs of the light reactions are ATP (adenosine triphosphate), NADPH (nicotinamide adenine dinucleotide phosphate), and molecular oxygen.
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Fill in the blanks
Human activities have altered many natural environments by _____. Many lands are now fields where only one from farm crop is grown, an example of a (n) ____.
Other human activities had added many ____ to the atmosphere some of which cause an ugly Haze called _____ or damage the protective ____. A consequence of global transportation has been the spread of _____ that outcompete or prey on native species.
Use these to fill in the blank:
Monoculture
Invasive species
Pollutants
Ozone layer
Smog
Deforestation
Answer:
1st line:Deforestation
2nd line:monoculture
3rd line:pollutants
4th line:Smog
5th line:Ozone layer
6th line:invasive species
All in that order for each line.
Answer:
1st line:Deforestation
2nd line:monoculture
3rd line:pollutants
4th line:Smog
5th line:Ozone layer
6th line:invasive species
All in that order for each line.
Explanation:
CELLULAR RESPIRATION!!!
Explain what cellular respiration is using the vocabulary words: cellular respiration, energy, matter, and chemical reaction. Make sure to describe how the cell gets the matter and energy needed.
Why must an organism be able to adjust to changing environments?
Answer:
blabkkbkkbcqcwwcqwqwwq
Explanation:
which of the following cells shows the process of a nucleus? a. prokaryotic b. eukaryotic c. both
Answer:
b. eukaryotic
Explanation:
"Eukaryotic" means to have a nucleus.ASAP?!!!!!!!!!!!!
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What is the genotype ratio for this cross?
What is the phenotype ratio for this cross?
Answer:
If I'm not mistaken, the genotype ratio should be 1:2:1 and the phenotype ratio should be 3:1
Explanation:
Genotypic Ratios and Phenotypic Ratios for Punnett Squares on Y*uT*be