Answer:
This is a natural rock that is easily smashed into a fine white to off-white powder.
Explanation:
It has a particle size ranging from less than 3 um to more than 1 mm.
Hope it helps.
Iodine-131, a beta emitter, is one such product of nuclear fission, extremely dangerous because it is typically produced in huge quantities and because it is incorporated in the human body in the thyroid gland. The half-life of 1311 is 8.04 days. What fraction (expressed as a decimal number) of the 1311 produced in a nuclear accident would remain after 60.0 days?
Answer:
0.00568
Explanation:
Recall that the fraction of radioactive material left after a time (t) is obtained from the formula;
N/No = (1/2)^t/t1/2
Where;
N= mass of radioactive material left after a time t
No= mass of radioactive material initially present
t= time taken for N mass of radioactive substance to remain = 60.0 days
t1/2= half-life of the radioactive substance= 8.04 days
Note that the required fraction is N/No, hence;
N/No= (1/2)^60.0/8.04
N/No= (1/2)^7.46
N/No = 0.00568
Which is a frameshift mutation? a) Substitution B) Nonsense C) Silent D) Deletion
Answer:
C. the awnser is c homie
Explanation:
cause i know
How are the daughter cells produced by meiosis
different from those produced by mitosis?
Answer:
In mitosis, the daughter cells have the same number of chromosomes as the parent cell. But, in while meiosis, the daughter cells have half the number of chromosomes as the parent.
The daughter cells produced by mitosis are identical, whereas the daughter cells produced by meiosis are different because crossing over has occurred.
Explanation:
In mitosis, the cells of the daughter are as many chromosomes as the cell of the parent, and the cells of the daughter in meiosis are as many as the chromosome of the parent. Mitosis-generated daughter cells are similar, while meiosis-generated daughter cells are special as they cross.
Hope this helps!
How to grow taller? Please explain in great detail
Answer:
try to jump and reach high places like roofs this will help you greatly
Explanation:
Which statement about cellular respiration is true?
O It produces oxy
O It requires water
O It is used by every living cell.
O It converts energy to food.
1. . _____ ,_____ and _______ are the three substances present inside a cell.
Answer:
protein lipids and water
Explanation:
they are amongst the substances found in a cell
he most abundant element in the atmosphere can also be found in
Answer:
Beans and whey protein.
Explanation:
The most abundant element in the atmosphere is nitrogen, and both beans and whey protein contain nitrogen.
Hope this helps! :)
Answer:
All living organisms
Explanation:
The most abundant element in the atmosphere is nitrogen. All the living organisms including plants and animals have nitrogen. It is found in amino acids and is essential for growth.
Biology shows us the fossil record and comparative anatomies. Chemistry shows us that organic molecules can come from inorganic matter. Geology shows us that organisms that used to live together are found on separate continents due to continental drift.
Which fields of science provide evidence for evolution?
biology only
biology and chemistry only
biology and geology only
biology, chemistry, and geology
Answer:
biology, chemistry, and geology
Explanation:
Biology, chemistry, and geology are the fields of science that provide evidence for evolution, hence option D is correct.
What is the evidence of evolution?The uniformity of the fossil sequence from ancient to modern is possibly the strongest fossil evidence for evolution.
Fossils are a reflection of evolution and geological change due to their global distribution of organisms and distinctive traits of island species. The existence of species that are related to modern species but are now extinct is documented through fossils.
It is the series of slow, irreversible changes that occurred in early creatures over millions of years to give rise to new species we know today. Errors in DNA copying and sexual reproduction are mostly to blame for variations that led to the emergence of new species.
Therefore, biology, chemistry, and geology are the fields of science that provide evidence for evolution.
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For how many hours could an average person be sustained by the body's stored glycogen under resting conditions?
Answer:
The correct answer to the following question will be "12-14 hours".
Explanation:
Glycogen has always been processed throughout the skeleton's liver as well as muscle cells, which lead to the generation of power generation whenever the body can handle it. This seems to be a polyacrylamide, which represents the physical species as a type of power. This could be processed for 12-14 hours in repose throughout the living organism (human body).what causes competition in an eco system?
Answer:
Increasing members in the higher trophic level causes competition in an ecosystem.
Explanation:
For example, if there is a shortage of producers, the primary consumers will face a higher competition for food. Thus, many will die. Death of primary consumers will increase the competition in secondary consumers as they are left with less food options. This will go on till the tertiary consumer, and the competition will continue until each trophic level is balanced.
Answer: Competition in ecosystems.
Explanation:
Competition will occur between organisms in an ecosystem when their niches overlap, they both try to use the same resource and the resource is in short supply. Animals compete for food, water and space to live.
Which two phrases best describe cells?
A. Make up tissues
B. Made up of organs
C. The most complex level of organization of life
D. The simplest level of organization of life
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▹ Answer
A. Make up tissues
C. The most complex level of organization of life
▹ Step-by-Step Explanation
A is one of the correct answer choices since cells → tissues → organs → organ systems.
C is the second correct answer choice since cells have such an amazing structure that functions in surprising ways. Cells are our whole body and they function daily in our body, showing that it is very complex.
Hope this helps!
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Brainliest is greatly appreciated!
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plsss help me
Which of the following choices is not a result of Meiosis?
production of more cells
mix up of the combinations of alleles
recombination
combination
Combination is not a result of Meiosis because in meiosis cell division recombination of alleles occur.
What is meiosis?Meiosis is a type of cell division in which a single parent divides into four daughter cells having half number of chromosomes.. This type of cell division occurs in sex cells of an organism. In meiosis, a diploid cell is divided into haploid cells.
So we can conclude that Combination is not a result of Meiosis because in meiosis cell division recombination of alleles occur.
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The combination is not a term referred to the cell division process called Meiosis.
What is meiosis?Meiosis is a type of cell division that generates four daughter cells having half genetic material.
Meiosis generate four different germinal recombined cells, whereas mitosis generates somatic cells.
In conclusion, the combination is not a term referred to the cell division process called Meiosis.
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PART 1
which organelle is labeled A?
a. nucleus
b. vacuole
c. ribosome
d. mitochondrion
PART 2
which organelle is labeled E?
a. golgi apparatus
b. chloroplast
c. ribosome
d. nucleus
PART 3
which organelle is labeled I?
a. nucleus
b. mitochondrion
c. ribosome
d. chloroplast
PART 4
which organelle is labeled G?
a. cytoplasm
b. cell wall
c. cell membrane
d. vacuole
Answer:
Part 1: B. Vacuole
Part 2: A. Golgi apparatus
Part 3: D. Chloroplast
Part 4: C. Cell membrane
The answers to the following questions are:
Part 1: B. Vacuole
Part 2: A. Golgi apparatus
Part 3: D. Chloroplast
Part 4: C. Cell membrane
What are cell organelles?An organelle is a type of subcellular structure that, much like an organ in the body, is responsible for performing one or more specialized tasks within the context of the cell. The nucleus, which are responsible for storing genetic information, the mitochondria, which are responsible for producing chemical energy, and the ribosomes, which are responsible for assembling proteins, are some of the more essential organelles found in cells.
The nucleolus, the nucleus, the ribosome, the vesicle, the rough endoplasmic reticulum, the Golgi apparatus, the cytoskeleton, the smooth endoplasmic reticulum, the mitochondria, the vacuole, the cytosol, the lysosome, and the centriole are the major organelles and structures found within the cytoplasm.
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which are examples of negative feedback? Select three options.
Answer:
C- when someone's pancreas stops producing the hormone that lowers blood sugar because the person hasn't eaten recently
D- when someone’s pancreas hormone increases every time they eat, but decreases when they aren’t eating
E- when a person takes calcium supplements so a gland will stop secreting a hormone that pulls calcium from the bones
Explanation:
I got it right on my test!
ur welcome
The examples of negative feedback among the given options are 1. A child whose thymus gland is building an immune system that gets stronger each day.
3. When someone's pancreas stops producing the hormone that lowers blood sugar because the person hasn't eaten recently.
4. When someone's pancreas hormone increases every time they eat but decreases when they aren't eating.
Negative feedback is a regulatory mechanism in the body that works to maintain homeostasis by counteracting or reversing changes in the body's internal environment.
It helps to keep various physiological processes within a narrow range and prevent excessive fluctuations.
1, the child's thymus gland building an immune system that gets stronger each day is an example of negative feedback. As the child grows, the thymus gland stimulates the production of immune cells (such as T cells) to strengthen the immune system, which is a response to the body's needs.
3, when someone's pancreas stops producing the hormone that lowers blood sugar because the person hasn't eaten recently, it demonstrates negative feedback.
4, when someone's pancreas hormone increases every time they eat but decreases when they aren't eating, it also illustrates negative feedback. After a meal, the pancreas releases insulin to facilitate glucose uptake by cells, reducing blood sugar levels.
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Your question is incomplete, but most probably your full question was.
Which are examples of negative feedback? Select three options.
1. a child whose thymus gland is building an immune system that gets stronger each day.
2. when someone’s adrenal gland reacts to a scary movie by secreting hormones that make the heart beat quickly.
3. when someone's pancreas stops producing the hormone that lowers blood sugar because the person hasn't eaten recently.
4. when someone’s pancreas hormone increases every time they eat, but decreases when they aren’t eating.
5. when a person takes calcium supplements so a gland will stop secreting a hormone that pulls calcium from the bones
Why would you expect there to be fewer frogs than worms is this ecosystem?
What kind of carbohydrate does rice contain?
Answer:
Rice contain complex carbohydrates or starches.
In which biome would you expect to find warm to hot conditions with a large amount of moisture?
Tropical desert
Chaparral
Temperate forest
Tropical rainforest
A food web is represented below.
Mountain lion
Hawk
SS
Snake
23
Ow
Frog
Rabbit
Mouse y
Deer
Cricket
Shrubs
Grass
Trees
A continuous decrease in the size of the rabbit population would most likely cause a decrease in which other population?
Answer:
The frog population
Explanation:
Because the frogs will no longer have food to eat and might die from starvation. The decrease in the rabbit population affects them directly.
What is the basic unit of life? A. An atom B. A cell C. An organism D. An organ
Answer:
B. A cell
Explanation:
The cell is needed for every living organism and is one of the most basic units of life. Cells are like building blocks in an organism.
Hope this helped! :)
describe the full carbon cycle in detail
Answer:
The Carbon Cycle
Carbon moves from the atmosphere to plants. ... Plants to animals. ... Plants and animals to soils. ... Carbon moves from living things to the atmosphere. ... Carbon moves from fossil fuels to the atmosphere when fuels are burned. ... Carbon moves from the atmosphere to the oceans.Explanation:
The carbon cycle is the process in which carbon travels from the atmosphere into organisms and the Earth and then back into the atmosphere. Plants take carbon dioxide from the air and use it to make food. Animals then eat the food and carbon is stored in their bodies or released as CO2 through respiration.
Have a good day and stay safe!
Instructions on how to control your cells are contained in what part of the DNA?
A. Pentose Sugar
B. Phosphate group
Hydrogen bonds
D. Nucleotide bases
Answer:
D. Nucleotide bases
Explanation:
Hope it helps.
Nucleotide bases of the DNA contain the instructions on how to control cells.
How does DNA control cells?The hundreds of distinct types of proteins that are produced by cells are coded by the nucleotide sequences that make up DNA. These proteins control and regulate cell development, division, communication with other cells, and the majority of other cellular functions. This is the reason why nucleotide sequences found in DNA are referred to as carrying or storing information.Protein synthesis:
The sequences must first be "decoded," and the protein must then be translated. It is known as protein synthesis.
Transcription (first stage of protein synthesis): The process of copying information from a strand of DNA into a messenger RNA (mRNA) molecule is called transcription. DNA preserves genetic material as a reference or template safely and permanently in the cell nuclei.Translation (second stage of protein synthesis): The process of translation converts the information carried by messenger RNA from DNA into a string of amino acids. Essentially, it involves translating a code (nucleotide sequence) into another code (amino acid sequence).Learn more about protein synthesis here:
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Which of the following activities contributes most to climate change?
A. Running a mile
B. Heating your home
C. Reading a book
D. Turning on a light
Answer:
heating your house
Explanation:
it makes up the house's carbon footprint
During the process of _____, mRNA decodes information from the original DNA master plan to build proteins in the ribosomes. translation transcription replication
Answer:
translation
Explanation:
What challenges do you think parasites face in their survival? How can these challenges affect the parasite?
how does a gene effect the traits of a human
Answer:
They make you look like your parents. You can also do certain things like roll your tongue up or have dimples. It can also determine if you are left handed or right handed or eye color.
Hope this helps
Explanation:
What do does it mean to have a commercial market for space travel and what benefits could come from having one?
Answer:
The commercial market for space travel have generated multiple benefits for scientific experiments.
Explanation:
The flight of NASA astronauts onboard commercial spaceships to the International Space Station may be at risk, but the payoffs from low-cost flights to the orbital station and the increased experimental use of the microgravity environment are expected to be significant. Scientific studies, such as the production of vaccines, are now taking place onboard the space station, so providing more cost-effective means of entering earth orbit could fundamentally change other industries, such as medicinal and materials engineering.
As monoculture becomes more profitable, some crop varieties are threatened
with extinction. Which of the following would be the best solution to this
global economic problem?
O A. Creating an international seed bank to protect biodiversity
B. Establishing international agreements to prevent overfishing
C. Forming strict regulations on greenhouse gas emissions
D. Encouraging developing countries to participate in global trade
Answer:
A. Creating an international seed bank to protect biodiversity
Explanation:
Monoculture involves the growing or rearing of a particular crop or livestock for commercial purposes. This brings more profit due to the importance of such crops or livestock but it results to some crop varieties being threatened with extinction due to the crops not being grown.
The best option would be to create an international seed bank to protect biodiversity and ensure availability of the future planting of the crops.
Protein kinases are enzymes that act on other enzymes by adding phosphates groups. When the enzyme is phosphorylated, it changes its activity (it becomes more or less active, depending on the enzyme). This regulatory mechanism of enzymatic activity is called
Answer:
The regulatory mechanism of enzymatic activity is known as Phosphorylation
Explanation:
Phosphorylation usually results in a functional change of the target protein (substrate) by changing enzyme activity, cellular location, or association with other proteins.
Answer:
The feedback inhibition regulatory mechanism. They do this by causing phosphorylation of the other enzyme.
Explanation:
There are two ways by which enzymes can be controlled or regulated. This includes
1. Controlling the synthesis of the enzyme (this relates to a genetic control)
2. Controlling the activity of the enzyme (feedback inhibition).
In this example here, the protein kinases act on other enzymes by adding phosphates groups bringing about phosphorylation and controlling or regulating the activity of these enzymes. Thus, this type of regularly is the feedback inhibition regulatory mechanism.
Review the terms and their definitions in the Mini Glossary. Write a sentence that tells how
amplitude and frequency can describe a wave.
Answer:
A wave is a type of motion caused by water and wind that can cause a huge wave also depending on weather and it can be found in a beach at a ocean and more type of water places.
Explanation:
Waves that include both longitudinal and transverse movements include water waves.
Mini Glossary and wave;Particles move in clockwise rings when a wave goes through the waver. As the depth of the water grows, the radius of the circles shrinks.
A wave is a form of motion created by water and wind that can produce a large wave depending on the weather and can be found on a beach, in the ocean, and in other types of aquatic environments.
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What happens to the soil fertility if some Rhizobium bacteria are added to the soil? Explain your answer
Answer:
if rhizobium bacteria is added to the soil the soils nitrogen levels will increase.
this because that the rhizobium bacteria is able to convert atmospheric nitrogen into a more soluble form .plants arent able to absorb nitrogen directly from the air so the rhizobium helps the plants to obtain nitrogen.
Answer:
The soil will be rich in nitrogen salts and its fertility increases.
Explanation:
the bacteria fixes nitrogen level in the soil by converting nitrogen from the air into nitrogen salts and form nitrates that plants can use easily.