NEED ANSWER ASAP The presence of a large population of water lice in a water source indicates what about its pollution levels?
A. Organic pollution is moderate but declining. Oxygen levels are just beginning to increase.
B. Oxygen is plentiful, organic pollution is nearly absent.
C. Organic pollution is very high and oxygen has been depleted.
D. Oxygen levels are moderate, organic pollution is present but low.
The presence of a large population of water lice in a water source indicates that organic pollution is moderate but declining. Oxygen levels are just beginning to increase (option A).
What are indicator species?
Indicator species are living organisms that tells us about the pollution status of our environment (water, air, land) by being absent or present.
Examples of indicator species are as follows;
Water louse
Lichen
According to this question, there is an abundance of large population of water lice in a water body.
This could indicate that organic pollution is moderate but declining and oxygen levels are just beginning to increase because water lice are known to thrive in water bodies with moderate pollution.
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Using the strand mRNA below along with either of the codon charts, place the amino acids in the correct order.
Strand mRNA & codón chart: photo 2&3
1?
2?
3?
4?
5?
6?
7?
8?
9?
10?
Codons are triplets of nucleotides found on mRNA which code for particular amino acids .
What are codons?Codons are triplets of nucleotides found on mRNA which code for particular amino acids.
In an mRNA, strands, the first three codons, AUG code for the amino acid methionine.
Similarly, the codons GCA codes for alanine, CCA codes for proline.
In conclusion, given an mRNA strand, the amino acids coded by the codons can be deduced.
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1. a) Two nerve cells are shown below. In the drawing, label an axon, a dendrite, and a nucleus. Also
indicate where a
neurotransmitter would act. (4 points)
A nerve cell consists of a cell body or soma, a main fiber (axon) and many small branches (dendrites).
What is a neuron?A neuron or nerve cell forms the basic unit of brain and nervous system.These cells receive stimulus from the external world, relay the information to brain and help to generate a response.The neurons communicate with each other via special connections called synapses where they release neurotransmitter.A typical neuron consists of a cell body (soma), dendrites (brings information), and a single axon (send information away from neurons).The dendrites and axon branch out from the cell body.Cell body contains nucleus and specialized organelles.At the tip of axon are axon terminals where neurotransmitters are released to transmit signal across the synapse to other cell.Learn more about nerve cell here:
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2. How is modeling useful to scientists?
Answer:
scientific modeling, the generation of a physical, conceptual, or mathematical representation of a real phenomenon that is difficult to observe directly. Scientific models are used to explain and predict the behaviour of real objects or systems and are used in a variety of scientific disciplines, ranging from physics and chemistry to ecology and the Earth sciences.
Every plant has structures that function to help the plants survive. How does phototropism help a plant to survive.
A. The plant grows toward the sun so that its leaves can better make food.
B. It helps the plant leaves to eat the roots
C. It helps the plant drink nutrients
D. It helps the roots grow down to the dirt.
Answer:
A
Explanation:
more light energy means more photosynthesis = more food for the plant
what are the disadvantages of union in data structures
Answer:
there is,always union in every structure
How do DNA and mRNA vaccines produce spike proteins ? Drag each item into the correct category.
1. mRNA
______________________
2. DNA
_______________________
3. Both
_____________________
A. Has an artificial membrane to allow it into the human cell
B.completes the translation process to create spike proteins that mimic SARS-CoV-2 spike proteins
C.Is brought into a cell through an inactivated adenovirus
D.completes transcription prior to translation
DNA and mRNA vaccines produce spike proteins by completing the translation process to create spike one or more long mRNA will enter the muscle cells to create spike protein
mRNA uses muscles cells to produce spike proteinsThe DNA is recognized by the host's cell which produces the proteins Both uses cells to produce proteinsWhat are proteins?Proteins simply refers to those class of
any of a class of nitrogenous organic compounds which have large molecules composed of chains of amino acids
So therefore, DNA and mRNA vaccines produce spike proteins by completing the translation process to create spike one or more long mRNA will enter the muscle cells to create spike protein
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Which term describes how fast work is done?
A. Efficiency
B. Mechanical advantage
C. Force
D. Power
Answer:
A
Explanation:
function of mitochondria???
Answer:
Powerhouse of the cell, creates ATP (energy for the cell).
Explanation:
The process of creating an mRNA strand from one side of DNA is called:
A. Protein synthesis
B. Transcription
C. DNA replication
D. Translation
Answer:
It is TRANSCRIPTION option (b)
Which combinations of DNA could be present in a transgenic organism?
1. invertebrate animal DNA in mammal DNA
2. prokaryotic DNA in plant DNA
3. plant DNA in animal DNA
A) 2 only
B) 1 and 2 only
C) 1 and 3 only
D) 2 and 3 only
E) 1, 2 and 3
The correct option is D) 2 and 3 only
2. prokaryotic DNA in plant DNA
3. plant DNA in animal DNA
What is a transgenic organism?Transgenic refers to an organism or cell whose genome has lived changed by the introduction of one or more additional foreign DNA series from another species by synthetic means. Transgenic organisms are generated in the laboratory for analysis purposes.
Transgenic has been used in genetic investigations for an extended time. They were used to indicate that DNA is the molecule that carries the genetic code and that oncogenes can induce cancer. Transgenic animals have been generated to comprehend normal physiological processes such as metabolism and blood cell presentation. Transgenic animals have lived operated to model human diseases and to create new treatments. Transgenic crops include been produced that stand resistant to communicable diseases and grow faster.To learn more about the transgenic organisms, refer to:
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15. What's the requirement of every single natural process on Earth?
O A. Oil
O B. Trees
O C. Sunlight
O D. Energy source
O Mark for review (Will be highlighted on the review page)
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What process has increased pollutants and carbon dioxide in the atmosphere? geothermal heat
production hydroelectric
power production
using biomass fuels
burning fossil fuels
Burning fossil fuels has increased pollutants and carbon dioxide in the atmosphere.
What consequences do fossil fuel burning have on the environment?
Carbon dioxide, water, and energy are produced when fossil fuels are burned; this process is referred to as "combustion".
Burning fossil fuels like coal and oil has increased the amount of carbon dioxide in the atmosphere during the past century (CO2). This rise is brought on by the burning of coal or oil, which produces CO2 when airborne carbon and oxygen mix. When fossil fuels are burned, nitrogen oxides are released into the atmosphere and help to create smog and acid rain. Nitrogen oxides are the collective name for the most prevalent nitrogen-related substances released into the atmosphere as a result of human activity.
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What is the role of the EPA in water purification?
It provides guidelines to implement cleaning projects.
It forms laws and rules.
It deploys personnel for water purification.
It finds sources of freshwater.
2. What structure caused rotifers to be called wheel animals or wheel bearers?
1 the foot
2 the corona
3 the brain
4 the stomach
The structure that caused rotifers to be called wheel animals or wheel bearers is the corona.
Rotifers are also known as wheel animals or wheel bearers because of the corona structure around their mouth region.
Some rotifers are sessile and live inside tubes or gelatinous holdfasts that are attached to a substrate. Other rotifers migrate around a substrate through inch worming.
This is because when corona is seen in a sequential coordinated movement, it resembles the structure of a wheel, although it does not rotate in reality.
Therefore, we conclude that rotifers are called wheel animals or wheel bearers due to the presence of the corona structure.
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Hello! I am having trouble identifying the following images. I am unsure of what type of fungi or mold the organism is. Please share with me what you would identify it as and why. I would appreciate any feedback.
Be informed that the organism in the image which appeared above is a multicellular mold.
It can also be identified by its morphology in the culture medium
What are fungi?These are eukaryotic organisms which obtain their food heterotrophically. This means that they cannot obtain their food through the process of photosynthesis.
Generally, fungi could be either:
Unicellular i.e, singe celledMulticellularIn conclusion, the organism in the image which appeared above is a microscopic mold.
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Decrease in a person's life span is an example of ____
A. Adverse health effects
B. Hazard
C. Incidents
D. Risk
Answer: D. Occupational health and safety
MARK ME BRAINLIST
The sum of all chemical reactions that occur in an organism is
Answer:
It is called metabolism.
If a koala bear has sixteen pairs of chromosomes, what are the possible
combinations of genes that will be represented?
Answer:
Explanation:
All vombatid species have 2n = 14 chromosomes; the koala has 2n = 16, which G-banding studies suggest is derivable from a wombat-like karyotype by means of a simple centric fission in the equivalent of the submetacentric wombat second autosomal element
You have a pea plant with a yellow pea phenotype but do not know if the genotype is homozygous (YY) or heterozygous (Yy). What type of cross would you do determine the genotype of this plant and what would be the predicted phenotypes of the offspring?
To determine the genotype of this plant, a test cross should be performed. The expected phenotypes of the descendants are yellow and green peas.
What does test-cross mean?An F1 progeny is bred with a double (homozygous) recessive(green pea) mother generation to determine if an offspring is homozygous or heterozygous for a specific characteristic. A test cross is what this is called.
If the hybrid's mother is homozygous (YY) dominant, all of the hybrid's offspring will have the dominant (yellow) phenotype.
Mother yellow pea (YY) x green pea (yy) - P generation
Y y - Gamete
Yy (yellow) , Yy (yellow) -F1 generation
The ratio should be 1:1 if the mother is heterozygous dominant (Yy), in which case half of the kids will display the dominant phenotype, while the other half will display the recessive phenotype(yy).
Mother yellow pea (Yy) x green pea (yy) -P generation
Y, y y - Gamete
Yy (yellow) , yy (green) -F1 generation
The conclusion drawn from the foregoing explanation is that in order to determine the genotype of the pea plant, a test cross should be conducted. The expected progenies are - yellow and green peas.
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What are 3 questions that might be answered by studying earth and space science
Three questions that might be answered by studying earth/space science include the analysis of biotic factors, the presence of underground rivers and lithium in a mountain.
What is Earth science?Earth science is a scientific field that deals with Earth's characteristics, including biological features.
Earth science is aimed at comprehending how biological factors are maintained on the Earth planet.
In conclusion, questions that might be answered by studying earth/space science include biotic factors, underground rivers and lithium.
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mike is studying the phylogenetic tree for big cats. He made several statements about the tree. which statement is not true
Answer:
D. The leopard is more closely related to the tiger than to the snow leopard.
Explanation:
Leopards are more related to snow leopards than tigers.
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Why will other ecosystems be affected if freshwater ecosystems dry up?
Other ecosystems will lose access to fresh water.
Other ecosystems will lose the species that live there.
Other ecosystems will be flooded.
Other ecosystems will have to rely on salt water
Answer: a
Explanation:
Carrying capacity is the
population size of
the species that the environment
can sustain indefinitely, given
environmental necessities.
A. minimum
B. median
C. mean
D. maximum
Answer:
C. Mean
Explanation:
sir / ma your question isn't clear. That aside.
to know how population size of species affect the sustainability we find the mean carrying size(just a guess)
14. What organisms are similar to protists?
Archaeabacteria, eubacteria, and fungi
Plants, archaeabacteria and animals
( fungi, plants, and animals
Eubacteria, fungi, and plants
Answer: Bacteria and archaea are prokaryotes, while all other living organisms protists, plants, animals and fungi are eukaryotes. Many diverse organisms including algae, amoebas, ciliates (such as paramecium) fit the general moniker of protist.
Explanation:
Answer:
I hope this helps.
Explanation:
Exocrine glands
absorb hormones from the blood
absorb hormones from body surfaces
secrete hormones into the blood
secrete hormones into an attached duct
The Exocrine glands secrete hormones into an attached duct.
What do exocrine glands release?While the endocrine glands release their secretions into the bloodstream, the exocrine glands secrete their substances into other organs or to the outside of the body. Some examples of exocrine glands are: sweat glands (secrete sweat), mammary glands (secrete milk) and salivary glands (release saliva)
Glands are structures formed by epithelial tissue of the glandular type that are specialized in the synthesis and release of substances.
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Biology & Behavior: Evolution & Genetics
Why people behave the way they do?
People behave the way they do because of situation as well as genetics.
Why people behave the way they do?People behave as they do in response to the way they are treated by other people as well as in response to situation. In their behaviour, they have also a genetic factor that influence their behaviour.
So we can conclude that people behave the way they do because of situation as well as genetics.
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Which of the following is associated with schizophrenia?
Reduced fluid-filled sacs
Less gray matter
More brain tissue
"Normal" brain chemistry
Less gray matter is associated with schizophrenia and is denoted as option B.
What is Grey matter?These are usually darker tissues which are found in the brain and spinal cord. They contain a rich network of neurons present.
This is therefore the reason why schizophrenia is associated with mental health.
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Answer:
B. Less gray matter.
Explanation:
Took the test and got it right.
Have a nice day!
Which of the following greenhouse gases result from burning fossil fuels?
A. carbon dioxide.
B. methane
C. nitrous oxide.
D. All of these choices are correct.
Answer:
D. All of these choices are correct.
Explanation:
Greenhouse gases are gases that are trapped in the Earth's atmosphere and absorb energy. These gases, which include carbon dioxide, methane, and nitrous oxide, are all released when fossil fuels are burned.
Give one function for this structure
We are very happy to let you know that one function of the structure labelled from the image given here is that:
It is used for se- x -ual intercourse
In addition to the function above, the structure is also used for urination. That is, it used to pass out urine from the body
The structure is s it the pe- nis ( the male reproductive organ )
What is reproduction?Reproduction is one of the characteristics of living organisms which involves the giving birth to the young ones alive or reproduction of new offsprings
So therefore, we are very happy once again to let you know that one function of the structure labelled from the image given here is that:
It is used for se- x-ual intercourse
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