Most of the air we breathe is made of what molecule?
A. Carbon dioxide
B. Water vapor
C. Nitrogen
D. Oxygen
Answer:
C. Nitrogen
Explanation:
The composition of air is as follows:
nitrogen 78%
Oxygen 21%
carbon dioxide 0.03 %
water vapour 0.2 to 0.4 %
13. Which of the following drugs is not a hallucinogen?
A. Mescaline
B. PCP
C. Heroin
Genotype: BBee
Phenotype:
DONE
V fur and
V eyes
[tex]black \: dominant = BB \\ phenotype = black \: fur \\ \\ red \: eyes \: recessive = ee \\ (not \: masked \: b y \: the \: dom \: trait) \\ phenotype = red \: eyes[/tex]
Answer:
Explanation:
Genotype: BBee
Phenotype:
✔ black
fur and eyes
red
a student investigates the effect of different fertilizers on tomato plant growth. Identify the dependent, independent and controlled variables in her experiment.
Based on the nature of variables in the experiment:
plant growth is the dependent variablefertilizers is the independent variableSoil type and amount of sunlight is the controlled variablesWhat are variables?Variables in an experiment are those factors which are under the control of the researcher and in which changes in them result in changes in the result of the experiment.
In an experiment in which a student investigates the effect of different fertilizers on tomato plant growth, the various variables are given below:
plant growth is the dependent variable - this variable depends on a change in the independent variablefertilizers is the independent variable - changes in this variable results in changes in plant growthSoil type and amount of sunlight is the controlled variables- this variable is constant.In conclusion, tomato plant growth is dependent on the type of fertilizer.
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Which goals are more effective since they depend on factors that you can control?
Answer:
Explanation:
Endurance. Effective goals are demanding but achievable, is a description of what goalsetting principale. Set challenging and realistic goals. To restore energy levelss within the muscles and recover from fatique is a function of what principle. Rest.
The truck carrying heavy loads have more tyre.Give reason.
Answer:
the load carrying heavy vehicles have large number of wheels so that the pressure on the road is reduced due to larger contact area.
Also, using large number of wheels ensures that the force due to the load is shared among the tyres and no single tyre is under stress.
Answer:
The truck carrying heavy loads have more tyres as it needs a larger surface area to keep the truck balanced.
Explanation:
Hope It Helps!!!
The Y chromosome is much smaller than the X chromosome. What does this mean?
A. The Y chromosome takes up much more space than the X chromosome.
B. The X chromosome has more genes than the Y chromosome.
Answer:
A. The Y chromosome takes up much more space than the X chromosome
A mixture of 2 substances can be separated by BOTH the methods given below.
Method 1 - by sieving the mixture through a mesh
Method 2 - by adding water to the mixture and then filtering it through a filter paper.
What can the mixture be?
Answer:
one solid insoluble substance
one solid insoluble substance other different size.
Which of the following is TRUE?
A. There is no relation between humans and monkeys.
B. A monkey decided one day to just stand up.
C. Humans and monkeys share a common ancestor.
Transpiration is
A. the process of water rolling down
hill.
B. when plants evaporate water into
the atmosphere from their leaves.
C. when oceans move water to
different climates.
Answer:
Should be B
Explanation:
prove me wrong
Answer:
b
Explanation:
for sure..
..........
Give one function for this structure
Answer:
Explanation:
The pen is is the male organ used for urination and intercourse. The pen is located above the scrotum. It is made of spongy tissue and blood vessels. The shaft of the pen is surrounds the urethra and is connected to the pubic bone.
Which is not a water quality monitoring parameter?Select one:
a. habitat
b .turbidity
c. salinity
d. pH level
Habitat is not a water quality monitoring parameter.
There are three types of parameter used to determine the water quality.
Physical- Temperature, turbidity, Color and taste.Chemical- salinity, pH, COD and BOD.Biological- Most probable Number-MPN ( microbes) especially coliform bacterial count.Habitat is the one which doesn't comes under any of these three types, whereas turbidity is the physical parameter, salinity and pH are the chemical parameters used to check the quality of water
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Answer:
The answer is HABITAT.
hope it helps
what is the source of mold on bread
Answer:
Well, mold develops and grows eventually forming a colony due to spores landing on the bread and multiplying, hence growing the mold.
Where does mold on bread come from?
On bread, molds (many colonies of various sorts) develop from microscopic fungi that float in the atmosphere.
The fungus that causes mold develops as extremely little filaments called hyphae, which enable the fungus to float and be transported by the air. The hyphae spread by forming an apparent, hairy network when they land on bread or other organic materials. The color of the spores that develop on the end of the hyphae determines the color of the mold network .There are molds that grow as single-cell spores as opposed to mold that grows as multicellular hyphae with a spore at the end. They are known as yeast.
Thank you,
Eddie
True or false? Genes that are very far apart from one another on the same chromosome may be indistinguishable from genes on separate chromosomes in genetic linkage studies.
O True
O False
This is true that Genes that are very far apart from one another on the same chromosome may be indistinguishable from genes on separate chromosomes in genetic linkage studies.
The probability of two genes inheriting together increased depending on how close they were to one another on a chromosome. On the other hand, genes on the same chromosome that were more apart from one another were more likely to be split apart during recombination.
Every time a pair of genes on a chromosome that far apart crosses over, an equal number of parental and recombinant chromosomes are created.
Linkage is the propensity for genes on the same chromosome to pass down their mutations together.
Unlinked genes refer to genes that are spread across various non-homologous chromosomes.
Linked genes are genes that are found on the same chromosome.
The tendency to display full linkage indicates that genes near to one another are highly related.
Different chromosomes' genes frequently have insufficient linkage.
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Why human, monkey, horses and birds are considered to have evolved from the same ancestors?
Answer:
Everything at some point belonged to a common ancestor, but these four species are considered to be like this because of similar ancestral traits that have been passed on to generations such a homologous pairs, vestigial structures, they are all mammals, similar amino acid sequences, vertebraes, etc.
The use of propaganda as a way of exerting influence over others is what type of structural power?
Answer:
i think is the soft power
What is the dependent variable that impacts the amount of solar energy in a location?
A. Latitude
B. Longitude
C. Prime meridian
D. Equator
After watching the CrashCourse video on Taxonomy: Life's Filing System, write a summary of three things you
learned about taxonomy from the video. Zooalogy
Watching CrashCourse video, I learned the 3 basic elements of taxonomy, which are the three domains are Archea (formed by prokaryotic beings, such as archaea), Bacteria (formed by prokaryotic beings, such as bacteria and cyanobacteria) and Eukarya (formed by eukaryotic beings).
What is the concept of taxonomy?Taxonomy is the branch of biology responsible for identifying and classifying all animals and plants that inhabit the Earth, based on the different characteristics they share with each other.
What is taxonomy and examples?Taxonomy is the area of Biology that classifies, organizes and describes living beings. It is like a library that organizes each group into its categories, in an order that facilitates understanding and searching for features.
With this information, we can conclude that Taxonomy is a method used in biology to name, identify and classify living beings.
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What could a scientist do to determine what era the Eocene period belongs to on the geologic time scale?
learn what happened during Precambrian time
study information related to the Cenozoic era
view the timing of events in the Mesozoic era
research events that happened during the Paleozoic era
The Eocene occurred during the Terciaty period. To determine the era the Eocene period belongs to, a scientist should study information related to the Cenozoic era. Option B).
What is the Cenozoic?The Cenozoic is an era that covers the period from 65 million years ago to the present.
Significant events during the period,
During this era, there is a decrease in temperature (which until that moment was significantly higher than the current temperatures) and begins an aridity process.Since most cretaceous plant species got extinct, there is significant radiation of angiosperm and their consequent domain on the ground.
Following this diversification, different insects evolve following the different types of plants. Coevolution and pollination acquire protagonism.
During this period, mammals radiated too, originating in the current region of China.
Occurs the evolutive radiation of teleosts and birds.
The Cenozoic era includes the tertiary and quaternary periods.
⇒ Tertiary
Paleocene (65-55 my ago)Eocene (55-33 my ago)Oligocene (32-23 my ago)Miocene (23-5 my ago)Pliocene (5-2 my ago)
⇒ Quaternary
Pleistocene (2-0.02 my ago)Holocene (0.02 - 0 my ago)Since the Eocene occurred during the Terciaty period (Cenozoic era), to determine what era the Eocene period belongs to on the geologic time scale, a scientist should study information related to the Cenozoic era. Option B).
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why factors of production are important in promoting south Africa's economic growth and development
If businesses can improve the efficiency of the factors of production, it stands to reason that they can increase production and create higher quality goods at lower prices. Any increase in production leads to economic growth as measured by GDP.
1. What effect does the music have on the murals as Sierra and Robbie danced?
Answer:
The impact of murals: the process and the paintings.
In the US, in an average year, 20% of people will help their parents with their printer and 50% will carefully place a spider outside. What is the probability of the population that will both help their parents with their printer and carefully place a spider outside? (Type answer as a probability between 0 and 1)
Answer:
The probability would be 0.
The probability of the population will be 0.
What are the different types of population ?
A discrete groups of individuals with identifiable characteristics called a population.
It consists of a same group of species resides in a particular geographical location and interbreed there.
In a population not all individuals are able to survive and reproduce because of genetic variations in them.
Finite Population or countable population in which the population can be countable.
Infinite Population or uncountable population in which the counting if the population is impossible.
Existent Population of concrete individuals, whose unit is available in solid form.
Hypothetical Population whose unit is not available known as the hypothetical.
Most of the populations are unstable due to the presence of various physical factors and it act as limiting factors against exponential growth.
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What is a hypothesis?
A. A random guess
B. An educated prediction based on knowledge
C. A theory
D. A way for scientists to make up lies
Which parts of a plant are responsible for reproduction? Describe the role that each of them will play.
Describe what occurs during the process of seed development.
Based on your knowledge of flowers, why do you think most flowers are bright in color?
The parts of a plant that are responsible for reproduction are the flowers, they are present only in the most evolved group of plants called angiosperms. Flowers can be hermaphroditic or monoecious when they have both female (carpels) and male (stamens) structures.
Describe what happens during the seed development process.Germination is a succession of stages that resume the development of the embryo and the beginning of the formation of a new seedling. We can summarize germination as the process of transforming the seed into a new plant. The seed consists of the embryo, endosperm and integument.
Based on your knowledge of flowers, why do you think most flowers are brightly colored?Are mainly related to pollination by animals. This is due to the fact that the flower acts as a form of attraction for pollinators, therefore, mechanisms are needed to guarantee the visitation of these animals.
With this information, we can conclude that flowers inherit their appearance through genes. Pigments are born in these plants, producing a range of colors across the spectrum. The same chemical, carotenoid, that produces the pigment in tomatoes and carrots also produces the yellow, red, orange colors in certain flowers.
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Which are done by a plant's roots? Select three options. Ohold the plant in the ground keep the plant standing tall soak up nutrients soak up sunlight soak up water
Answer:
The plants root soak up nutritions and soak up water.
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Who do you believe is guilty of the murder? What evidence supports your conclusions? (4 points)
Right from time immemorial, guilty is considered a murder situation in as much as one as been confirmed truthfully responsible as what one as been charged of.
What is murder?This is a deliberate act of killing another being, especially human.This is a crime against humanity and it is punishable.
Guilty means to be responsible for a dishonest act especially judged to have committed a crime.
Evidence which shows that guilty is a murder is simply in the scriptural books such as the Bible and Qur'an. The judge in his book too has whatever one is guilty of as a murder in his book.
So therefore, right from time immemorial, guilty is considered a murder situation in as much as one as been confirmed truthfully responsible as what one as been charged of.
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Answer:
Steve O'Hare
Blood Type Match
Explanation:
The murderer was the boss, Steve O'Hare, because the blood on the door matched his blood, so he possibly struggled to kill her and she was able to hit him or try to defend herself which is possibly why his blood was on the door
The tyres of tractor are wide and large .Give reason.
Maybe this is the answer
What is used as evidence to develop a phylogenetic tree?
A. the fossil record
B. only living organisms
C. drawings of older species that are extinct
A phylogenetic tree is the representation of the evolutionary relationships among species. The fossil records are used as evidence to develop a phylogenetic tree. Thus, option A is correct.
What is a fossil record?A fossil record is a depiction of the organisms that shared common ancestors and depicts the change in the structural and functional unit of the organism over many years of time.
They are used to illustrate the phylogenetic tree to show the morphological, structural, chemical, anatomical, etc variations in species that shared ancestry.
Therefore, option A. fossil records are used to show the common ancestry at the nodes.
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Answer: A. the fossil record
Explanation:
Which of the following correctly defines sustainability?
O
о
Promotes and maintains conditions under which nature and
humans can co-exist indefinitely
Promotes the management of a variety of species in a particular
habitat
O The objective study of humans and their environment
O
The observation of interdependence among biological organisms
within a specific environment
Answer:
Promotes and maintains under which nature and humans can co-exist indefinitely
Explanation:
The ability to sustain something is known as sustainability.
ecology defines it as a means of configuring civilization and human activity so that society, its members and its economies are able to meet their needs and express their greatest potential in the present, while preserving biodiversity and natural ecosystems, planning and acting for the ability to maintain these necessary resources for future generations.
What is the purpose of DNA inside a cell
Answer:
DNA contains the instructions needed for an organism to develop, survive and reproduce
