4. Which of the following would be the best control sample for the study?
A)
A sample of water collected just downstream of the southern forest
(B) A sample of water collected just downstream of the housing development
C)A sample of water collected just downstream of the northern forest
D)A sample of distilled water
Answer:
D. A sample of distilled water
Explanation:
You need to have a control sample that hasn't been messed with to see what would happen if you had no reaction to your experiment
A sample is the smaller set of data which a researcher makes use of to complete a research.
As a result of this, we can see that a sample study is the use of these samples to come to a conclusion about the investigation or research which is going on.
Some examples of a sample study include:
Simple random sampling. Systematic sampling. Stratified sampling, etcPlease note that your question is incomplete so i gave you a general overview which would help you get a better understanding of the topic.
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Which of the following is NOT found in tRNA?
Group of answer choices
Adenine
Cytosine
Thymine
Uracil
Answer:
uracil
Explanation:
2 Grant wants to find the odor of a
substance. Which of his senses will
he use to find the odor of the
substance?
A sight
B touch
C smell
D hearing
A botanist crosses two pink-flowered plants. The cross involves alleles that were not clearly dominant or recessive and could make red, pink, and white-flowered plants. If four plants are produced from the cross, what is the expected number of white-flowered plants?
Answer:
1
Explanation:
According to the information in this question, a gene coding for flower color in a plant is involved. The allele for red color (R) is incompletely dominant over the allele for white color (r) to form an intermediate phenotype/color i.e. Pink that is heterozygous (Rr) for the gene.
If two pink plants are crossed i.e. Rr × Rr, each parent will produce R and r gametes. Using these gametes in a punnet square (see attached image), the following offsprings will result: RR, Rr, Rr, and rr.
Out of these four offsprings;
1 RR is red : 2 Rr is pink: 1 rr is white
Hence, If four plants are produced from this cross, according to this question, the expected number of white-flowered plants will be 1 out of 4.
The pedigree chart below shows the Jones family. The mother is purebred dominant for the widow's peak trait. The father is purebred recessive for a straight hairline.
Explanation:
All of the children will have the widows peak but will. carry the gene for a straight line
two difference between drone bee and worker bee
Answer:
The worker bees are female, but they do not breed. The queen bee is female and creates all the babies for the hive. The drone bees are male and do not have a sting. Bees communicate with each other about food sources using dances.
Explanation:
please please help me with this one
What type of cell division is occurring in the
diagram to the left?
A. Mitosis I and Mitosis Il
B. Meiosis I and Meiosis Il
C. Synthesis
D. Mitosis I and Meiosis Il
Identify the different types of energy below
Answer:
B
Explanation:
Fan is a conduction method of energy
The heat from the coffee conventions through to the spoon and the cup and the sun is radiation heat
Explain the difference between an invasive species and a nonnative species.
Answer:
Non-native species spread by natural process or human activities. Most non-native or indigenous species are harmless. They are called exotic species. ... The main difference between exotic and invasive species is that exotic species is harmless to the ecosystem whereas invasive species is harmful to the ecosystem.
Explanation:
Answer and Explanation:
Invasive is a species of plant or animal that outcompetes other species causing damage to an ecosystem..
Non-native: a species that originated somewhere other than its current location and has been introduced to the area where it now lives..
Non-native species are also called exotic species..
link between the struction and function of water molecule
Predict how a drug that interferes with the production of a cyclin (either by preventing its accumulation or by allowing it to over accumulate) may affect the cell cycle.
How would a large increase in the salinity of an estuary most likely affect
the ecosystem of the estuary?
Answer:
Salinity also affects chemical conditions within the estuary, particularly levels of dissolved oxygen in the water. The amount of oxygen that can dissolve in water, or solubility, decreases as salinity increases
Explanation:
What conditions make for a violent volcanic eruption?
OA. Magma with low gas content
OB. Magma with low viscosity
OC. Magma with high silica content
OD. Magma that can flow easily
Answer: B
Explanation:
Magma with low viscosity
Magma that has high content of silica will lead to a violent volcanic eruption. Thus, the correct answer is option C.
What kind of magma results in violent volcanic eruption?Magma that has a high content of silica will have high viscosity. This is due to the bond formation between silicon and oxygen, forming a Si-O tetrahedron.
These tetrahedra combine with each other and result in polymerization which increases the resistance of the liquid to flow. This type of thick magma does not flow easily and will result in an explosive eruption.
High amount of silica causes a lot of gas to be trapped in the volcano. High-viscosity magma does not allow for the exsolution of gas bubbles.
Thus, the gas bubbles will be trapped inside and increase pressure on the magma column to explode. The trapped gas thus provides the driving force for the explosion.
Thus, the correct answer is option C.
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The diagram models the collision of India with the Eurasian plate. Way crustal feature began forming 10 million years ago when India collided with the Eurasian plates?
Answer:a mountain range
Explanation: because when when they crashed it created a mountain range
Answer:
B
when they crashed it created a mountain range
4. Describe your results.
I
Infer If the rock layers shown above hare
not been disturbed, what type of dating
method would help you determine which
layer is oldest? Explain.
Answer:
radiometric dating methods
Explanation:
The oldest rock layer will be at the very bottom, and as time goes on, more layers will form making the top layer the youngest layer and the bottom layer the oldest. This method can determine the amount of radioactive decay of certain elements which can help them make a geologic time scale.
Climate change has been linked to a decrease in *
A: temperature of Earth
B: the rate of carbon dioxide production
C: the rate of species extinction
D: the size of the polar ice caps
Answer:
a
Explanation:
In pea plants, the allele for tallness is dominant. What are the possible genotypes of a tall pea plant?
TT or Tt
TT only
Tt or tt
TT or tt
Answer:
Tt and Tt
Explanation:
Edmentum (Hope this helps someone in the future even if it won't help the question asker!)
WARM-UP
Look at the two skulls on the right. Use the drop-
down menus below to decide whether certain
components of the human and chimpanzee skull
are similar or different.
Overall skull shape:
Teeth:
Nose shape:
Parts of jaw:
Skull size:
Answer:
overall skull shape- similar
nose shape- different
teeth- different
parts of jaw- similar
skull size- similar
Explanation:
correct on edge:)
The correct match of the components of the human and chimpanzee skull is:
overall skull shape- similarnose shape- differentteeth- differentparts of jaw- similarskull size- similarWhat is the difference between the skull of humans and chimpanzees?Chimp skulls have prominent brow ridges that extend considerably in front of the cranium. In contrast, the human skull's forehead rises immediately from the brows. A prominent nasal bone in the human skull between the eyes contrasts sharply with the flat curvature that leads to the chimp nasal hole.
In comparison to human cranial anatomy, apes have a more projecting face, a larger brow ridge, a longer face, and larger teeth in the front than in the back.
Therefore, the correct match is
overall skull shape- similarnose shape- differentteeth- differentparts of jaw- similarskull size- similarTo learn more about skulls, refer to the link:
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A runner has started a 3-mile race. She wants to run the mile in 24 minutes. When she gets to the 2.2-mile mark she begins to get greatly fatigued and her muscles start burning. What is happening in her body that causes this?
A)There is a virus in her that is infecting her muscle cells.
B)She has started to run out of ATP energy so the muscles are trying to make some creating lactic acid that causes the burn.
C)She did not stretch properly so the muscles are tightening up and burning because of it.
D)She should have had more water before the race so that she was well hydrated.
Answer:
b i think
Explanation:
(b)
The image below shows part of the surface of a leaf.
0.1 mm x 0.1 mm
The length and width of this piece of leaf surface are both 0.1 mm
Calculate the number of stomata per mm of this leaf surface.
Explanation:
You didn't attach a picture so i'll just explain how to find the number of stomatas/mm^2.
first you find the surface by multiplying the length by the width
0.1*0.1=0.01mm^2
now you count the numer of stomatas in the picture
in0.01mm^2 you have.........................x stomatas
in 1mm you have ...............................y stomatas
y=100x
Which describes chemical digestion? *
Which verb correctly completes this sentence
The cabins are empty ___ to be renovated.
A. has
B. is
C. have
D. can
E. was
Answer:
has ?
Explanation:
Answer: The answer is A (has)
Explanation:
Which best describes the relationship between digestion and cellular respiration? O A. Digestion breaks foods down to simple sugar molecules, and respiration uses the sugar molecules to produce energy. O B. Digestion creates nutrients from food particles, and respiration uses the nutrients to produce energy. O C. Digestion releases oxygen molecules from food, and respiration uses oxygen molecules to produce energy. D. Digestion produces waste materials, and respiration uses the waste materials to produce energy.
Answer:
Cellular respiration is a set of metabolic reactions and processes that take place in the cells of organisms to convert biochemical energy from nutrients into adenosine triphosphate (ATP), and then release waste products
Which organelle, found only in plant cells, has the function of storing starch?
Answer:
Explanation:
Plant Plastids are the only organelle Plant cells have that store starch
How much space is there between particles of frozen water?
Explanation:
When water turns to ice, it expands/contracts
The (molecules) in water is more tightly packed than in ice, so water has greater density than ice. Don't let the fact that ice is a solid fool you!
5. Why do thorns and spines exist? *
O To stop animals from eating plants
To stop insects from pollinating
To stop people from looking at plants
O To help plants stay standing upright and give them their shape
Answer:
to stop animals from eating plants
Explanation:
the thorns and spines help protect the plant for example if we touch the plant it hurts same goes with animals
Answer:
A. To stop animals from eating plants
Which statement is an example of how structure relates to function?
An allele for purple flowers is dominant and an allele for white flowers is recessive
Mitochondria have a highly folded membrane which increases the amount of ATP that can be made.
DNA transcribes into RNA, and RNA translates into proteins.
Heredity is the passing of genetic information from parent to offspring.
Answer:
Mitochondria have a highly folded membrane which increases the amount of ATP that can be made.
Multicellular organisms contain organ systems. Which of the following BEST describes the organs in an organ system?
о A. The organs in an organ system are made up of similar cells.
O
B. The organs in an organ system are made up of similar tissues.
C. The organs in an organ system work together to perform a specific function.
O
D. The organs in an organ system work together to perform all the functions a multicellular organism needs to maintain homeostasis.
Answer:
C. The organs in an organ system work together to perform a specific function.
Explanation:
The definition of an organ system is a "group of organs that work together as a biological system to perform one or more functions". Each organ in a system does a different job in order to achieve the same goal. For example, the stomach breaks down food, and the intestines gather nutrients but the goal of both is to digest food.