Answer:
DNA is a long molecule, made up of two strands twisted together to make a spiral known as a double helix.
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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 now that you know the bacteria in each tank drag the tanks to put them in the correct order
Answer:
1st ammonia nitrifying
2nd nitrite nitrifying
3rd denitrifying
Explanation:
(d) State the importance of mitosis in the growth of a multicellular organism, such
as a
flowering plant or a mammal.
Explanation:
Like other multicellular organisms, plants grow through a combination of cell growth and cell division. Cell growth increases cell size, while cell division (mitosis) increases the number of cells. As plant cells grow, they also become specialized into different cell types through cellular differentiation.
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Which type of feather gives the bird its color?
down
barb
contour
flight
it contour
I hope it work
Contour type of feather gives the bird its color. Therefore, the correct option is C.
The outer feathers that give a bird its color and general appearance are known as contour feathers. The barbs on the branches that make up the central shaft of these feathers join to form a strong, streamlined structure. The barbs have their own little branches, known as barbules, which contain pigments that help give the bird its color.
The diverse colors and patterns seen on many bird species are determined by the arrangement and color of pigments in the barbules of contour feathers. Therefore, contour feathers are important in determining a bird's color.
Therefore, the correct option is C.
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When assessing claims what is validity?
Answer:
Validity refers to the degree to which a method assesses what it claims or intends to assess.
Explanation:
4. Mangrove seeds are different from most seed because they____
Answer:
tdyrdrfiygogiuhuy
Explanation:
gogoygoygiu
how can scientists use fossil records from locations around the world to determine geologic timescale
Answer:
I dont know this i will next year im just in 8th grade
Explanation:
What is this a picture of
chromatin
sister chromatids
homologous pair
single strand of DNA
Explanation:
sister chromatids
What does atomic number tell you about an atom? * Number of electrons in the nucleus Number of protons and neutrons in the nucleus Number of protons in the nucleus Number of electrons in the electron cloud around the nucleus *NEED ANSWER QUICKLY*
Answer:
Number of protons in the nucleus
Answer:
Number of protons in the nucleus
Explanation:
How does a crater formed by the impact of a meteorite differ from a crater formed by volcanism?
Answer: Whereas volcanic craters arise from deep inside the planet, impact craters originate in outer space.
Explanation:
Soil formation is most influenced by. wind speed
air pressure
cloud cover
Rain fall
What was the name of the supercontinent 2million years ago?
In the laboratory, yeast cells are usually grown at a temperature of 25oC. A scientist wanted to determine if yeast cells would reproduce faster or slower when the temperature was dropped to 15oC. The same number of yeast cells were placed in the same medium with the same amount of nutrients. One sample was kept at 25oC and the other one was kept at 15oC. The number of yeast cells was counted every hour for an eighteen hour period.
Answer:
This question is incomplete, however, it is asking to identify the following variables:
Independent variable: Temperature
Dependent variable: Number of yeast cells
Constants: same amount of nutrients, same number of yeast cells, same medium
Explanation:
- Independent variable is the variable that the experimenter changes or manipulates in order to bring about a measurable effect. In this experiment, the TEMPERATURE at which the yeast are kept is the independent variable.
- Dependent variable is the variable that responds to the changes made to the independent variable. It is the variable that is measured by the experimenter in the experiment. In this case, The NUMBER OF YEAST CELLS was counted, hence, it is the dependent variable.
- Constants are variables that are kept unchanged or same for all groups by the experimenter in order not to influence the experiment's outcome. In this case, the CONSTANTS are: same amount of nutrients, same number of yeast cells, same medium etc.
As a frog develops from a tadpole into an adult frog, it goes through changes that are signaled by hormones within the body. Which best describes the role hormones play in changing a tadpole to a frog?
Answer: In amphibians, metamorphosis is generally associated with the changes that prepare an aquatic organism for a primarily terrestrial existence In (frogs and toads), the metamorphic changes are more dramatic, and almost every organ is subject to modification Regressive changes include the loss of the tadpole's teeth and internal gills, as well as the destruction of the tail. At the same time, constructive processes such as limb development are also evident. The means of locomotion changes as the paddle tail recedes while the hind limbs and forelimbs develop. The tadpole's cartilaginous skull is replaced by the predominantly bony skull of the frog. The teeth used for tearing pond plants disappear as the mouth and jaw take a new shape, and the tongue muscle develops. Meanwhile, the large intestine characteristic of herbivores shortens to suit the more carnivorous diet of the adult frog. The gills regress, and the gill arches degenerate. The lungs enlarge, and muscles and cartilage develop for pumping air in and out of the lungs. The sensory apparatus changes, too, as the lateral line system of the tadpole degenerates, and the eye and ear undergo further differentiation The middle ear develops, as does the tympanic membrane characteristic of frog and toad outer ears. In the eye, both ingratiating membranes and eyelids emerge.
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Choose THREE human activities that have a negative impact on the
biodiversity within Amazon rainforests.
A
captive breeding of organisms
B
change in the land-use pattern
С
exploitation of available resources
D
Introduction of conservative measures
E
introduction of invasive species
restoration of degraded land
Answer:
The 3 would be the following:
A
captive breeding of organisms
E
introduction of invasive species
restoration of degraded land
A cell must expend energy to accomplish substances movement during A osmosis B active transport C passive transport D diffusion E filtration
How might volcanic eruptions change the flow of energy on earth?
Answer:
It causes global warming due to emission of carbondioxide gas.
Explanation:
Volcanic eruptions change the flow of energy on earth by emitting gases such as carbondioxide and sulfur dioxide gases. Volcanic gases like sulfur dioxide is responsible for global cooling by reflecting solar radiation back to the space, while on the other hand, carbon dioxide emitted from volcanoes, has the ability to promote global warming by blocking solar radiation. If the amount of carbondioxide gas is higher as compared to sulfur dioxide gas so global warming occurs.
Figure 1 shows a seaside cliff. Figure 2 shows the same cliff after a period of time has passed. What caused the change from figure 1 to figure 2? A. rainfall only B. ocean waves only C. wind D. rainfall and ocean waves
Answer:
I think its A. because i have this test and its not B
i hope this is helping you!!!!!
Explanation:
HELP ITS DUE RIGHT NOW PLEASE !!!
definition of biotechnology
Answer:
definition
Explanation:
the exploitation of biological processes for industrial and other purposes, especially the genetic manipulation of microorganisms for the production of antibiotics, hormones, etc.
Which is not a characteristic of a Prokaryote?
A) Simple
B) Has a nucleus
C) Replicates via cloning
D) Always single cell
Answer:A
Explanation:
Question 2 of 10
Which of the following countries produces the most greenhouse gases?
A. Egypt
B. Greenland
C. France
D. United States
Answer:
The answer is D. United States
Explanation:
Replicate the following DNA sequence: TCT *
Replicate the following DNA sequence: GGG *
Replicate the following DNA sequence: GGA*
Voir
Hint:
A goes with T
T goes with A
C with G
G with C
Mountains, volcanoes, and earthquakes may occur when one plate-
A pushes apart
B erodes
C breaks open
D pushes against another plate
Answer: d
Explanation:
D trust me
The product of an object's mass, how high it is, and the acceleration of gravity of the planet it's on define which term
A. Potential Energy
B. Work
C. Power
D. Kinetic Energy
Answer: kinetic energy
Explanation:
if a blue eyed offspring is formed from black eyes parents, what type of character is the blue eye dominant or recessive? expalin with the help of a chart
Answer:
Blue Eyes Are: Recessive
Explanation:
The brown eye form of the eye colour gene (or allele) is dominant, whereas the blue eye allele is recessive. If both parents have brown eyes yet carry the allele for blue eyes, a quarter of the children will have blue eyes, and three quarters will have brown eyes. I hope this helps :) Good luck on your assignment!!!
Name Cu2(SO4)3 (transition metal).
Answer:
Cooper sulphate
Explanation:
I think soooo
On Friday, you play Xbox Kinect Dance Central 2 through the night. The next morning you try cutting the grass but your arms, legs, and back ache. You are “in a fog” and forget to add gas to the lawn mower, your vision is blurry, and you are somewhat irritable. What happens in your body to recover from sleep deprivation?
Answer:
During sleep your body heals itself and restores its chemical balance. Your brain forges new thought connections and helps memory retention.
Explanation:
hope dis helps
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
3. Which enzyme do scientists use to cut genes out of strands of DNA?
DNA polymerase
DNA ligase
restriction endonuclease
RNA polymerase
Answer:
Restriction Endonuclease.