Explanation:
Radioactive dating works on the principle that a radioactive isotope can decay into the stable daughter nuclei at a constant rate. Geologist generally use the principle for half life. Half life is the time required for half of the radioactive substance to decay. This is constant for a particular element.
An individual observation can become a scientific theory.
False
True
Answer:
the answer is false: A scientific theory is a hypothesis that has been extensively tested, evaluated by the scientific community, and is strongly supported. Theories often describe a large set of observations, and provide a cohesive explanation for those observations. An individual cannot come up with a theory.
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Explanation:
Answer:
false
Explanation:
Which of the following are steps for balancing chemical equations? Check all that apply. A. Subtract the total amount of elements from the products. B. Add all the elements together. O c. Write the chemical equation using formulas and symbols. D. Count the atoms in each substance in the reactants and products.
Answer:
c d
Explanation:
Are your two DNA strands similar? How do?
what is not a principle of the cell theory
The cell theory consists of:
1. all living organisms are made up of cells
2. cells are the basic structural/organizational unit of all organisms
3. all cells come from pre-existing cells
Invasive species can travel across oceans on ships.
A.) True
B.) False
Answer:
A. True
yes, Invasive species can travel across oceans on ships.
what inhibits the synthesis of viral proteins help block viral replication
Answer:
antibiotics
Explanation:
Only some antibiotics will stop protein synthesis.
Answer:
The activated kinase phosphorylates elongation eIF-2 to its inactive form. These events lead to the inhibition of protein synthesis that stops the replication of viruses.
Explanation:
1
In order to keep up with the food demands of an increasing human population, farmers use fertilizers and other agricultural
technologies to grow and harvest more food. How do fertilizers negatively impact
the environment?
OA. The rate of nutrient depletion increases in soil that has been fertilized.
OB. Run-off from fertilized land increases nitrogen levels in ecosystems and encourages algal growth.
OC. Fertilizers are difficult to apply and require heavy machinery which damage land.
OD. Fertilizers allow crops to grow bigger and faster, so they can feed more people.
Answer:
OB. Run-off from fertilized land increases nitrogen levels in ecosystems and encourages algal growth. is the correct answer.
Explanation:
because This in turn is leading to global warming and weather changes.
A. The rate of nutrient depletion increases in soil that has been fertilized.
It increases nitrogen for better yield, but it affects the nitrogen cycle.
The expression of both alleles for flower color produces a new pink. this illustrates incomplete dominance. Which of the following would be correct phenotype ratio from a cross between two heterozygous pink flowers
Answer:
C is the answer
HURRYYYY PLEASE HELP ME I NEED IT RIGHT NOW!
Define groundwater and explain how it relates to the terms water table, aquifer, and confined aquifer.
Explanation:
Groundwater is water that occupies the zone of saturation within the ground. The water table is the upper limit of the groundwater. An aquifer is a body of porous rock or sediment saturated with groundwater. Groundwater enters an aquifer as precipitation seeps through the soil. It can move through the aquifer and resurface through springs and wells. Groundwater separated from atmospheric pressure by relatively impermeable material is termed confined groundwater. When such zones are penetrated by wells, the water rises above the point at which it was first found because a confined aquifer is under pressure exceeding that of atmospheric pressure.
Endo and exocytosis:
A. Passive transport with the concentration gradient, requiring no energy.
B. Active transport of large molecules with the concentration gradient, thus requiring no energy.
C. Active transport of large molecules in and out of the cell. Requires energy.
Answer:
C. Active transport of large molecules in and out of the cell. Requires energy.
Explanation:
endo- the formal definition is “endometrial glands and stroma existing outside the endometrial cavity”. Essentially, it is tissue that resembles the endometrium (lining of the uterus), that exists other places. Most often, it is found in the pelvic peritoneum, or the lining of our abdominal cavity.
Exocytosis describes the process of vesicles fusing with the plasma membrane and releasing their contents to the outside of the cell. Both endocytosis and exocytosis are active transport processes.
Answer:
C. Active transport of large molecules in and out of the cell. Requires energy.
Explanation:
Endocytosis and exocytosis is an active transport of large molecules in and out of the cell, which requires energy.
What is the cause of this eustatic sea level change?
Answer:
eustatic sea level are large scale events: tectonic activity shrinking or growing the area of world oceans, a rise in temperatures causing thermal expansion of water, or large ice sheets melting and adding water to the oceans are the three most common.
Explanation:
Hope I helped!!
Firefly luciferase is the light-emitting enzyme responsible for the bioluminescence of fireflies and some types of beetles. This process occurs in specialized light-emitting organs, usually on a firefly's lower abdomen. The enzyme catalyses the firefly chemical luciferin, by binding to it and spending up the chemical reaction that combines oxygen molecules to produce oxyluciferin. Besides, oxygen this requires ATP. Because of the requirement of ATP, firefly luciferases have been used extensively in biotechnology. How do the enzymes speed up the chemical reactions and produce bioluminescent light?
Answer:
Luciferase transforms luciferin into oxyluciferin while consuming ATP and O₂, and causes the emission of light.
luciferin + ATP + luciferase + O₂ → oxyluciferin + AMP + CO₂+ luciferase + light
Explanation:
Fireflies are organisms that emit cold light by the process of bioluminescence. It is a chemical reaction of male individuals to attract the females that also respond by emitting light.
Luciferin is the molecule responsible for light emission. The chemical reaction involves the luciferin molecule, ATP molecule, enzyme luciferase, and oxygen molecule. Luciferin, the responsible molecule for light emission, is transformed into oxyluciferin by the enzyme luciferase. The enzyme consumes oxygen and ATP, which is the principal source of energy in living beings. Finally, a light of about 560 nm is released.
luciferin + ATP + luciferase + O₂ → oxyluciferin + AMP + CO₂+ luciferase + light
Almost the entire amount of energy involved in the reaction turns into luminous energy. ATP used for this light production process comes from the photosite´s mitochondrial electronic chain, responsible for the organism´s energy production.
Photosites are the cells responsible for light production, and many of their mitochondria are placed near the plasmatic membrane to catch oxygen.
Oxygen gets in the organisms through the lantern trachea. During the respiration process, photosites consume oxygen. Mitochondria placed in the cell periphery near the cell membrane catch the oxygen molecules and produce ATP. ATP produced by oxidative phosphorylation is involved in the production of oxyluciferin, turning into AMP.
Posteriorly, the oxyluciferin molecule is recycled back to luciferin. This process shows how chemical energy turns into luminous energy.
what is the relationship between man and the earth
Explanation:
The earth was created to assist us in our progression toward Eternal Life. The earth provides plants and animals for our food. Man is to rule over the earth by tilling, protecting, and preserving it. In other words, man is to be a steward over the earth.
Provide a detailed description between how the circulatory and respiratory systems work together.
Answer:
How they work together!
Explanation:
They both work together to circulate oxygen and blood throughout the body. Oxygen and blood are brought to the organs and tissues throughout the body via the arteries. They also bring nutrients to the cells.
'Complete the diagram to show the results you would see at 40°C and 60°C'
Answeryeah it’s that one
Explanation: yup, definitely that one.
______ farming, or production for cash, usually take place on large holdings.
What is the amino acid sequence of the following mutation
ATT-GAG-CAG-TCA-AAA-TCC-G
Answer:
Yeah the answer is TAA-CTC-GTC-AGT-TTT-AGG-C
Explanation:
Had a question similar to this.
A roan cow is crossed with a red cow. What percent of the offspring will be roan?
Answer:
Red cows have a dominant red allele and white cows have a dominant white allele. When a red cow mates with a white bull, they can have offspring that have the color that is called Roan which is a red and white spotted appearance. This is an example of co-dominance
Explanation:
CORRECT ME IF I AM WRONG
If a roan cow is crossed with a red cow, the percentage of roan cow in the offspring will be 50%.
CO-DOMINANCE:A roan cow phenotype is a product of co-dominance between red (R) and white (W) alleles. This means that a roan cow will have a RW genotype. If a roan cow is crossed with a red cow i.e. RW × RR, the gametes produced by each cow is as follows:RW - R and WRR - R and RUsing a punnet square, the following offsprings of cow will be produced: 2RR, and 2RW. This means that the percentage of roan cows in the offspring will be 50% i.e. ½ × 100 = 50%.Therefore, If a roan cow is crossed with a red cow, the percentage of roan cow in the offspring will be 50%.
Learn more about co-dominance at: https://brainly.com/question/9881046
Energy from the sun, water, air, wood, and soil are all examples of what kind of energy?
ecological energy
organic energy
renewable energy
solar energy
Answer:
Renewable energy
Explanation:
All of these energy sources are ecologically renewable, and therefore are classified as renewable recources that provide renewable energy.
you are desighing a new product that requires the use of stable honreactive gas which gas would be most suit able
Answer:
Noble Gases
Explanation:
Noble gases are the most stable due to having the maximum number of valence electrons their outer shell can hold.
Gases such as Helium, Neon, Krypton and Xenon.
Answer:
Noble gases or Neon
Explanation:
Just did the test
How does the carbon in grass become part of a lion?
Wind energy is a sustainable and renewable alternative to burning fossil fuels, with a much smaller impact on the environment.
What are some advantages of using wind as a source of energy?
Answer:
becsuse it rejects pollunation of air and environment
change to passive voice:the police caught the boy red handed
situation 2: Throwing of garbage
Mat wants to throw his garbage inside the trash bin. Help him shoot his garbage right at the trash can by illustrating the trajectory. Explain below how you ended up with that trajectory.
#pa answer po (◠‿◕)
I wanna throw my garbage too
ANSWER ASAP LOOK AT THE PICTURE BELOW
CORRECT ANSWER = BRAINLIEST!
LINKS OR FILES = REPORT
Answer:
A
Explanation:
The graph shows the growth and reproduction in 4 different cells, A, B, C, and D, over time. Use the graph to answer questions below.
Answer: A.
Explanation:
Cells generally have a relatively short lifestyle in that they grow, divide and then die off. This is not the case with cancerous cells as those ones mutate and then multiply such that they eventually form a tumor.
Looking at the graph, most of the cells are remaining at a lower or manageable number because they are dying off. Cell A on the other hand is simply increasing in number which means that it is a cancerous cell as it is increasing its number by mutating instead of dying off like other cells would.
Question 4 of 16 Which chemical equation models a synthesis reaction ? O A. 2Na+MgCl 2 2NaCl+Mg O B. H 2 O+CO 2 H 2 CO 3 C. HCl+LiOH LiCl+H 2 O O CO 2 C+O 2
Answer:
The chemical equation which is a model of synthesis reaction is option B
B. H₂O + CO₂ ---> H₂CO₃
Explanation:
A synthesis reaction is a type of chemical reaction in which two or more reactants combine to form a single product.
A synthesis reaction is illustrated below:
A + B ----> C
In the illustration above, A and B are two chemical substances which serve as the reactants in the chemical reaction. A and B combine with each other to form a product C.
Common synthesis reaction include:
1. The reaction of sodium with chlorine to produce sodium chloride: Na + Cl ---> NaCl
2. The synthesis of Nitrogen (iv) oxide from nitrogen (ii) oxide and oxygen: 2NO + O₂ ---> 2NO₂
3. The synthesis of sulfur trioxide from sulfur dioxide and oxygen: 2SO₂ + O₂ ----> 2SO₃
From the given chemical reactions, the model of a synthesis reaction is option B
H₂O + CO₂ ---> H₂CO₃
In holly trees, red fruit (R) are dominant to white fruit (c), and spiny leaves (L) are dominant to smooth leaves (1).
Complete the Punnett square to figure out how many of the new holly tress from this cross would be expected
to have white fruit and smooth leaves.
complete the dihybrid punnet square to figure out how many of the new holly trees from this cross would be expected to have white fruit and smooth leaves?
A- 3
B- 9
C- 2
D- 1
Answer:
The answer is D: 1
Punnet squares are FUN
what is chemical reaction?
Answer:
a process that involves rearrangement of the molecular or ionic structure of a substance, as distinct from a change in physical form or a nuclear reaction.
Explanation:
What characteristics of the molecules being transported determines how they will cross the membrane?
A. Size and mass
B. Passive or active
C. Polarity and size
D. Charge and structure
Answer:
C. Polarity and size
Explanation:
Three primary factors determine whether a molecule will diffuse across a cell membrane: concentration, charge and size.
Answer:
C. Polarity and size
Explanation:
The polarity and size of the molecules being transported determines, how they will cross the membrane.