We use different radioactive isotopes to determine timescale because decay within the rocks according to their half-life rates, and by selecting the appropriate minerals and measuring the relative amounts of parent and daughter isotopes in them, the date at which the rock crystallized can be determined.
Brainliest to whoever helps :)
Mutualistic fungi can be best exemplified by which of the following
A) athletes foot fungus absorbing nutrients from cell
B) bread mold reproducing to cover a slice of bread
C) fungi and plant roots cooperating to meet their needs
D) mushroom fruiting bodies sprouting from tree roots
Answer:
C) fungi and plant roots cooperating to meet their needs
Explanation:
This is the correct answer. A mutualistic relationship requires both organisms to benefit from the relationship, every answer except C involves only one organism receiving benefit. C properly demonstrates a mutual relationship where they both benefit.
Help plisssss:((((((((
Answer:
DNA and amino acids
Explanation:
Fats and amino acids don't require nitrogen
A student found the following flowchart in a textbook.
Glycolysis
Krebs cycle
Electron transport chain
Which statement is the best summary of the process shown?
A. Solar energy is converted and stored in chemical bonds.
B. Chemical energy is converted to kinetic energy
C. Energy from sunlight moves through trophic levels.
D. Energy in food is released and stored in ATP molecules.
I
Answer:
D. Energy in food is released and stored in ATP molecules
Explanation:
The flow chart in this question, which is as follows, is describing the process of cellular respiration.
Glycolysis → Krebs cycle → Electron transport chain
Cellular respiration is the metabolic process by which chemicals in food molecules (glucose) is broken down to release energy usable by the cells called ATP. It involves the three stages as depicted by the flowchart above.
Therefore, according to the question, the process described is a summary of how "Energy in food is released and stored in ATP molecules".
Help fast! The diagram shows the process of making recombinant DNA and using it to transform a bacterial cell. The recombinant DNA is made by inserting a human gene into a bacterial plasmid. Note that the plasmid contains several genes for antibiotic resistance, including ampr, tetr, and ori.
Which is the most likely purpose of the transgenic bacteria that are engineered by this process?
A.) developing new drugs to fight antibiotic-resistant bacteria
B.) removing traits of antibiotic resistance from bacteria populations
C.) using bacteria to produce large quantities of a human protein, such as growth hormone
D.) developing bacteria for use in gene therapy
Answer:
D.
Explanation:
A model showing two possible arrangements of chromosomes during meiosis is shown in Figure 1.Figure 1. Two possible arrangements of chromosomes during meiosis
Which of the following questions about genetic diversity could most appropriately be answered by an analysis of the model in Figure 1?
A) Does crossing-over generate more genetic diversity than the fusion of gametes does?
B) Does DNA methylation prevent independent assortment during metaphase II?
C) How does the independent assortment of the two sets of homologous chromosomes increase genetic diversity?
D) Do daughter cells that are not genetically identical to parent cells produce viable zygotes?
C) How does the independent assortment of the two sets of homologous chromosomes increase genetic diversity?
What is independent assortment?Independent assortment is a mechanism that contributes to genetic diversity during meiosis. It refers to the random alignment and separation of homologous chromosomes during the first meiotic division (meiosis I), which leads to different combinations of chromosomes being passed on to the daughter cells.
This means that each daughter cell will have a unique combination of chromosomes. When the gametes (sperm or egg cells) produced by meiosis fuse during fertilization, they can give rise to offspring with a unique combination of genetic information, further increasing genetic diversity within a population.
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The circled portion of DNA labeled X in the following picture is a
a phosphate group
b sugar
c nucleotide
d aldehyde base
Answer:
a. Phosphate group
Explanation:
The circled portion of the DNA labeled X is ; ( C ) Nucleotide
The Nucleotide in a DNA molecule is the building block of the nucleic acid and it consists of a sugar molecule, A phosphate group ( P ) and nitrogenous base like adenine, cytosine or guanine.
The circled portion covers a nitrogenous base ( cytosine ), a phosphate group and a sugar molecule therefore the circled portion correctly represents a Nucleotide in a DNA molecule.
Hence we can conclude that the circled portion of the DNA is Nucleotide.
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bacteria that have had a human gene for insulin inserted in them are used to manufacture.the drug of diabetics
The top two human activities that threaten the habitats of endangered species globally are:
a.) Over-exploitation and agriculture
b.) Urban development and invasion of non-native species
c.) System modification and war
d.) Pollution and climate change
Answer: D
Explanation:
A person'a blood type depends on the type of protein market, called an ___, found on the cell membranes of the red blood cells.
Select all of the following genotype that is/are a heterozygous genotype
A( AA
B( Aa
C( aa
D(Zz
E( zz
Answer:
B, D
Explanation:
I’ll mark brainliest
15 points
Can someone explain why this is true?
If the kinetic and potential energy in a system are equal, then the potential energy increases. What happens as a result?
Energy of motion decreases
Answer:
Total energy increases.
Explanation:
You're welcome.
Answer:
total energy increases
Explanation:
The atmosphere of the early Earth
A) had lots of oxygen
B)had almost no oxygen
C)was full of birds
D)had no carbon dioxide
Answer:
A
Explanation:
The atmosphere is almost like 20 percent oxygen so definitly A
spicy angryhe's watching Grey's
Answer:
Huh? Just huh. simply huh.
I’ll mark brainiest if your right need ASAP
Answer:
The second one, smooth shape is dominant and wrinkled is recessive
Explanation:
Answer:
The answer would be B
Explanation:
The wrinkly pea is recessive meaning it is less likely to pass on its traits.
what is soul erosion
Answer:
erosion is the action of surface processes that removes soil, rock, or dissolved material from one location on the Earth's crust, and then transports it to another location. Erosion is distinct from weathering which involves no movement.
Question 1
The seed of a plant is an important adaptation to life on land, because:
Answer: grows and produces oxygen to all living things bye idfk
Explanation:
Approximately 75% of the Earth's surface is covered in water. Why is water considered such a precious resource?
Answer:
Water is precious since it is one of the most basic commodities that sustain the life of human beings, animals and plant. Without water, it would be impossible for any form of life to exist in the universe. Close to 75% of the Earth is covered with salt water, while 2% of the surface contains frozen water.
Explanation:
Why is water a precious resource?
It is needed for all living things and must be managed well to ensure we have enough for our needs and to protect our environment. Water is a precious resource. We can't live without it. Clouds formed by this vapor ensure that water falls back down to Earth as rain, sleet, snow or hail.Water resources are sources of water that are useful or potentially useful to humans. It is important because it is needed for life to exist. Many uses of water include agricultural, industrial, household, recreational and environmental activities. Virtually all of these human uses require fresh water.Learn more:
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The diagram illustrates asexual reproduction. Which statement best describes the process?
plant breath through
Answer:
Plants respire through plant pores, called stomata. During respiration and photosynthesis, gases go in and out of the plants through stomata using diffusion, not breathing.
Answer:
respiration
Explanation:
Plants breathe through a process called respiration, where they exchange gases between the outside and the inside of their bodies as a living organism. They breathe through openings called stomata. Photosynthesis makes a plant produce oxygen, but a plant also requires oxygen constantly.
what is meaning of pneumonoultramicrosopilicovolcaconiouses
Answer:
a lung disease caused by breathing in very small pieces of ash or dust
Explanation:
11. Complete the cause, events, and effect graphic organizer to show the
relationships among the processes of convection currents, subduction,
and sea-floor spreading.
a.__________
in Earths mantle
b.__________
results in
The ocean is changed in c.__________
Answer:
A) Earths Mantle
Explanation:
Conventional currents in the Earth's mantle. B. sea-floor reading results in the ocean being changed in C. size and shape.
What are convection currents?A process that involves the transfer of energy from one location to another is a convection current. It is also known as heat transfer by convection.
Convection currents are fluid movements brought on by temperature or density variations within a substance. Because the particles within a solid are fixed in place, convection currents are only visible in gases and liquids. A straightforward illustration of convection currents is warm air rising toward a home's ceiling or attic.
Therefore, the correct option is
A. Conventional currents in the Earth's mantle.
B. sea-floor reading results in
C. The ocean is changed in C. size and shape.
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Question 5
Where do new adaptations come from? There is more than one correct answe
choose all that apply!!
New combinations of genes from the parents
Nature will give an organism the adaptations it needs to survive
An organism can choose to grow an adaptation
Mutations in the DNA passed on to an organism
Answer:
new adaptations come from:
New combinations of genes from parents.
Mutations in the DNA passed on to an organism.
Explanation:
Mutations in the DNA passed on to the organism and bring adaptations in the form of new characteristics. mutations may b lethal or fruitful and develop new characteristics in an organisms and increase its survival.
new combinations of genes from parents results from crossing over and recombination. these new genetic combinations bring adaptations.
Which of the following is NOT a step of cellular respiration?
a. glycolysis
C. electron transport chain
b. Krebs cycle
d all of the above are steps of cellular
respiration
Please select the best answer from the choices provided
The stages of cellular respiration include the following such as glycolysis,
electron transport chain and Krebs cycle.
Cellular respiration involves the various reactions done in cells of organisms
in order to ensure that chemical energy derived from food and other sources
are converted into ATP.
Cellular respiration involves processes such as glycolysis,
electron transport chain and Krebs cycle. Other processes however include
electron transport chain and phosphorylation.
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Explain why two siblings except identical twins have the exactly the same alleles
Answer:
having exactly the same DNA sequences, twins start accumulating genetic variation from the earliest stages of development, researchers at Iceland-based company deCODE genetics found, meaning that one twin harbors variants that aren't present in the other.
Which trait is controlled by three or more genes?
a) seed color in pea plants
b) feather color in roosters
c) fur color in palomino horses
d) hair color in humans
Answer:
it's uh yes
Explanation:
I just know because I am really bigbrain
PLEASE HELP ME FAST!
Of the many functions of the skeletal system, which is directly helpful to the circulatory system?
A. stores calcium and phosphorus
B. provides an attacment point for muscles
C. produces blood cells
D. provides shape and support for the body
E. protects internal organs
Answer:
c
Explanation:
Select the opposite strand to the following DNA sequence: ATG - CCC - CGA
1)AAG - CCC - GCT
2)GCT - GGG - CAT
3)TAC - GGG - GCT
Answer:
Option 3: TAC-GGG-GCT
Explanation:
Remember that A=T and C=G. Wherever there is an A, switch it with a T, and wherever there is a C, switch it with a G.
help pls :) i need a unique answer that isn’t plagiarism
I think thats because small animals have small body that can hide in a safe place. Like example if small animals hide go down to the earth, and the meteorite hit the earth, they will safe down to the ground.
Not like larger animals, they can only hide up he surface and when the meteorites came, they died.
Also some small animals such as cockroaches have ability to adapt to changes.
The sedimentary
rock gypsum is so
soft because it is
composed of clay
particles that
settled in slow-
moving water.
True or False
What molecule was theorized to give rise to many of the important bio molecules that we see 1 point
are important to life today?
A)protein
B)amonia
C)RNA
D)fats