Answer:
variation can be caused by mutation and other things
Explanation:
A mutation is a change that occurs in our DNA sequence, either due to mistakes when the DNA is copied or as the result of environmental factors such as UV light or cigerette smoke
➜ Following are the causes of variations:
Dual percentage: Offsprings inherit some features from mother and some from father. Hence no offspring will exactly resemble to either of the parent or each other.Mutation in gene or chromosomal pattern also causes variations.Which of the following is most likely to contribute to density-dependent regulation of populations? Group of answer choices Individuals voluntarily stop mating so that overcrowding does not occur. Density-independent factors lead to fewer births and increased mortality. The incoming energy decreases in populations experiencing a high rate of increase. Density-dependent factors lead to fewer births and increased mortality.
Answer:
Density-dependent factors lead to fewer births and increased mortality.
Explanation:
The carrying capacity can be defined as the maximum population size an environment can support. Density-dependent limiting factors produce a logistic growth pattern (S curve) in the population until it reaches its carrying capacity, thereby decreasing the birth rate and increasing the mortality rate in the population. Some important density-dependent limiting factors able to control the size of the population are competition (intraspecific competition), predation and diseases.
By favoring some alleles over others, natural selection can lead to survival advantages for some organisms. Which of the following is NOT an adaptation as a result of natural selection?
a
A certain snake species has many members of various colors.
b
A moth's wing markings help it blend into the forest habitat.
c
A bird that dives into water to hunt fish has webbed feet.
d
A bird has a certain beak size that allows it to eat seeds of various sizes.
Answer:
The Answer is A
Explanation:
Si se aplica a un muelle una fuerza de 30N provocamos que se alarguen 0.2m . Calcular la constante del resorte. Y que fuerza que habra que aplicarle para que se alargue 0.45m
Answer:
I. Constante de resorte, k = 150 Nm.
II. Fuerza = 67.5 Newton.
Explanation:
Dados los siguientes datos;
Fuerza, F = 30 N
Extensión, e = 0.2 m
Para encontrar la constante del resorte;
Fuerza = constante de resorte * extensión
F = ke
30 = k * 0.2
Constante de resorte, k = 30 / 0.2
Constante de resorte, k = 150 Nm
A continuación, para encontrar la fuerza para una extensión de 0,45 m;
Fuerza = 150 * 0.45
Fuerza = 67.5 Newton.
Which will cool down faster overnight, the water in the pool or the air above the pool? How do you know
Please help
Does anyone have the file for a biology lab. The lab is...
Lab: Blood Typing
Assignment: Lab Report
The name of the class is Biology B-IC
Answer:
are those the answer choice?
Explanation:
Which is the best example of a response to an external stimulus?
drinking water after a long run
avoiding the sun by looking for food at night
a hungry bear hunting for food
falling asleep in the treetops of a forest
Answer:
its a or b most likely a tho
Explanation:
Answer: B
Explanation:
List the three parts of the cell cycle.
Answer:
The cell cycle is a four-stage process in which the cell increases in size (gap 1, or G1, stage), copies its DNA (synthesis, or S, stage), prepares to divide (gap 2, or G2, stage), and divides (mitosis, or M, stage). The stages G1, S, and G2 make up interphase, which accounts for the span between cell divisions.
Explanation:
places where seeds are stored to help preserve biodiversity?
Answer:
Millions of these tiny brown specks, from more than 930,000 varieties of food crops, are stored in the Global Seed Vault on Spitsbergen, part of Norway's Svalbard archipelago. It is essentially a huge safety deposit box, holding the world's largest collection of agricultural biodiversity.
Explanation:
thanks me later
The bacterial DNA can be found in the
The bacterial DNA can be found in the cytoplasm.
Hope this helps
ill give brainly pls answer asap
Please HURRY I need the answer
Answer:
Answer is: D
Explanation:
answer all 3 please
Answer: 1. Earthquake
2. Lava
3. Divergent Boundary
Explanation:
NEED ASAP BIOLOGY 50 POINTS
Answer:
1. carbohydrates
2.nucleic acid
3.proteins
4.lipids
5.nucleic acid
6.proteins
7.lipids
8.carbohydrates
Explanation:
When plants with red flowers are crossed with plants with blue flowers, sometimes only red flowers are produced; other times either red or blue flowers are produced. Which gene is dominant?
Answer:
The colors you see in flowers come from the DNA of a plant. Genes in a plant's DNA direct cells to produce pigments of various colors. When a flower is red, for instance, it means that the cells in the petals have produced a pigment that absorbs all colors of light but red.
Explanation:
Dominant refers to the relationship between two versions of a gene. Individuals receive two versions of each gene, known as alleles, from each parent. If the alleles of a gene are different, one allele will be expressed; it is the dominant gene. The effect of the other allele, called recessive, is masked.
2. What was the instrumentation Franklin used to determine the structure of DNA?
Multiple choice question.
A)X-ray diffraction
B)spectroscopy
C)electron diffraction
D)chromatography
Answer:
D)chromatography
Explanation:
cause that you get the fingerprints
Two brown-eyed parents have produced three blue-eyed sons. What can be concluded about the parents?
Only the father carries an allele for blue eyes.
Only the mother carries a dominant allele for blue eyes.
The allele for blue eyes is on the father's Y chromosome.
They both carry a recessive allele for blue eyes.
Answer: C, I think
Explanation:
What are some negative impacts of having this life cycle that might have contributed to a decline in the dragonfly population?
Answer:
Dragonflies are important for our environment.
Explanation:
Dragon flies belongs to the ancient family of insects. They are found on every parts of the world and have been from around 300 millions years ago. There are more than 5000 different species of them found in different parts of the world. Conserving dragonflies is important as they considered as a valuable environmental indicators.
Dragon flies are found in the areas where water is available and near grasslands. Their life cycle is an example of an incomplete metamorphosis. The dragon flies lays their eggs near the water or in the water. Dragon flies spends most of the life time as a nymph in the water where they turn into an adult and leave the water. The dragon flies rely on the aquatic ecosystems all through their life. Thus dragonflies are an important indicators of the environment and water quality.
Most of the life cycle of the dragon flies depend on the availability of water and its quality. Polluting water and destroying their habitat will result in the decline of the population of the dragon flies.
Anyone know this? Not sure if my answer is right
Answer:
I'm sure you right.
C.) Photosynthesis.Explanation:
I checked the chemical equation as well as the diagram, and it looks accurate.
The chemical equation for photosynthesis is:
6CO2+6H2O → C6H12O6+6O2.
So your answer is correct.
In plants, photosynthesis is used to convert light energy from sunlight into chemical energy (glucose).
Carbon dioxide, water, and light are used to make glucose and oxygen.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Good luck foe.
Lb
Please help me and no file
Explain IN YOUR OWN WORDS why cancer drugs "turn a cancer's weakness against itself."
Answer:
There are several possible reasons for chemotherapy resistance: Some of the cells that are not killed by the chemotherapy mutate (change) and become resistant to the drug. Once they multiply, there may be more resistant cells than cells that are sensitive to the chemotherapy. Gene amplification.
HELP I AM IN A TEST! I WILL MARK AS BRAINLIEST IF CORRECT!
Which of the following statements is true?
Fusion reactions split hydrogen nuclei apart.
Fission reactions release more energy than fusion reactions.
Nuclear power plants change electricity into nuclear energy.
U-235 is an isotope of uranium.
Answer:
Fission occurs when a neutron slams into a larger atom, forcing it to excite and spilt into two smaller atoms—also known as fission products. Additional neutrons are also released that can initiate a chain reaction.
When each atom splits, a tremendous amount of energy is released.
Uranium and plutonium are most commonly used for fission reactions in nuclear power reactors because they are easy to initiate and control.
The energy released by fission in these reactors heats water into steam. The steam is used to spin a turbine to produce carbon-free electricity.
Explanation:none
Answer:
Nuclear power plants change electricity into nuclear energy.
Explanation:
Which of the following increases transpiration?
A air around the leaf with high humidity.
B air molecules around the leaf with kess kinetic energy.
C an obsence of light falling on the leaf.
D water molecules in the leaf with more kinetic energy.
Which neurotransmitters are used for each division of the autonomic nervous system? Be sure to describe the synapse at the autonomic ganglion and at the effector. What component of the system determines if a given neurotransmitter has an excitatory or inhibitory effect on the target effector?
Answer:
The autonomic nervous system is in charge of controlling visceral effectors. Traditionally, it is described by its peripheral nervous components (ganglia, nerves and plexuses) and two divisions are distinguished: the sympathetic and the parasympathetic. Transmission of the excitatory stimulus through the synaptic cleft occurs by release of neurotransmitters; the neurotransmitters of the sympathetic and parasympathetic nervous system are mainly norepinephrine (NA) and acetylcholine (AC). The NA-secreting fibers are called adrenergic and those that secrete AC, cholinergic. All preganglionic neurons, both those of the sympathetic nervous system and those of the parasympathetic nervous system, are cholinergic. The neuron that releases the neurotransmitter is called a presynaptic neuron. The signal receptor neuron is called a postsynaptic neuron. Depending on the type of neurotransmitter released, postsynaptic neurons are either stimulated (excited) or de-stimulated (inhibited).
Explanation:
The autonomic nervous system is the part of the central and peripheral nervous system that is responsible for the regulation of the involuntary functions of the organism, the maintenance of internal homeostasis and the adaptive responses to variations in the external and internal environment and two divisions are distinguished: the sympathetic and the parasympathetic. Acetylcholine is the preganglionic neurotransmitter of both divisions of the S.N.A. (sympathetic and parasympathetic) and also of the postganglionic neurons of the parasympathetic. The nerves at whose endings acetylcholine are released are called cholinergic. Norepinephrine is the neurotransmitter of postganglionic sympathetic neurons. The nerves into which norepinephrine is released are called adrenergic. Within the efferent sympathetic impulses, the postganglionic neurons that innervate the eccrine sweat glands and some blood vessels that supply the skeletal muscles are of the cholinergic type. Both acetylcholine and norepinephrine act on the different organs to produce the corresponding parasympathetic or sympathetic effects. The peripheral nerve endings of the sympathetic form a reticulum or plexus from which the terminal fibers come in contact with the effector cells. All the norepinephrine in peripheral tissues is found in the sympathetic endings in which it accumulates in subcellular particles analogous to the chromaffin granulations of the adrenal medulla. The release of norepinephrine at nerve endings occurs in response to action potentials that travel through nerve endings. The receptor, when stimulated by catecholamines, sets in motion a series of membrane changes that are followed by a cascade of intracellular phenomena that culminate in a measurable response. There are two classes of adrenergic receptors known as alpha and beta. These two classes are again subdivided into others that have different functions and that can be stimulated or blocked separately. Norepinephrine primarily excites alpha receptors and beta receptors to a small extent. The neurotransmitter acetylcholine is synthesized at the axonal terminal and deposited in synaptic vesicles. Acetylcholine activates two different types of receptors, called muscarinic and nicotinic receptors. Acetylcholine (AC) synthesis takes place at presynaptic termination by acetylation of choline with acetyl-coenzyme A, a reaction catalyzed by acetylcholinetransferase. The energy required for the release of a neurotransmitter is generated in the mitochondria of the presynaptic terminal. Binding of neurotransmitters to postsynaptic membrane receptors produces changes in membrane permeability. The nature of the neurotransmitter and the receptor molecule determines whether the effect produced will be one of excitation or inhibition of the postsynaptic neuron.
Plants use sunlight to convert nutrients into energy. What form of energy transfer is taking place?
The*blank1*energy of the Sun is converted into*blank2*energy by the plants.
options for blank1= chemical, potential, radiant, sound
options for blank2=chemical, kinetic, mechanical, thermal
Answer:
Osmosis is the form of energy.
..
Are all molecules compounds? Why or why not?
Answer:
While all compounds are molecules, not all molecules are compounds. A molecule is formed when two or more atoms of an element chemically join together.
Explanation:
Take a subject of origins or a question you have and write a minimum of 500 words as a research project. Be sure to list all references and resources as part of your bibliography. Other information can be found at a library or other reference source. (It has to be the creation theory because I go to a christian school.)
Answer:
Life on Earth began more than 3 billion years ago, evolving from the most basic of microbes into a dazzling array of complexity over time. But how did the first organisms on the only known home to life in the universe develop from the primordial soup? One theory involved a "shocking" start. Another idea is utterly chilling. And one theory is out of this world! Inside you'll learn just how mysterious this all is, as we reveal the different scientific theories on the origins of life on Earth.Electric sparks can generate amino acids and sugars from an atmosphere loaded with water, methane, ammonia and hydrogen, as was shown in the famous Miller-Urey experiment reported in 1953, suggesting that lightning might have helped create the key building blocks of life on Earth in its early days. Over millions of years, larger and more complex molecules could form. Although research since then has revealed the early atmosphere of Earth was actually hydrogen-poor, scientists have suggested that volcanic clouds in the early atmosphere might have held methane, ammonia and hydrogen and been filled with lightning as well. The first molecules of life might have met on clay, according to an idea elaborated by organic chemist Alexander Graham Cairns-Smith at the University of Glasgow in Scotland. These surfaces might not only have concentrated these organic compounds together, but also helped organize them into patterns much like our genes do now. The main role of DNA is to store information on how other molecules should be arranged. Genetic sequences in DNA are essentially instructions on how amino acids should be arranged in proteins. Cairns-Smith suggests that mineral crystals in clay could have arranged organic molecules into organized patterns. After a while, organic molecules took over this job and organized themselves.
Explanation:
Jayden wants to model the hydrological cycle. He puts some water in a small plastic cup, draws a line on the cup at the water level, and places the cup upright on a window sill. After three days of being undisturbed, the amount of water in the cup is below the line Jayden drew. This is an example of:
A. Transpiration
B. Evaporation
C. Condensation
D. Precipitation
Si la filosofia es un saber acerca de las cosas desde un punto de vista universal, entonces dificilmente sea ciencia
Explanation:
Esta afirmación es correcta, porque si bien la ciencia se deriva de la filosofía, la filosofía es la necesidad humana de obtener conocimientos y así desarrollar un pensamiento racional, crítico y diferente al sentido común, y por tanto se conceptualiza como algo más subjetivo, cultural y más amplio que la ciencia. , que se basa en hechos y estudios para respaldar un análisis. A través de la filosofía es posible desarrollar la ciencia, pero son cosas diferentes porque la ciencia está ligada al empirismo y la filosofía es más amplia y comprensiva.
In cherry tomatoes, red color (R) is dominant to yellow color (r). If two heterozygous plants are crossed, what percentage of the offspring will be yellow?
Answer:
50
Explanation:
If you cross two heterozygous tomato plants, you get four base genotypes of (Respectively,) RR, Rr, Rr, and rr. That makes your percentage A. 50%.
Explain h0mozygous and heter0zygous?If a dominant red fruit (RR) plant is crossed with a recessive over yellow fruit (rr), then the phenotype will be red fruit and the genotype Rr. It is a case of complete dominance.
In diploid organisms (2n), an individual is homo-zygous when it carries two copies of the same gene variant (i.e., the same allele).
Moreover, an individual is heter0zygous when it carries two different alleles for the same gene locus.
In complete dominance, the dominant allele completely masks the expression of the recessive allele in heter0zygous individuals.
Thus, That makes your percentage A. 50%.
To learn more about heterozygous plants click here:
https://brainly.com/question/13912367
#SPJ2
Which of the following statement about gene mutation is not correct. It:
a) Can be inherited
b) May result in a change in the number of bases that make up the gene
c) Always results in a change in the protein for which the gene codes
d) May result in a change in the order of bases that make up the gene
Answer:
c) Always results in a change in the protein for which the gene codes
State the function of Bowman's capsule and glomerulus.
➜ Bowman's capsule and glomerulus have semipermeable walls.
The glomerulus, is a tuft of capillaries contained in Bowman's capsule.The water and dissolved substances (wastes and useful) are filtered into the Bowman's capsule and from here they are filtered into the tubule.Thus, both the structures act as filtering apparatus.