Answer:
Explanation:
D) A boat containing individuals from a different island containing a1, a2, and a3 alleles landed at the island.
This is an example of migration. It is the movement of an organisms into a particular place or habitat. It increase the population of its new environment and decrease the population of the environment it migrated from.
E)The leader (whose genotype is a1a1) declared that only individuals with the a1 have the right to be on the island and mate. All a2, a3 individuals moved to another island.
This is example of selection. Selection is done in a large population to select traits with desired characteristics. Selection helps to have individual with the best features.
F) A man stumbles upon a barrel that has spilled its contents on some rocks. Unknown the to man, who cannot read, the barrel says "Radioactive". He decides to bring one of the new glowing rocks home to show his wife and puts it in his pants pocket.Some of their babies had an a4.
This is an example of mutation. It a sudden heritable change in the genome of an organism. it can be caused by exposure to radioactive material. Mutation can have a detrimental effect on individual carrying it or useful.
A) A devastating fire caused the death of 10 individuals
Drift- Genetic drift leads to the loss of genotype that are less frequently perpetuated or less occuring and are selected against.
B) A disease swept through the island and killed 13 individuals. The a1 confers resistance to the disease.
Selection- they have selective advantage of been resistance to disease.
How do scientists know when life began?
Which of the following IP address format is correct?
O A. 192.165.2.1
B. 123:211:2:1
C. 192,168, 2,1
D. 192;165;2;1
Answer:
The answer is A.
Explanation:
An IP address is a series of four numbers separated by periods.
The defining trait of hominins is
Answer:
Their erected pose, bipedal locomotion, broader brains and behavioural characteristics, such as specialised language communication, are some characteristics that distinguish hominins from other primates, both living and ended.
Explanation:
Answer is above
Hope this helps.
Answer: Some characteristics that have distinguished hominins from other primates, living and extinct, are their erect posture, bipedal locomotion, larger brains, and behavioral characteristics such as specialized tool use and, in some cases, communication through language.
Explanation:
Fungi are important decomposers in terrestrial ecosystems. Some fungi are able to break down lignin in plants, through the production of an enzyme called lignin peroxidase, something that no other organism can do. The ability to break down lignin by some fungi is reflected by which of the statements?
A. Expression of genes necessary to break down lignin were lost in lineages that are not in the evolutionary history of fungi.
B. A mutation occurred in a gene found in some fungi, and the enzyme produced is able to break down lignin.
C. Many organisms have the end to producentymes for breaking down lignin but do not express those genes
Answer:
The correct answer is option B. "A mutation occurred in a gene found in some fungi, and the enzyme produced is able to break down lignin".
Explanation:
The unique trait of expressing lignin peroxidase that some fungi have in order to break down lignin must have being the result of natural selection. Natural selection works under the premise of "survival of the fittest", where a spontaneous mutation gives an advantageous trait to an individual that makes it more likely to survive and reproduce. In this case breaking down lignin gives some fungi the advantage of being able to feed from wood.
Which spheres would feel volcanic eruptions and earthquakes?
Answer:
All spheres feel the effect of a volcanic eruption and earthquake
Explanation:
The spheres considered include the lithosphere, biosphere, atmosphere, hydrosphere and anthroposphere. Volcanic eruptions result from the movement of molten magma from below the earth crust either gently or in an explosive form while earthquakes are caused by the seismic movement of waves in the earth crust resulting in intense shaking. The lithosphere is where both the volcanic eruption and earthquake are triggered. This usually results in damage to the earth crust and damage the surface of the earth crust as well called the mantle. The biosphere made up of plant and animals is usually destroyed by both earthquakes and volcanic eruptions due to being swallowed up below the ground as well as the release of toxic gases from below that can affect their chances of survival. The atmosphere made up of the gases in and around the clouds and air we breathe become polluted, visibility becomes impaired and life unbearable as a result of volcanic eruptions and earthquakes. The hydrosphere made up of water body is seriously affected as pollutants such as toxic substances from the magma and even waste are brought to the surface to contaminate our source of livelihood and survival which is water. Pollutants in the air are also washed into water bodies when it rains. The anthroposphere made up of humans and their activities on the earth surface are severely impacted by volcanic eruption and earthquakes. Scenes of building collapse, molten magma killing humans and destroying buildings will be too much to bear. There will be no food as agriculture will be severely impacted hence making human survival nearly impossible.
What happens when a sodium atom loses an electron in its outer energy
shell?
A. It has an increase in the number of neutrons.
B. It has an increase in the number of protons.
C. It becomes a negative ion.
D. It becomes a positive ion.
Answer:
Sodium will let that electron go as soon as it can, which is why it generally forms ionic compounds such as NaCl. When sodium atom loses an electron from its outer energy shell, it becomes Na+ ion. D is the answer
Explanation:
List ways to reduce your carbon footprint
Answer:
1. Utiliza menos la secadora de ropa
Los tendederos y los rack de secado son una opción amigable con el planeta. Las secadoras de ropa producen una gran cantidad de CO2, al no utilizarlas bajas tu consumo de electricidad (y la cuenta), dejas de producir dióxido de carbono y, además, tienes como aliado al mejor quitamanchas que existe: el sol.
2. Desconecta el cargador de tu celular
Aunque no estés usando el cargador, si lo dejas conectado sigue consumiendo energía y contribuyendo al cambio climático, por eso los llaman ?vampiros de energía?. Lo mismo pasa con el resto de tus aparatos si los dejas conectados: pantalla de TV, computadora, Blu-ray, DVD, etc. La mejor opción es comprar barras multicontacto, con estas podrás desconectar todas tus máquinas en un solo movimiento.
3. Mantén limpio tu refrigerador
El exceso de bolsas de plástico y empaques, así como mantener el congelador con hielo, hacen que tu aparato necesite más potencia para enfriar, y con ello se gasta más electricidad.
4. Saca la bicicleta
Muchos trayectos no justifican el uso del automóvil, ¿por qué no mejorar de paso tu salud recurriendo más a la bicicleta? (Considera también el transporte público).
5. Utiliza bolsas de tela cuando hagas el súper
Seguro esto ya lo sabías, pero uno de los mayores enemigos del medio ambiente el el uso excesivo del plástico, y usar cajas cartón o bolsas de tela al hacer el súper, es una medida necesaria.
6. Regresa al termo
Comprar botellas plásticas con líquido cada que tienes sed es poco amigable con el planeta, mejor compra un termo y lleva en éste tus bebidas. Un beneficio adicional es que podrás controlar mejor la calidad de los líquidos que ingieres pues los llevarás desde tu hogar, y no te arriesgarás con bebidas de dudosa calidad. Con el tiempo verás que el ahorro también será notable.
7. Reduce la ingesta de carnes
Ya se trate de cerdo, res o aves, el proceso para llevarlos a tu mesa gasta una gran cantidad de energía.
8. Mantén tu automóvil en buen estado
Si necesitas seguir utilizando tu coche, mantenlo en buen estado. Los autos con el mantenimiento adecuado, como las llantas infladas correctamente, generan menos emisiones de gases de efecto invernadero, además de que no te dejarán tirado en el camino.
9. Adopta plantas endémicas
Las plantas propias de la localidad donde vives no requieren demasiado uso de agua, y sus beneficios son mayores al absorber el CO2 del aire. Lo mejor sería que plantaras un árbol, pero si no cuentas con el espacio o las condiciones necesarias, puedes explorar algunas ideas alternativas como los jar
dines verticales.
10. Recuerda las tres erres
Busca tener presente siempre el significado de las tres erres y procura aplicarlas siempre que puedas: Reduce, Reutiliza y Recicla.
The illustration below shows the steps of meiosis I.
The steps of meiosis 1 are shown. In step A, the chromosomes pair up. In step B, the homologous pairs line up for separation. In step C, the pairs are separated. In step D, sister chromatids stay together. In step E, 2 new cells are formed.
What is the step that is labeled D?
metaphase I
metaphase II
telophase II
telophase I
Answer:
Telophase I
Explanation:
Meiosis is a kind of cell division employed by sexually-reproducing organisms to produce gametes. It involves the production of four daughter cells (gametes) that each have a reduced number of chromosomes as the parent. Meiosis occurs in a two step division (meiosis I amd II), that involves four major steps each viz: Prophase, Metaphase, Anaphase, and Telophase
In meiosis I, homologous chromosomes (similar but non-identical chromosomes received from each parent) are involved in the steps.
Prophase I- Homologous chromosomes pair up to form a TETRAD structure called synapse. This describes step A
Metaphase I- Homologous chromosomes line up at the cell's equator in order to be pulled apart by spindle microtubules. This describes step B
Anaphase I- Homologous chromosomes are pulled apart to opposite poles of the cell. This describes step C.
Telophase I- Each homologous chromosome consist of two sister chromatids, which remain together in opposite cells. This describes step D
Step E described Cytokinesis, which is the separation of the cell into two daughter cells.
Hence, step D is the Telophase I stage.
Answer:
telophase I
Explanation:
how will the lever of carbon in the atmosphere change if humans do nothing to reduce their impact on the carbon cycle
Answer: The amount of carbon dioxide will keep on increasing in the atmosphere because there are various sources by which it can be released into the environment. The burning of fossil fuel, emission from vehicles, gases released from industries contributes to the increase in amount of carbon dioxide in environment.
Explanation:
What is the basic unit of life
Technically this can be answered in a number of ways. But in elementary biology the cell is considered to be the basic unit of life.
Which molecular formula corresponds to this model of a chemical compound? (black = carbon; red = oxygen; white = hydrogen) A ball-and-stick model has two black balls bonded to each other at center, with single-bonded red balls bonded to white balls above left and below right, and double-bonded red balls above right and below left. C2(OH)4 C2H2O4 C2H4O2 C4H2O2
Answer:
C2H2O4
Explanation:
The molecular formula corresponds to this model of a chemical compound is to be considered as the C2H2O4.
Molecular formula:Since
Two black balls (C) bonded to each other at the center = C2
And,
Single-bonded red balls (O) bonded to white balls (H) above left and below right = (OH)2 = O2H2
And,
Double-bonded red balls above right and below left = O2
So if we add this
So it comes
= C2 + O2H2 + O2
= C2H2O4
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The amoeba is a protozoan that moves with _____.
Answer:
Pseudopod
Explanation:
The chemical equation below summarizes cellular respiration. 6O2 + C6H12O6 à 6CO2 + 6H2O + energy The energy that is released by cellular respiration is in the form of dark energy. solar energy. nuclear energy. chemical energy.
Answer: chemical energy
Explanation:
I did the test
Answer:
chemical energy
Explanation:
edg 2020
what is echolocation
Answer:
The location of objects by reflected sound, in particular that used by animals such as dolphins and bats.
Explanation:
Answer:
When you use sound to find things because the sound bounces back of the object
Dolphins use it
I contain cytoplasm
Answer:
Cytoplasm is Located inside the cell between the nucleus and the cell membrane.
Salmon are bony fish (teleost) that spend considerable portions of their lives in the ocean. In this environment, values of salmon plasma osmolarity are about 300 mosm. As they swim about in the ocean, which statement is true?
A. There will be no net force to drive water either into or out of the fish.
B. There will be a net pressure for water to enter the fish.
C. There will be a net pressure for water to flow out of the fish.
D. Osmotic pressure will first force water into the fish, and then with time flip and force water out of the fish.
E. Pressures will first force water out of the fish, and then with time flip and force water into the fish.
Answer:
B. There will be a net pressure for water to enter the fish.
Explanation:
Salmon are born in fresh water and migrate to oceans for most of their life. They maintain homeostasis through the process of osmoregulation, where salmon control osmosis to maintain a water balance in ocean.
The salt water is hypo-tonic to their surroundings so the water molecules move out of the body cells as a result of osmosis and salmon dehydrates. Then the hormones of salmon help to adapt the condition and their will be a net pressure for water to enter the fish.
Hence, the correct option is B.
Fire and Mello conducted an experiment where they added no gene X RNA (b), anti-sense gene X RNA (c) or double stranded gene X RNA (d) to C. elegans embryos. They then did a hybridization experiment examining gene X mRNA levels in the embryo. Imagine this experiment was a protein X western blot (using an anti-X antibody) instead of a hybridization experiment. Describe the expected results.
If this experiment was a protein X western blot (using an anti-X antibody) instead of a hybridization experiment then:-
The targeted proteins will be detected with the help of anti-X antibody.There will be no blocking of m- RNA called the phenomenon of RNA interference.What was Mello and Fire experiment?They detected that double-stranded RNA can silence genes that this RNA interference is specific for the gene whose code matches that of the injected RNA molecule.The RNA interference can spread between cells and even be inherited.To know more about RNA interference here
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Please help me if you know help me with 2 and 3 please
Answer:
2.)how much a certain area can hold is carrying compacity
3>)if a disease killed most of the producers the species would have a chance of dying out
Explanation:
Which is inference? You measure A plants height every day for a week-you give a plant the same amount of water every day-every day for a week you collect data on a plants movement- After watching a plant for a week, you determine it needs more sunlight
Answer:
After watching a plant for a week, you determine it needs more sunlight
Explanation
Inference is a conclusion so you concluded the plant needs more sunlight.
A scientist investigates two types of cells located in different parts in the
human body. Cell A contains many more mitochondria than Cell B. What is
the best conclusion to make from this observation?
A. Cell A has a larger vacuole than Cell B.
B. Cell A produces more protein than Cell B
C. Cell B does less work than Cell A.
D. Cell B creates more energy than Cell A.
Answer:
Mitochondrion.The function of mitochondrion is it used as a site for cellular respiration.
Respiration produces energy as the end product.
so,the higher the amount of mitochondrion,the higher the energy produced by respiration.
thermometer measures air temperature. The second thermometer
has a wet bulb. As water evaporates from the wet bulb, its
temperature decreases relative to the air temperature.
1. Do you think the wet bulb will cool down more on a dry or humid day?
Using the biological species concept as your guide, sort the following observations based on whether they support the notion that the Big Bird lineage is a separate species or whether they refute the notion that it is a separate species.
Supports separate species: Big Bird males hold territories in and around territories of other species but breed only with Big Bird females. Big Birds have their own unique call. There is no gene flow in or out of the Big Bird populationRefutes
Separate Species: big bird can vreed with G fortis females
Answer:
According to the biological concept of species, this statement confirms that the Big Bird lineage is a separate species.
Explanation:
The biological species concept states that species are groups of organisms capable of interbreeding and producing fertile offspring. Ernst Mayr (1970) literally stated that "species are groups of interbreeding natural populations that are reproductively isolated from other such groups". This statement is consistent with the lack of gene flow and reproductive isolation. In consequence, the biological concept of species is supported by above described, i.e., Big Bird males breed only with Big Bird females.
You can read this book:
Mayr, E. (1970). Populations, species, and evolution: an abridgment of animal species and evolution (Vol. 19). Editorial: Harvard University Press.
20 words about body, health, or disease.
does a dog like me? Is scientific or nonscientific
Answer:
dogs loves there owners and to be a owner you must love and to love you need to really love :)
Explanation:
so if your a good person to call your self a owner then yes you are!!!
Answer:
Non scientific.
Explanation:
Whether or not a dog likes you cannot be truly proven, and is more of a subjective query. A dog cannot really like or dislike a person. They can trust or not, they can be loyal or not, dominating or not, and such things, but “like” is an extremely opinionated term.
Analyze the given diagram of the carbon cycle below. Part 1: Which process does arrow F represent? Part 2: Explain how matter is conserved during the process. Part 3: Justify why this process is a recycling of carbon in the carbon cycle. Use complete sentences to explain your answer.
Answer:
F means oxygen from plant goes into the atmosphere.Explanation:
2. matter is conserved in this process because plants take carbon dioxide from the atmosphere for photosynthesis then produces oxygen into the atmosphere, animals then feed on plants and later the animal's faecal matter is released into the soil and even when animals die, microorganisms in the soil break I down into absorbable form for plants use. which makes matter conserved.
3. mater is in a circular state from atmosphere to plants to animals to soil then absorbed by plants to restart the process again.
hope it helps .
The_ of the cell directs cell activity and acts like the control center.
Answer:
Nucleus
Explanation:
The Nucleus is the central and most important part of an object, movement, or group, forming the basis for its activity and growth.
Answer:
nucleous
Explanation:
itacts like the control center
Which of the following wrap around neurons and speed up signals
Explanation:
myelin sheath ..........
Maximum oxygen uptake, or V02max, is the point at which the rate of oxygen consumption reaches a platesu despite an increased workload. Consider the scenarios below, then click and drag each label into the appropriate category based on whether it increases Vo2max, decreases VOzmax, or neither
Lactic acid accumulaton Being male Being sedentary Training for a marathon
Centrai fatigue Being temale Gernting older weight raining
Results Iin Higher VO,max Results in Lower V02max Neither
Answer:
A. Results in higher vo2 max.
1. training for the marathon
2. weight training.
B. Results in lower vo2 max
1. lactic acid accumulation.
2. getting older
3. sedentary lifestyle
4. being female.
C. Neither.
1. being male
2. central fatigue
Explanation:
VO2 max is the measurement of the maximum oxygen consumption during continuously increasing exercise. Higher VO2 means the body is consuming a higher level of oxygen and delivering to muscles without muscle loss on this basis we can sort the following scenarios
A. Results in higher vo2 max.
1. training for the marathon (more oxygen consumption)
2. weight training. (more oxygen consumption)
B. Results in lower vo2 max
1. lactic acid accumulation.
2. getting older (less oxygen consumption and less oxygen delivery to muscles)
3. sedentary lifestyle (less oxygen consumption and less oxygen delivery to muscles)
4. being female.
C. Neither.
1. being male
2. central fatigue
A. Effects in higher vo2 max.
1. training for the marathon
2. weight training.
B. Outcomes in lower vo2 max
1. lactic acid accumulation.
2. getting older
What is the Maximum oxygen?
VO2 max is the measure of the maximum oxygen consumption during constantly increasing exercise. Higher VO2 represents the body is downing a higher level of oxygen and also delivering it to muscles without muscle loss on this basis we can sort the following scenarios
A. Effects in higher vo2 max.
1. training for the marathon (more oxygen consumption)
2. weight training. (more oxygen consumption)
B. Consequences in lower vo2 max
1. lactic acid accumulation.
2. getting older (less oxygen consumption and less oxygen delivery to muscles)
3. sedentary lifestyle (less oxygen consumption and less oxygen delivery to muscles)
4. being female.
C. Neither.
1. being male
2. central fatigue
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Question 1
If the cells and their genes are functioning normally.,
Answer:
If the cells and their genes are functioning normally so then the body of organism grow and develop rapidly.
Explanation:
Cell is a basic unit of life. Each cell contains about 30,000 genes which are responsible for performing different functions in the cell. Cell only activated a small portion of gene not the whole gene. Genes are made of DNA which helps in the production of proteins necessary for the normal functioning of the cell. If the cell and their genes are functioning normally so the body of living organisms also work properly and grow quickly.
In the yawncat (a rare hypothetical animal), the dominant allele R causes solid tail color, and the recessive allele r results in white spots on a colored background. The black coat color allele B is dominant to the brown allele b, but these genes can only be expressed if the animal has an mm genotype at a third gene locus. Animals that are M- are yellow regardless of which allele from the B locus is present. A mating between a solid yellow-tailed male yawncat and a solid brown-tailed female yawncat produce 16 offspring with the following tail phenotypes: six solid yellow, two spotted yellow, three solid black, one spotted black, three solid brown, and one spotted brown.
a. What are the most likely genotypes of the male and female parents? Explain the strategy used to determine the genotypes.
b. What is the probability of the next offspring having a solid brown tail?