Answer:
25 chromosomes
Explanation:
There are two principal types of cells in the organism: Somatic diploid cells (2n) that reproduce by the process of mitosis, and germ cells that are diploid reproductive cells in charge of gamete production. Germ cells divide by mitosis and meiosis. Through the process of mitosis, they originate more sexual cells, but through the process of meiosis, they give place to haploid gametes, called sperm and egg cells, through the gametogenesis process.
Gametes´destiny is to merge during fecundation, and a new diploid cell called zygote emerges through fertilization. The zygote is a complete cell and suffers successive mitosis to form the new organism.
Meiosis produces four daughter haploid cells (n) from a diploid germ cell (2n). Each daughter cell is haploid because they have half the number of chromosomes of the original one.
So, in the exposed example
"...cells of a pineapple plant have 50 chromosomes in their nuclei..."
These might be diploid somatic or germ cells. The number of chromosomes, 2n = 50.
Germ cells in plants suffer meiosis and produce gametes.
Gametes of plants are ovocell and pollen grains. Ovocell is the feminine gamete, while the pollen grain is the masculine gamete.
The pollen grain is haploid and its number of chromosomes n = 25.
A farmer tested the soil in a field and found that there was a high nitrate salt concentration. The farmer then grew a crop in this field. After the crop was removed, the soil was tested again. The nitrate salt concentration had decreased.
Answer:
The crops has extracted the nitrates from the soil
Explanation:
Complete question
Why?
Solution
The crops has extracted the nitrates from the soil for its nourishment and metabolic requirement. Hence, the concentration of nitrate after the crop cultivation has reduced as compared to the concentration of nitrate prior to the crop cultivation.
what havoc would be caused if a horse was suddenly at the top of the food chain
that would be.... immensely chaotic
What are the causes of wildfires?
Answer:
Humans and Wildfire
Human-caused fires result from campfires left unattended, the burning of debris, equipment use and malfunctions, negligently discarded cigarettes, and intentional acts of arson. Lightning is one of the two natural causes of fires.
Hope it's help
Correct me if I'm wrong
Explanation:
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descirbe your house to your classmate who plans to attend your birthday party
Answer:
3 bedrooms 4 bathrooms
Explanation:
Which feature of Earth is part of the geosphere?
O air
O fish
O rocks
Oglaciers
HELP ME PLEASEEEEE
Answer:
Rocks
Explanation:
Geo means “earth.” The Earth’s geosphere (sometimes called the lithosphere) is the part of the Earth that includes all the rocks, minerals and landforms of the surface and interior that make up the Earth. It starts at the ground and extends all the way down to Earth’s core.
The feature of the Earth that is part of the geosphere is rocks. The correct option is C.
What is the geosphere?The geosphere is made up of every rock on Earth, from the melting rock beneath the crust to the massive, age-old mountains to the sand grains on the seashore.
The biosphere, a global ecosystem that includes all life on Earth, has a home in both the geosphere and the hydrosphere and lithosphere, etc. Organisms live in both, the geosphere and the hydrosphere.
The geosphere is always moving because the tectonic plates are always moving, and they sometimes collided with each other. The formation of new landmass, volcano eruptions, lava, molten magma, plants and other things, earthquakes, etc. all happened in the geosphere.
Thus, the correct option is C. rocks.
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The following map of the Gulf of Mexico shows reported sightings of whale sharks. What explanation best describes why the highest reported sightings occur near the mouth of the Mississippi River?
Whale sharks are bottom feeders, and this area is rich in bottom dwellers due to runoff.
Whale sharks are bottom feeders, and this area is rich in nutrients due to runoff.
Whale sharks are filter feeders, and this area is rich in plankton due to runoff.
Whale sharks are filter feeders, and this area is rich in fish populations due to runoff.
Why is a female skeleton smaller, and not as wide a male skeleton?
Can someone please explain?
Answer:
A male's skeleton is usually thicker, rougher and appears more bumpy. ○ Due to the fact that males have larger muscles and therefore their skeletons require stronger attachment sites. Women who have borne children have scars on the surface of their pelvis. The femur (thigh bone) of a male is thicker than a females.
A particular enzyme will usually interact with... *
What did Darwin discover about plants from his phototropism experiments?
Answer:
https://www.biology-pages.info/T/Tropisms.html
Explanation:
This link holds all the information you need :D
What process is described in the situation above? a. respiration c. feedback inhibition b. circulation d. cellular activity
Question isn't complete but explanation will be given for each option
Answer and Explanation:
A. Respiration: respiration occurs when organisms take in oxygen, combine it with glucose to release carbon dioxide, water and ATP. Respiration is different from breathing since it is more of a biochemical process than physical process.
B. Feedback inhibition: feedback inhibition occurs in metabolism when an the end product of an enzyme inhibits further production of end products by the enzyme in order to reduce concentration and reduce waste that occurs when more is produced than needed by cells.
C. Circulation: circulation involves the heart, arteries and veins whereby the heart pumps blood( which carries oxygen,hormones and nutrients) and the arteries move them in circulation through the body and back to the heart through the veins, giving off waste products.
D. Cellular activity: cells are the most basic form of life known. Cellular activities are basically the activities of cells in an organism. Examples of cellular activities include: work of enzymes in digestion, cell division, synthesis of protein from amino acids etc.
Answer: C
Explanation:
Just did the quiz
A diagram illustrates that grass is eaten by insects, birds, and mice. The insects are eaten by hawks, snakes, and toads. The birds and mice are eaten by foxes, hawks, and snakes. The toad is also eaten by the snake. Which best describes the diagram?
pyramid
food chain grid
food web
trophic level
Answer:
Food web
Explanation:
food web:
a system of interlocking and interdependent food chains.
Answer:
food web
Explanation:
food web consists of all the food chains in a single ecosystem. Each living thing in an ecosystem is part of multiple food chains.
Name the two principles of Mendelian genetics: Principle of ______ and Principle of ______.
the principle of segregation
the principle of independent assortment
Hydra is called a diploblastic animal .Why?
Jasmine and Marcus are at the park, and Jasmine makes the following statements. Which of them is an inference?
Answer:the plant is producing oxygen so c
Explanation:
Question 3 of 10
The surface area of a sphere can be approximated as follows:
Surface area = 411/2;
where ris the radius of the sphere;
Ti is a constant that is roughly equal to 3.
Using the simple approximation above, calculate the surface area of a sphere
with a radius of 5 meters.
A. 500 m2
B. 900 m2
C. 3,600 m2
D. 300 m2
Answer:
D. 300 m²
Explanation:
A sphere is a three dimensional object with a surface which as like that of a ball. A sphere is a set of points that are all at the same distance r from a given point in a three-dimensional space.
The surface area of a sphere is:
Surface area = 4πr²
where r is the radius of the sphere, π is a constant = 3
Given that r = 5 meters, hence substituting into the area equation:
Surface area = 4π(5)² = 4(3)(5)² = 300 m²
Does a virus have an independent lifecycle?
Which of the following objects could be used to model the structure of a DNA molecule?
A. a snowflake
B. a ladder
c. a three-dimensional cube
D. a branching tree
Answer:
Ladder
Explanation:
The structure of the double helix is often described as being like a ladder that has been twisted into a spiral shape. Therefore, option (B) is correct.
What is the structure of DNA?DNA (deoxyribonucleic acid) is a long, linear polymer that is made up of repeating units called nucleotides. Each nucleotide consists of a sugar (deoxyribose), a phosphate group, and one of four nitrogenous bases: adenine (A), guanine (G), cytosine (C), or thymine (T). The sequence of these nitrogenous bases determines the genetic information encoded in DNA.
One of the most common models for the structure of DNA is the "double helix" model, which was proposed by James Watson and Francis Crick in 1953. This model depicts DNA as a double-stranded helix that is held together by hydrogen bonds between the complementary nitrogenous bases A and T, and G and C. The two strands of the helix are antiparallel, meaning that they run in opposite directions. The structure of the double helix is often described as being like a ladder that has been twisted into a spiral shape.
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PLEASE HELP ASAP LOL 50 POINTS
Answer:
I think it 50 answer
I think it is the answer
Explain how is sunlight distributed across the world
Answer:
The sun is distibuted across the world due to The environment works in a similar way to a car's heat engine. Winds, precipitation, and evaporation processes in the atmosphere, on the other hand, spread the sun's energy across the Earth. Conduction, convection, and radiation are the methods through which heat energy is transferred.
Explanation:
I took earth science
Which of the following scientists DID NOT disprove spontaneous generation? *
Pasteur
Hooke
Redi
Spallanzani
Hooke didnt disprove spontaneous generations!
10. The organ that stores swallowed food and liquid, mixes up digestive juices with
the food and liquid, and sends it to the small intestine.
A. Mouth
C. Stomach
B. Rectum
D. Intestines
Answer:
stomach
Explanation:
stomach is the answer pal
Answer:
Stomach
Explanation:
Stomach is the organ that stores swallowed food and liquid, mixes up digestive juices withthe food and liquid, and sends it to the small intestine.
Un laboratorio que produce una fórmula para matar piojos recibió muchas quejas de parte de sus
clientes debido a que la efectividad del producto fue disminuyendo con el tiempo. Debido a esto
decidió cambiar la fórmula y el nuevo producto es capaz de eliminar el 100% de los piojos. ¿Cómo
explicarías que el primer piojicida fue perdiendo efecto con el tiempo? ¿Te parece que el nuevo
piojicida va a evitar recibir quejas luego de pasado un tiempo? ¿Por qué?
Answer:
Es probable que a través del tiempo la población de piojos también se vuelva resistente al segundo pijojicida. Los piojos resistentes se generan por un proceso de selección natural
Explanation:
La evolución es el proceso mediante el cual los organismos cambian (evolucionan) con el tiempo con el fin de adaptarse a sus condiciones ambientales. La selección natural opera seleccionando aquellos individuos mejor adaptados al ambiente en el cual cada individuo se desarrolla. Los individuos adaptativamente superiores poseen más chances de sobrevivir y de reproducirse, trasmitiendo de este modo sus genes a la descendencia. Las mutaciones representan la fuente principal de variabilidad genética en la forma de nuevos alelos y genes. Las mutaciones que son beneficiosas y confieren una ventaja adaptativa son seleccionadas por selección natural. En este caso, la resistencia al primer piojicida se debió a la aparición de una o más mutaciones las cuales confirieron resistencia al primer compuesto. Con el tiempo, la frecuencia de los individuos portadores de mutaciones beneficiosas en la población de piojos fue incrementándose paulatinamente (como resultado del proceso de selección natural). Es muy probable que este proceso evolutivo también se repita con el segundo piojicida.
Healthy biodiversity provides
A. Protection of water resources
B. soils formation and protection
C. Nutrient storage and recycling
D. all of the above
According to the principle of maximum parsimony,
A. phylogenies based in DNA require the most base changes.
B. the preferred tree is the one that minimizes the amount of evolutionary change.
C. a large number of trees should be examined.
D. in the case of trees based on morphology, a parsimonious tree requires the most changes.
Answer:
The correct answer is B. the preferred tree is the one that minimizes the amount of evolutionary change.
Explanation:
The principle of maximum parsimony selects the cladogram or phylogenetic tree that explains the phylogeny that has the minimum number of evolutionary changes. It is based on the principle known as Occam's Razor (Occam’s razor) formulated by William Ockham in the 14th century. This principle refers to a type of reasoning based on a very simple premise: other things being equal, the simplest solution is probably the correct one. This is because the simplest solution requires the least number of assumptions and logical operations. The basic premise in Parsimony is that taxa that share a characteristic (similarity) do so because they inherited that characteristic from a common ancestor, homology.
Which statement is true about the Earth’s oceans?
Answer:
They are all getting larger due to the movement of tectonic plates statement is true about the Earth’s oceans.
Answer:
Select the statement that describes this expression: 10 + one fourth x (5 + 3) – 3.
Explanation:
1. Describe the structure of DNA.
2. What does a nucleotide consist of?
3. What are the base-pairing rules?
4. If one DNA strand reads CCGTAATGCAT, what will be the sequence of the
complementary strand?
Answer:
DNA bases pair up with each other, A with T and C with G, to form units called base pairs. Each base is also attached to a sugar molecule and a phosphate molecule. Together, a base, sugar, and phosphate are called a nucleotide. Nucleotides are arranged in two long strands that form a spiral called a double helix.
A nucleotide consists of a sugar molecule (either ribose in RNA or deoxyribose in DNA) attached to a phosphate group and a nitrogen-containing base.
GGCATTACGTA
Explanation:
*HELP ASAP
Depletion of nonrenewable resources is often a result of:
1)environmental laws
2)human population growth
3)reforestation
4)recycling
Answer:
Depletion of nonrenewable resources is often a result of reforestation.
Answer:
2 -- Human Population Growth
Explanation:
The rest have no effect on nonrenewable resources because they are renewable, or replenishable. The more humans expand, they more resources they need such as gas, coal, and oil. Due to the fact that resources such as those listed before can't be renewed, or replenished, it causes a loss in those resources (depletion).
5 Which situation would be most likely to cause a DNA mutation? O A A wood frog in a lake is exposed to temperatures below 0°C during the wi OB. A person spends one hour each day under the ultraviolet rays of a tanning OC. A maple tree becomes dormant to prevent water loss during a drought. OD. A culture of cells is placed in a chamber and exposed to high pressure for Reset Nex
Answer:
B. A person spends one hour each day under the ultraviolet rays of a tanning bed.
Explanation:
Genomics refers to the scientific study of genes (DNA) found in living organisms such as humans and animals.
A genome can be defined as the complete set of hereditary instructions that is typically found in the deoxyribonucleic acid (DNA).
Deoxyribonucleic acid (DNA) is an organic complex-molecular structure found in all living organisms.
Basically, it comprises of genes and is essentially the foundation block of all living organisms such as humans, animals and plants.
Mutation can be defined as an alteration in the DNA sequence (nucleotide sequence) of a cell of a living organism either due to improper transcription, genome editing or environmental factors such as smoking, ultraviolet (UV) light, etc.
Hence, when a person spends one hour each day under the ultraviolet rays of a tanning bed, it's most likely to cause a DNA mutation. A continuous exposure to ultraviolet (UV) light would cause an uncontrolled division of certain body cells, which then invade the surronding tissues and interfere with the normal functioning of the body.
How many meters does sunlight reach down into the ocean?
Under the appropriate circumstances, sunlight entering the sea can penetrate around 1,000 meters into the ocean, although there is rarely much light beyond 200 meters.
The euphotic zone can stretch down to a depth of 80 meters (m) in crystal-clear tropical waters. The euphotic zone may be less than 10 m deep in places close to the poles since sunlight does not penetrate there as deeply. The euphotic zone may only be a few centimeters deep in murky, turbid water.
Light can only go so far below the ocean's surface due to the ocean's extreme depth. The water molecules scatter and absorb the light energy as it passes through them. Light is so dispersed at great depths that nothing is left to be detected.
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The products of cellular respiration are
Answer:
ATP, carbon dioxide, and water.
Explanation:
ATP, carbon dioxide, and water are all products of this process because they are what is created.