Answer:
Mitochondrion
Explanation:
How to separate genomic DNA and plasmid?
...?
The hypothesis that continents have moved slowly to their current locations is called
which of the following best illustrates the role that gravity played in the in the formation of the solar system? (A) gravity removed excess gas and dust from the cores of the planet (B) gravity pulled particles of dust and gas together to form planes (C) gravity caused the nebula to cool enough for planets to form (D) gravity allowed the nebula to expand and move outward
Answer:
(B): Gravity pulled particles of dust and gas together to form planets.
Explanation:
I took the test (030)
Answer:
Option B. Gravity pulled particles of dust and gases together to form planets.
Explanation:
The definition of gravity in relation to astronomy can be compiled as the force by which planets and other heavenly bodies attract objects towards its center.Our solar system was formed 4.5 billion years ago due to a stellar explosion called supernova which scattered gases and dust into space.Some of the bodies with a larger mass and potential gravitational pull must have attracted particles, dust, material, and gases to form planets with an atmosphere revolving around the central star i.e., Sun.For more information:
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DNA is coiled into chromosomes in a cells
The right answer is in a cell's nucleus.
The nucleus contains the DNA (deoxyribonucleic acid) on which is encrypted the genetic information: the chromosomes.
When the cell is not in a fission period, the DNA is pelletized and the chromosomes can not be seen. On the other hand, as soon as it enters the period of fission, the DNA unfolds and the chromosomes are clearly visible in batonets, so that they can be doubled.
Over the last several decades, the scientific community has gathered a large amount of information regarding genetics and genetic variation. What are two main sources that lead to increased genetic variation?(((((Both answers must be selected.))))) A) Selective breeding, B) Gamete mutations, C) Recombination, D) Genetic drift
Answer:
B) Gamete mutations, C) Recombination
Explanation:
Any random changes in the DNA of gametes are called as gamete mutations. These mutations are transmitted to the next generation via gametes and thereby the genetic variations are increased.
Recombination is the production of new gene combinations. Crossing over during meiosis I of gamete formation add new gene combinations to gametes. Random fertilization of these gametes add even more genetic variations to the progeny.
what is the knee cap called
The knee cap is called Patella.
Explanation:The patella is a bone that is flat and circular-triangular in structure It is attached with the femur (thigh bone) and protects and covers the inner surface of the knee.A newly born human baby consist of a petella that is made up of soft cartilage, after attaning four year of age it changes to bone(patella) and develops into bone after 4 year of age.It protects anterior(inner) knee from direct impact.Result: knee cap is called Patella.
During the teen years, our self-esteem usually
stay the same
increase
decrease
increases, then decreases rapidly
How does natural selection support the theory of evolution?
a) Natural selection explains how the changes in life forms that evolve over millions of years take place over shorter periods of time.
b) Natural selection explains how certain life forms are able to survive and reproduce after changes in their environmental conditions.
c) Natural selection comes from the collection of fossil record data that shows how life forms.
Explain the interaction between the central nervous system and the peripheral nervous system.
The crucial regulatory, controlling and communicating system of the body is called the nervous system. It has an important role in acquiring and giving responses to a stimulant.
How do Central nervous system and PNS interact?The central nervous system comprises of the brain and spinal cord while the PNS have nerves spread throughout the body parts.The PNS connects the central to the body tissues, organs and skin structures with the help of nerves. The central nervous system receives information from the PNS via the nerves and helps in transmitting the response to the action received.Therefore, PNS and central nervous system are interrelated to each other for functioning.
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1.
Which of the following is true about ice sheets?
They are the smallest type of glacier.
They flow in all directions.
They usually flow down valleys.
They are found only in high mountain areas.
2.
The Antarctic Ice Sheet in the Southern Hemisphere ____.
is the only true ice sheet that remains on the planet
holds almost one-half of Earth’s salt water
holds almost two-thirds of Earth’s fresh water
contains about one-fourth of the world’s ice
3.
A thick ice mass that forms over the land from the accumulation, compaction, and recrys1.
Which of the following is true about ice sheets?
They are the smallest type of glacier.
They flow in all directions.
They usually flow down valleys.
They are found only in high mountain areas.
2.
The Antarctic Ice Sheet in the Southern Hemisphere ____.
is the only true ice sheet that remains on the planet
holds almost one-half of Earth’s salt water
holds almost two-thirds of Earth’s fresh water
contains about one-fourth of the world’s ice
3.
A thick ice mass that forms over the land from the accumulation, compaction, and recrys ...?
If a person with o blood type produces offspring with a person with b blood type, then what percentage of their offspring will be type o in the best case scenario?
Answer:
In humans, blood group is determined by three alleles [tex]I^{A}[/tex], [tex]I^{B}[/tex], and [tex]i[/tex].
[tex]I^{A}[/tex] and [tex]I^{B}[/tex] are co-dominant whereas [tex]i[/tex] is recessive to other two.
Thus, if a person with blood group O produces offspring with blood group B then the other parent must contain [tex]I^{B}[/tex] allele.
The genotype of other person can be [tex]I^{A}I^{B}[/tex], [tex]I^{B}I^{B}[/tex], or [tex]I^{B}i[/tex].
There is only one condition in which the person can have offspring with blood group O that is, when the other parent is [tex]I^{B}i[/tex].
In this condition, the probability of an offspring to have blood group O is 50%.
In other conditions, the probability of an offspring to have blood O is 0%.
In the best case scenario where the type B parent is heterozygous (BO), there is a 50% probability that the offspring produced with a type O blood person (ii) will have type O blood. If the type B parent is homozygous (BB), all offspring would be type B with no possibility of having type O blood.
Explanation:Offspring Blood Type ProbabilityWhen a person with type O blood (genotype ii) produces offspring with a person with type B blood, the offspring's blood type depends on the genotype of the type B parent. Provided the type B parent is heterozygous (genotype BO), which is the best case scenario for offspring to have type O blood, the possible genotype combinations would be Bi and iO.
The offspring would have a 50% chance of inheriting the O allele from the type O parent (genotype ii) and the O allele from the type B parent (BO), resulting in a genotype of type O (ii) for the offspring. Consequently, the offspring would have a 50% probability of having type O blood.
If, however, the type B parent is homozygous (BB), then all offspring would inherit one B allele and would not have the chance of being type O. Thus, they would all be type B.
Pure water is neutral. What is the appropriate justification for this? A. Water has equal H+ and OH- ions, making its pH 7, which is considered a neutral pH. B. Water has more H+ than OH- ions, making its pH 5, which is considered a neutral pH. C. Water has more OH- than H+ ions, making its pH 8, which is considered a neutral pH.
Pure water is neutral because it has equal concentrations of H+ and OH- ions, resulting in a pH level of 7, which is considered neutral on the pH scale.
Explanation:The justification for pure water being neutral is A. Water has equal concentrations of H+ and OH- ions, which results in a pH level of 7. The pH scale ranges from 0 to 14, with 7 being considered neutral. Lower than 7 is acidic and higher than 7 is basic or alkaline. Therefore, since water has a pH of 7, it's considered neutral.
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What is an important function of the mitochondria?
Explanation:
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Let's solve this!
Mitochondria with organelles present in eukaryotic cells. In them, cellular respiration occurs, a process by which carbon dioxide is converted into oxygen. In addition, the Krebs cycle that is part of cellular respiration occurs.
Organisms at the bottom of the pyramid produce enough usable chemical energy to support the entire ecosystem through
A) predation.
B) photosynthesis.
C) cell respiration.
D) anaerobic respiration.
Answer: The correct answer is -
B) photosynthesis
Explanation:
Photosynthesis can be described as process of creating food (in the form of glucose) in green plants, algae, and some protist (that are called producers). It uses inorganic molecules that are carbon dioxide and water in the presence of energy from sunlight to synthesise glucose and release oxygen as waste in surroundings.
It takes place in the specialized membrane bound organelles, called chloroplast.
Producers occupy the base of any food chain, which can be represented by energy pyramid, thus they produce enough chemical energy to support the entire ecosystem through photosynthesis.
Which of the following is NOT true about ATP?
glucose breaks down into ATP without any initial energy input. (It just spontaneously happens)
Energy is stored in the bonds of the phosphate group
cells make and use ATP
ferns, slime molds, dogs, and fish all use ATP for energy in the cells
Which of the following best describes the fate of energy in ecosystems?
a. It will ultimately be recycled back into the ecosystem.
b. It flows from secondary consumers to primary consumers.
c. It enters most ecosystems in the form of sunlight.
d. It flows through and is used by ecosystems.
Answer:
d.
It flows through and is used by ecosystems.
Explanation:
write a paragraph explaining the relationship between detritivores and decomposers in the ecosystem.
The name dinitrogen tetroxide tells you that this compound contains
Can a dead cell carry out diffusion and active transport?
No, a dead cell cannot carry out active transport as it requires ATP, which dead cells do not produce. Diffusion may continue passively for some time, but active processes cease with cell death.
Can a dead cell carry out diffusion and active transport? No, a dead cell cannot carry out active transport because active transport requires energy, which is usually obtained from ATP. Living cells use metabolic energy to maintain concentration gradients of ions and other substances across their membranes. This energy is particularly crucial for active transport processes such as the Na+-K+ ATPase pumps in red blood cells, which maintain the imbalance of sodium and potassium ions across the cell membrane. Once a cell dies, it ceases to produce ATP, thus halting active transport mechanisms. While diffusion is a passive process that might continue for a time after a cell perishes due to existing concentration gradients, without ATP, the active transport processes cannot occur in a dead cell.
Muscles are attached to bones by _____.
marrow
tendons
ligaments
skin
Tendons! Hope this helps :)
which of the following is an organic molecule? A. LiF B. C3H8 C.SO2 D.H2O
Answer:
C3H8
Explanation:
What are microwaves are used for?
A. cell phone transmitters and cooking food
B. T.V. signals
C. visible light
Which of the following is not a contributing factor to the declining Atlantic cod population?
A.) Destruction of marine habitats
B.) Increasingly efficient fish-harvesting technologies
C.) International treaties reducing competition among fishing fleets
D.) Decreases in ocean temperatures
Why is it important for the cells of multicellular organisms to undergo mitosis?
The two main processes by which plant cells absorb,release, and use energy are
Answer:
The answer are:
- Respiration.
- Photosynthesis.
Explanation:
Respiration allows plants to produce the necessary energy to perform their vital functions. Respiration of plants requires an exchange of gases between the plant and the environment, since when breathing, plants take oxygen from the environment and expel carbon dioxide (CO2) to the environment. Photosynthesis is a process that plants carry out to manufacture their own food from various elements that they find in their environment, such as sunlight, carbon dioxide and water, where inorganic materials become organic. This process serves for the development and growth of the plant.how does a cell react in salt water
Desert plants are characterized by
Occasionally asexual reproduction can cause undesirable proliferation of an organism.
True
False
Answer: True
Asexual reproduction is a process in which single parent organism produces offsprings. This occur in simple organisms like bacteria, prokaryotes and fungi where a single cell breaks down into two or more numbers of daughter cells. The asexually reproduction can cause undersirable proliferation because the environment will not be able to sustain such a undesirable increase in number of offsprings and ultimately offsprings will die.
Which organelle supplies the cell with energy?
a. ribosome
b. cytoplasm
c. nucleus
d. mitochondrion?
Answer: Mitochondria.
Explanation:
Mitochondria is a double membrane bound organelle found in the cytoplasm of the cell. The main function of mitochondria is to produce energy currency ATP (adenosine triphosphate) which is used by every cell of the body to perform metabolic activities.
The energy production takes place by the process known as cellular respiration in the presence of oxygen by the breakdown of glucose.
The mitochondrion is the part of the cell that supplies energy. It is often referred to as the 'powerhouse of the cell' as it turns glucose into ATP, the cell's energy-carrying molecule via cellular respiration.
Explanation:The organelle that supplies the cell with energy is the mitochondrion. Among your options, ribosome is responsible for the synthesis of proteins, the cytoplasm hosts various cell processes and the nucleus contains the cell's genetic material. However, it's the mitochondrion, often described as the powerhouse of the cell, that provides the energy. It does this by breaking down glucose into ATP (adenosine triphosphate) through a process called cellular respiration. ATP is the molecule that carries energy within cells and is vital for cell functions.
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Biogeochemical cycles recycle water and natural elements throughout the biosphere to ensure that organisms do not run out of these substances. Thiobacillus denitrificans is a specialized species of bacteria that obtains its energy from carbon dioxide and inorganic compounds such as nitrogen in its environment. It is used in bioremediation of groundwater that contains excess nitrate. How does Thiobacillus denitrificans help bioremediate groundwater? nitrification denitrification nitrogen fixation decomposition
Final answer:
Thiobacillus denitrificans helps in the bioremediation of groundwater by performing denitrification, converting excess nitrates into nitrogen gas and reducing nitrate pollution.
Explanation:
Thiobacillus denitrificans plays a crucial role in the biogeochemical cycles by performing denitrification. This specialized species of bacteria helps in bioremediating groundwater by converting excess nitrates (NO₃⁻) into nitrogen gas (N₂), effectively reducing nitrate pollution. Denitrification is an essential process in the nitrogen cycle as it prevents the accumulation of nitrates which can lead to eutrophication of aquatic systems and groundwater contamination. Denitrification by Thiobacillus denitrificans demonstrates the beneficial application of bacteria in removing pollutants from the environment, supporting sustainable agriculture and ecosystems.