The four phases of cell cycles are:
(G1) gap stage: in this stage, the cell increase in size.(S) synthesis stage: in this stage, the cell copy its DNA.(G) gap 2 stage: in this stage, the cell starts to divide.Mitosis or M stage: where the cell divided into an identical daughter cell.What is the cell cycle?The cell cycle is a process of which completed in four stages. The process starts from the growth of the cell to the division of the cell into an identical daughter cell.
The four stages of the cell, are complete with creating another new cell. The stage of mitosis is also a multistep process after the three phases, which leads to the multiplication of the cell.
The steps of mitosis are:
Prophase: the cell starts for division, nucleus wall breaks down.
Metaphase: spindle fiber starts to form.
Anaphase: the sister chromatids begin to separate.
Telophase: the division is almost done in the last step.
Thus, there are four stages of cell cycles which are in order following:
(G1) gap stage, (S) synthesis stage(G), gap 2 stage, and Mitosis, or M stage: also known as mitosis, is the division of the cell into identical daughter cells.
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Which of the following invented the polymerase chain reaction (PCR) that allowed scientists to enlarge and study genetic material?
Charles Darwin
Kary Mullis
Marshall Nirenburg
Nettie Stevens
Answer:
Kary Mullis
Explanation:
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Which describes a constant in an experiment?
A.
the variable changed by the experimenter
B.
the quantity that must remain the same
C.
the variable that changes in response to the experiment
D.
the statement that is worded to test the experiment
TRUE OR FALSE: Every time energy is transferred between organisms in a food web, some of the energy is lost as heat.
How many satellites does Mars have?
Answer:Grad point answer 2
Explanation:
What are the parts animal cell?
When walking through the woods Adam and Alise saw many mushroom-like organisms growing out of logs that were laying on the ground. These logs were pieces of trees that had either completely fallen down or had broken off of the larger tree. What did Adam and Alise really see?
A. The mushrooms were only anchored to the dead logs and were undergoing photosynthesis.
B. The mushrooms were helping the trees to stay alive.
C. The mushrooms were decomposing the dead tree logs.
D. The mushrooms and tree logs were exchanging genetic material.
Answer: Option C
Explanation:
The mushrooms belongs to the family of fungus. These are natural decomposers that helps in cleaning of the environment. They feed on the dead and decaying organic matter.
Feeding on the dead and decaying organic matter provides food to mushroom and helps in decomposing the matter and adding nutrients back into the soil.
hence, Adam and Alise saw that mushrooms were decomposing the tree log.
which of the following statements about colonial organisms is correct
the giant land tortoises of the galapagos islands and sequoias of California, have among the longest life spans of any organisms this indicates that they likely employ a stategry of
Giant land tortoises of the Galapagos Islands have long necks as a result of natural selection, giving them a survival advantage in environments where food is scarce and positioned higher. Over time, long-necked individuals are more likely to survive and reproduce, passing on this advantageous trait.
The giant land tortoises of the Galapagos Islands and the sequoias of California possess some of the longest lifespans of any organisms on Earth. This indicates that they likely employ a strategy of natural selection, where traits beneficial for survival in their environments are passed down through generations. For the Galapagos tortoises, a notable example is the variation in neck length. Tortoises with longer necks were 'selected' in environments where food sources were higher off the ground. During droughts or in areas with sparse vegetation, these tortoises could access food that short-necked tortoises could not, thus having a better chance of survival and reproduction. Over time, the trait of having a long neck would become predominant in the population due to this selective advantage.
what are the special properties of water
20 POINTS!!! MORE THAN ONE ANSWER!!!!
Why are invasive species considered a threat to native wildlife?
They can breed and spread quickly.
They consume native species’ food supply.
They evolve, and native species don’t.
They all have higher genetic diversity than native species.
They don’t need resources from the environment as native species do.
They can breed and spread quickly.
They consume native species’ food supply.
Invasive species disrupt the ecosystem.What are invasive species?Invasive species, also called introduced species, alien species, or exotic species, any nonnative species that significantly modifies or disrupts the ecosystems it colonizes. Such species may arrive in new areas through natural migration, but they are often introduced by the activities of other species.To know more about species here
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Water is a _____ molecule.ionic covalent polar covalent reversible
Answer:
polar covalent
Explanation:
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Gamma rays are used
A. in microwave ovens.
B. to treat cancer, but they can also cause cancer.
C. in cell phone transmitters.
How can plasmid be described?
A. a small organelle
B. a small loop of DNA
C. a prokaryotic ribosome
D. a prokaryotic membrane
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what type of noise does a fox make? or what noise do deer make?
Foxes make various noises like howls, screams, and squeaks, used for communication purposes. Deer also communicate through sounds like bleats, grunts, and barks, put to use based on the situation or interaction.
Explanation:The sounds that animals make vary greatly. For example, foxes produce a range of noises that include howls, barks, screams and squeaks, often described as a sound between a bark and a scream. Foxes use these diverse sounds for communication, including attracting a mate or signaling danger.
On the other hand, deer make a different variety of sounds, including bleats, grunts, and barks. A doe (female deer) often uses a gentle, drawn-out bleat to call her fawns (babies) to her side. A buck (male deer) might use a strong grunt or a light spar to communicate with other deer.
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How many calories are in carne asada nachos from Albertos?
Which produces the sediments that ultimately lead to soil formation?
A.
rivers
B.
plants
C.
weathering
D.
rainfall
The human body works constantly to maintain a stable, internal environment. This environment is called
A)equilibrium.
B)fitness.
C)health.
D)homeostasis.
compare and contrast the traditional classification and the modern classification (cladograms)
In sexual reproduction, offspring are genetically different from the parents. This is because
combined genes are received from both parents.
Offspring are genetically different from their parents in sexual reproduction due to crossing-over, independent assortment during meiosis, and the random union of gametes during fertilization, leading to genetic variation.
Explanation:In sexual reproduction, offspring are genetically different from the parents due to several key mechanisms. Genetic variation is the hallmark of sexual reproduction, which results in offspring with unique genetic makeups. This genetic diversity arises from processes like crossing-over and independent assortment during meiosis, along with the random union of gametes during fertilization. This diversity is crucial for the survival of species as it allows them to better adapt to changing environments and avoid the pitfalls of inbreeding.
Which system recieves and sends electrical signals through out the body?
a. muscular
c. nervous
b. skeletal
d. cardiac
The nervous system receives and sends electrical signals throughout the body.
The nervous system is the part of an animal that contains several nerves and specialized cells called neurons which receives and sends electric signals between various parts of the body. The nervous system is composed of the central nervous system (brain and spinal cord) and the peripheral nervous system (somatic and the autonomic nervous systems).
According to famed linguist Noam Chomsky, humans have an innate ability to understand and produce language through a device he called ____
Which is not true of lipids?
Answer:
Explanation:
They form structural parts of cell membranes.
The carry fat-soluble vitamins to cells.
They supply cells with energy.
They supply cells with nitrogen.
The chaparral biome has little biodiversity and is home to only a few well-adapted species.
Please select the best answer from the choices provided
T
F
The statement "The chaparral biome has little biodiversity and is home to only a few well-adapted species" is false.
What is Chaparral biome?Some Chaparral ecosystems (those with a low scrubby brush) are very similar to the desert scrub biome, but Chaparral occurs primarily on the coast.
Even though it appears to be true, it is not because of the stiff and dry environment of the desert biome. The Chaparral biome, on the other hand, receives more rainfall, which explains why there are so many distinct plant and tree species, as well as animals.
Shrubland biomes include the chaparral and savanna biomes. A biome is an ecological environment made up of numerous ecosystems that interact, exchange information, and are sometimes regarded as interdependent.
Therefore, the statement is false.
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Adenosine triphosphate, or ATP, is primarily used as _______ in living organisms.
Adenosine triphosphate, or ATP, is primarily used as a source of energy in living organisms.
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Arrange the following five events in an order that explains the mass flow of materials in the phloem.
1. Water diffuses into the sieve tubes.
2. Leaf cells produce sugar by photosynthesis.
3. Solutes are actively transported into sieve tubes.
4. Sugar is transported from cell to cell in the leaf.
5. Sugar moves down the stem.
A) 2, 1, 4, 3, 5
B) 1, 2, 3, 4, 5
C) 2, 4, 3, 1, 5
D) 4, 2, 1, 3, 5
E) 2, 4, 1, 3, 5
Which describes step three of a muscle contraction?
what is the chemical energy in the cell called
How does carbon in sediments reach the atmosphere
do puffer fish have vestigial structures? what are they?
Northern lights or auroras can be seen within the _____ sub-layer.
A.ozonosphere
B.ionosphere
C.exosphere
D.troposphere