Answer:
Perhaps the most amazing thing about mitosis is its precision, a feature that has intrigued biologists since Walther Flemming first described chromosomes in the late 1800s (Paweletz, 2001). Although Flemming was able to correctly deduce the sequence of events in mitosis, this sequence could not be experimentally verified for several decades, until advances in light microscopy made it possible to observe chromosome movements in living cells. Researchers now know that mitosis is a highly regulated process involving hundreds of different cellular proteins. The dynamic nature of mitosis is best appreciated when this process is viewed in living cells.
Explanation:
Influenza (the flu) is caused by a virus that attacks the respiratory system. Which type of gene is most likely to be widely expressed in the body of someone who contracts the influenza virus?
the gene that controls the production of stem cells
the gene that controls the production of skin cells
the gene that controls the production of red blood cells
the gene that controls the production of white blood cells
Answer:
D is the correct option.
Explanation:
all my answers got deleted.
Answer: THE ANSWRER IS D
Explanation: I TOOK THE TEST
Help please I have no time
The process where severe droughts cause some lands to become deserts is called __(blank)__ pls help and ty! :))
Answer:
Desertification
Hope this helps!
Which of these best describes Earth’s core?
A. Most dense layer, consists of the outer and inner parts.
B. Thinnest under the oceans and thickest under continents.
C. Middle layers, density increases with depth and pressure increases.
D. Least dense layer overall, consists of two layers of different thickness.
Answer: A.
Explanation:
There core, or inner layer, is the most dense due to its magnetic pole, not to mention, the core is comprised of multiple molten materials, heated so hot, tht it practically exist between two states of matter simultaneously.
Answer:
A. Most dense layer, consists of the outer and inner parts
According to Figure 2–6, which enzyme would you expect to find in a bacterium growing in a hot spring?
It's a hot summer day & you decide to mow the lawn, Mowing the lawn will be an intense activity, but your lawn is small & will take you only 10
minutes to mow. Before mowing you want to have a snack,
1. Name the 4 biomolecules that are found in different foods:
Answer:
Carbohydrates, proteins, lipids and nucleic acids.
Explanation:
Biomolecules are organic and are carbon containing and are of four types which are carbohydrates, proteins, lipids and nucleic acids.
Carbohydrates are part of our major diets and are found in grains, fruits and vegetables and so on.
Carbohydrates are energy producing food through glucose.
Lipids contain both fat and oil and they are hydrocarbon and non polar molecules that don't dissolve in water. They provide energy, insulation in the environment and are major constituent of plasma.
Proteins are organic molecules found in meat, milk, beans, cheese e.t.c.
They are body building food or serve as building blocks.
They are enzymes and hormones which are involved in body mechanisms.
Nucleic acids are composed of deoxyribonucleic acid(DNA) and ribonucleic acids. They are the genetic constituent of living organisms and they carry the genetic information.
Sexual reproduction in animals depends on the production of gametes. Which of these processes produces gametes in animals?
Answer options:
Mitosis Fertilization Meiosis Binary FissionAnswer:
Meiosis
Explanation:
Meiosis is a specialized type of cell division that produces gametes. Diploid parent cells, after DNA replication, undergo two rounds of meiosis to produce four haploid gametes.
Mitosis produces daughter cells for growth and repair of organisms. It produces two identical daughter cells from a parent cells.
Fertilization is when two gametes fuse to create a zygote.
Binary fission is when bacteria undergo asexual reproduction to produce two identical daughter cells.
Option C is correct. the gametes in animals are produced by Meiosis.
Meiosis:
It is a type of cell division in which a cell divide to form four Haploid daughter cells.
It usually occurs in the germ cells to produce gametes.Meiosis is completed in 2 phases.Gametes fertilise to form zygotes.In binary fission is cells divide to form 2 nearly identical cells. In Mitosis, cells divide to form two identical diploid cells.Hence, Options A, B, and D are incorrect.
Therefore, option C is correct. the gametes in animals are produced by Meiosis.
To know more about Meiosis,
https://brainly.com/question/12327654
1. results in no motion of the object because forces are equal and in opposite directions
A. blanced forces
B. Unblanced forces
Answer:
Balanced Forces
Explanation:
When the forces acting on an object have equal strength and act in opposite directions, they are balanced.When the forces acting on an object are unbalanced, they do not cancel out one another.
Si durante la division de las celulas de la raiz de una planta se aplica una sustancia x que destruye el complwjo de golgi de estas celulas¿cual sera el efecto esperado en dicho tejido
Answer:
cada célula tendrá dos núcleos
Explanation:
El complejo o aparato de Golgi es un organela compuesta por un grupo de membranas apliladas una sobre la otra formando una serie de sacos aplanados. El complejo de Golgi tiene diversas funciones: maduración, modificación (glicosilación), transporte y secreción de proteínas. En células vegetales, el aparato de Golgi sintetiza vesículas que forman parte del tabique telofásico el cual sirve para dividir el citoplasma de células vegetales durante la citocinesis. En consecuencia, si se eliminara esta organela, el tabique telofásico no se formaría y las células resultantes estarán compuestas por dos núcleos.
Is our current model of the solar system geocentric or heliocentric?
Answer:
HELIOCENTRIC
Explanation:
Answer:
heliocentric
Explanation:
A student is examining the liquid mercury inside a thermometer. If the liquid is composed of only mercury atoms, what can the student conclude?
A :the liquid is an impure substance because it is in a liquid state.
The liquid is a pure substance because it is made up of elements
The liquid is an impure substance because it is inside a thermometer.
The liquid is a pure substance because it is made up of mixtures.
Answer:
b
Explanation:
DID IT
Mercury is used in thermometers to estimate temperatures. Liquid mercury composed of Hg atoms is a pure substance that consists of single elements. Thus, option B is correct.
What are pure substances?Pure substances are chemicals that are matter and have been known to have distinct chemical properties because of their constant and definite composition. The physical methods of separation can not be used to separate the pure substances.
The liquid mercury is a pure substance as it has been composed of only one type of elemental atom Hg. All of its composition has been carrying the Hg atoms uniformly that possess and exhibit the same chemical and physical characteristics.
Therefore, option B. the liquid mercury is a pure substance as it is made of the same type of element.
Learn more about pure substances, here:
https://brainly.com/question/18634105
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Which of the following processes describes a chemical change?
Answer: The breakdown of particles of food by acid in the stomach
Explanation: Just ‘cause I think it’s right
Explain how Carbon is passed from photosynthesis to cellular respiration then back.
The main purpose of photosynthesis is to convert radiant energy from the sun into chemical energy that can be used for food. Cellular respiration is the process that occurs in the mitochondria of organisms (animals and plants) to break down sugar in the presence of oxygen to release energy in the form of ATP.
https://orise.orau.gov/resources/k12/documents/lesson-plans/intro-to-photosynthesis.pdf
Which statement describes a feature of an equal-area projection?
Different types exist.
Longitude lines are straight.
Latitude lines meet at the poles.
Land area is less accurate than on a Mercator projection.
Answer:
the answer is A different types exist. hope you have an amazing day.
Explanation:
Answer: bro up top is right -w-
Explanation: here's some proof for yah
How does the spread of an airborne pathogen compare to the spread of foodborne and person-to-person pathogens
Answer:
You must come in contact with the infected air. It spreads slower, and more than one person is usually affected at the same time.
Explanation:
What are the correct answers?
Answer:
2 is 700 because it wants the total distance so we r gonna add 400+300=700
3 is change in velocity
Explanation:
A researcher is viewing a cell that has cell walls. Which question would BEST help the researcher to narrow down the taxonomic group to which the cell belongs ?
Answer:
Does it have a nucleus?
Explanation:
Bacteria and Archaea have cell walls but no nuclei
Plant cells (Eukarya) have cell walls and a nucleus.
But remember not all eukaryotes have cell walls
85 °F equals how many °C?
A:20.41
B:20.84
C:21.34
D:41.10.
E:29.44
Answer:
The answer is E
Explanation:
Hope this helps
Answer:
E:29.44
Explanation:
The answer is E
HELPPP PLEASE ASAP!!!!!! Which of the following best describes positive feedback?
A) It causes an effector to signal the control center, which creates the stimulus to make a response.
B) It amplifies a change in a given condition by signaling for a response that increases that change.
C) It produces a response by increasing the set point in the organism’s metabolism.
D) It promotes decreases, rather than increases, in an organism’s metabolism.
Answer:
I think it was b
Explanation:
why do i think this because i have seen it everywhere im about to take the test and i will commet before someone else gets it wrong too.
FOR THE SECOND TIME-----Ughhh can someone answer this dang biology question I cant!!!!! I will mark you brainliest!!Referring to the graph, what phases together would account for approximately 25% of the time spent from a cell in the cell cycle?
A) M phase and S phase
B) S phase and M phase
C) G1 phase and M phase
D) G2 phase and M phase
Answer:
D. G2 phase and M phase
Explanation:
If we are looking for what takes up 25% of the graph, that would be the last option. If you look at G1, it takes up about 50%. So, G1 phase and M phase would take up more than that, and we want 25% not 50+. The M phase and S phase would take up about a third, so no. The G2 phase and M phase takes up roughly 25% or, it's the closest to this.
Which organelles would a student include when constructing a model of a plant cell that would differentiate it from an animal cell?
explain how trees can grow in a
boreal forest,
Answer:
In the boreal forest the ground thaws more and does not have a permafrost layer. This allows trees to take root. Compose an argument for categorizing mountains and polar regions as terrestrial biomes. Mountains and polar regions have these characteristics and provide land on which certain plants and animals can live.
Explanation:
Answer:
Photosynthesis
Explanation:
By using photosynthesis
Which organisms inhaled CO2 and exhaled 02 to 100s of millions of years, increasing the amount of O2 in the atmosphere?
Answer:
Plants
Explanation:
Plants 'inhale' CO2 and 'exhale' O2.
Which statements describe what happens when enzymes are added to a chemical reaction?
Select all that apply.
- The chemical reaction is sped up.
- The chemical reaction is stopped.
- The activation energy is lowered.
- The enzymes are used up.
Answer:
The chemical reaction is sped up.
The activation energy is lowered.
Explanation:
When enzymes are added to a chemical reaction, they lower the activation energy needed in the reaction.
In return, that also speeds up the chemical reaction, since less energy is needed to start it.
Enzymes do not stop chemical reactions, and enzymes can also be reused, so they are not used up.
So, the first and third statements are correct.
Answer:
The other person is right so you can give him brainly.
Explanation:
complementary strand of MRNA
Answer:
The upper strand of DNA is the "mRNA-like" strand. The lower strand is the strand that is complementary to the mRNA. The -35 region (TTGACA) and -10 region (TATATT) of the promoter sequence and the transcriptional start site (the A) is indicated on the coding strand.
Answer:
DNA -> mRNA -> tRNA -> Amino Acids
Explanation:
PLEASE HELP ASAP!!! GEOTROPISM
Answer:
Negative Geotropism
Explanation:
Positive Geotropism means growth of the plants towards the Gravitational force. e.g.It means When a plant's root grows towards Gravitational force . ... Negative Geotropism means growth of the plant against the Gravitational force. e.g. When a plant's steam grows towards sunlight.
Hope this helped!
~PumpkinSpice1
☼♥☼♥☼♥☼♥☼♥
explain the difference between an
autotroph and an heterotroph.
Answer:
The answer will be listed below.
Explanation:
Autotroph and heterotroph are two different terms. Autotrophs are producers, such as plants and other organisms that can produce their own food. Heterotrophs are consumers who consumes producers or other consumers to get their food. Examples include animals, people, and those who consume other things for energy.
pls help me plsssssss
Why do heart cells have different characteristics than skin cells???
Heart cells have different DNA than skin cells.
Heart cells reproduce by mitosis.
Heart cells express different genes than skin cells.
Heart cells reproduce by cell differentiation.
Answer:
Heart cells express different genes than skin cells
Explanation:
Cells contain instructions for their gene expression within stretches of DNA called genes, which is expressed and translated into protein.
Somatic cells are cells which contain the organism's chromosome number. They contain the entire karotype- and divide/ replicate through mitosis. In several stages of mitosis, DNA becomes condensed, is unwound and replicated, then packaged into two identical daughter cells.
All somatic cells start out undifferentiated (as stem cells). AFter the process of differentiation, they undergo changes in gene expression to become specific cell types, through processes like methylation and gain maturity.
How do ocean currents affect weather in areas close to shore?
Answer:
Warm and cold ocean currents can affect the climate of an area along the coast if the winds blow in from the ocean. Warm ocean currents heat the air above the water and carry the warm air to the land, increasing the temperature of the coastal region.
Explanation:
hope it helps
Answer:
Warm and cold ocean currents can affect the climate of an area along the coast if the winds blow in from the ocean. Warm ocean currents heat the air above the water and carry the warm air to the land.
Explanation:
Hope this helped :)