Answer:
1981
Explanation:
"A new era in space flight began on April 12, 1981, when Space Shuttle Columbia, or STS-1, soared into orbit from NASA's Kennedy Space Center in Florida."
which structures carry out cell movement?
i need help asap plz
Answer:
In addition to playing this structural role, the cytoskeleton is responsible for cell movements. These include not only the movements of entire cells, but also the internal transport of organelles and other structures
a Bryophyta is called amphibian plant .
Answer:Bryophytes are called amphibians of the plant kingdom because these plants though live in soil but they need water for sexual reproduction.
Explanation:
What is the end result of meiosis? four identical daughter cells four different daughter cells two identical daughter cells two different daughter cells
Answer:
B
Explanation:
The result of meiosis is four different daughter cells.
Meiosis and cell divisionMeiosis is a type of reductional cell division in which a parental cell divides twice to generate four daughter cells.
These daughter cells have half of the genetic material when compared to the parental cell.Meiosis is a cell division that generates gametes (geminal cells), which fuse during the process of fertilization.In conclusion, the result of meiosis is four different daughter cells.
Learn more about meiosis here:
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I am usually single stranded
DNA ONLY
RNA ONLY
BOTH DNA AND RNA
Answer:
BOTH DNA AND RNA
Explanation:
Answer:
hi you wasted one of the answers i had for my question so im returning the favor :)
Explanation:
How does nitrogen help plants to grow?
g Blood flows through a coronary artery that is partially blocked by deposits along the artery wall. Through which part of the artery is the flow speed largest
Answer: The question is incomplete and the options are not given but here are the options gotten from another websites.
A. Narrow part.
B. Wide part
C. The flow rate are the same in both part.
The correct option is C.
The flow rate are the same in both part.
Explanation:
The flow rate are the same in both because when there is partial blockage at the artery wall, the blood flow speed will reduce or stop, therefore the blockage will be a barrier or hindrance to free blood flow and therefore, both the narrow part and wide part will receive the same level of blood flow because of the blockage and this blockage result in restricted blood flow which in one way or the other hinder oxygen supply to the heart. The blockage deposits can cause a thickened artery wall and when blood flow is restricted it causes chest pain and if it stop it can cause heart attack. Blockage deposits can be as a result of artery wall damage.
Albert Schatz
Alexander Fleming
Alice Catherine Evans
Annie Chang
Antonie Van Leeuwenhoek
Carl Woese
Carlo Urbani
Carlos Juan Finlay
Carmen Sanchez
Charles Henry Nicolle
Claire Fraser
Dmitri Ivanowski
Edward Jenner
Elizabeth Bugie
Ferdinand J. Cohn
Fredrick Sanger
George Hirst
Giralamo Fracostoro
Gregory C.B. van Neil
Hans Christian J. Gram
Harold Amos
Hattie Alexander
Howard Ricketts
Ignaz Semmelweis
Ilya Ilich Metchnikoff
Jennifer Doudna
John Snow
John Tyndall
Joseph Lister
Julius Richard Petri
Kary Mullis
Kiyoshi Shiga
Louis Pasteur
Margret Pittman
Martha Chase
Martinus Beijerinck
Max Theiler
Paul Ehrlich
Rebecca Craighill Lancefield
Robert Gallo
Ronald Ross
Ruth Ella Moore
Salvador Luria
Selman Waksman
Sergei Winogradsky
Shibasaburo Kitasato
Stanley Cohen
Thomas Brock
Walter Reed
Wendell Stanley
William Augustus Hinton
Ernest Everett Just
in chronological order?
Answer:
Albert Schatz
Alexander Fleming
Alice Catherine Evans
Annie Chang
Antonie Van Leeuwenhoek
Carl Woese
Carlo Urbani
Carlos Juan Finlay
Carmen Sanchez
Charles Henry Nicolle
Claire Fraser
Dmitri Ivanowski
Edward Jenner
Elizabeth Bugie
Ferdinand J. Cohn
Fredrick Sanger
George Hirst
Giralamo Fracostoro
Gregory C.B. van Neil
Hans Christian J. Gram
Harold Amos
Hattie Alexander
Howard Ricketts
Ignaz Semmelweis
Ilya Ilich Metchnikoff
Jennifer Doudna
John Snow
John Tyndall
Joseph Lister
Julius Richard Petri
Kary Mullis
Kiyoshi Shiga
Louis Pasteur
Margret Pittman
Martha Chase
Martinus Beijerinck
Max Theiler
Paul Ehrlich
Rebecca Craighill Lancefield
Robert Gallo
Ronald Ross
Ruth Ella Moore
Salvador Luria
Selman Waksman
Sergei Winogradsky
Shibasaburo Kitasato
Stanley Cohen
Thomas Brock
Walter Reed
Wendell Stanley
William Augustus Hinton
Ernest Everett
What type of line connects the North and South Poles?
a. longitudinal
c. equatorial
b. latitudinal
d. tropical
Please select the best answer from the choices provided
ОА
ОВ
ОС
D
Help MrBeast and hundreds of thousands others plant trees and help prevent Global Warming!!
Listen Please, this is a very important cause, our Earth has been suffering Global Warming since the 18th Century and has also experienced Climate Change, we need YOUR help to help us plant trees for better oxygen, a better Earth, and to help Earth. Earth has been here since forever and has been great to us, now we come and destroy it, now is the time to help prevent global warming, if you are going to answer, please just type #teamtrees and something positive. PLEASE NO NEGATIVITY.
As always, stay safe and WAP (water and plant) a tree. Thank you!
Answer:
OMG I LOVE YOU SOMEONE NEEDED TO SAY THIS!! MUCH LOVE OMG CAN WE PLS BE FRIENDS ❤❤❤❤❤
Answer:
yep we will sure help!
Explanation:
LETS HELP MRBEAST GLOBAL WARMING!!!!!!!!!!!!!!!!!!!!!!!!!!
what is the difference between a heterogeneous mixture and a homogeneous mixture
Answer:
A heterogeneous mixture is a mixture where throughout the solution the composition is not uniform. Through definition, a single-phase consists of a pure substance or a homogeneous mixture. There are two or more phases of a heterogeneous mixture.
Homogeneous mixture is a mixture which has uniform composition throughout its mass.Example:-air,saline solution,most alloys and bitumen.Heterogeneous mixture is simply any mixture that is not uniform in composition.Example:-Sandy water,Orange juice with pull,cereal in milk.
The changes that occurred in Yellowstone National Park after all of its wolves
were killed showed that wolves are
A. harmful to the ecosystem
B. a keystone species in the ecosystem
C. a producer in the ecosystem
D. the only predators in the ecosystem
Liverworts, like the ones shown here, are nonvascular plants. They do not grow tall. Explain how the tissues in liverworts affect their size.
Guys I'm so confused. Please help!
Answer: The tissue structure of the liverworts restricts them to a type of environment that affects their size.
Explanation:
Nonvascular plants, also called the Bryophytes in Kingdom Plantae, are simple plants that grow in damp places on land and as the name implies, are non vascular plants( that is, they lack vascular tissues). There are three types of nonvascular plants which includes:
--> Mosses
--> liverworts and
--> hornworts.
Liverworts are restricted to a particular size through the type of tissue they have ( non vascular) because it predisposes them to lack conducting vessels like the phloem and xylem found in vascular plants which aids in conducting water and food to various parts of the plants. Also they do not grow tall like the vascular plants because they lack the qualities that will enable them do so, such as roots, stems and leaves.
Nonvascular plants are low-growing, reproduce with spores, and need a moist or damp environment.
Vertebrates can be classified in.
Explanation:
the middle one light blue
Answer:
The middle option
Explanation:
Vertebrates can be mammals, birds, reptiles, amphibians, and fish.
Most fish do have backbones.
Plz someone help me get these right ill give 50 points and brainlist if there ALL right!!
The diagram below represents some events that take place in plant cells.(IMAGE 2)
In which organelle would the above events most likely occur?
ribosome
mitochondrion
chloroplast
cytoplasm
Cellular respiration occurs in a series of steps. If pyruvate enters the mitochondrion, how much total energy can we assume will be produced?
2 molecules of ATP
14 molecules of oxygen
8 molecules of pyruvic acid
38 molecules of ATP
The graph below represents the absorption spectrum of chlorophyll.(IMAGE3)
The graph indicates that the energy used in photosynthesis is most likely obtained from which regions of the spectrum?
green and yellow
orange-red and violet-blue
yellow and orange-red
violet-blue and green
How do the number of chromosomes in an organism's egg cells compare with the number of chromosomes in her body (somatic) cells?
There are twice as many chromosomes in egg cells.
The number of chromosomes is the same in both.
The number of chromosomes depends on the size of the scorpion.
There are half as many chromosomes in egg cells.
PLS, Someone help me I need these right!!!Also the images are in order!!!
Answer:
1. Chloroplast
2. 38 molecules of ATP
3. orange-red and violet-blue
4. There are half as many chromosomes in egg cells.
Explanation:
1. According to the image 1 in this question, the process of PHOTOSYNTHESIS is being described. Photosynthesis is the process whereby plant cells synthesize their food (sugar) in the presence of sunlight. CO2 and water are used as reactants, while O2 gas is released as shown in the image as gas bubbles. This unique process of photosynthesis occurs in the CHLOROPLAST organelle.
2. Cellular respiration is the way through which living organisms obtain usable energy for metabolic activities. It is the process of breaking down food substances in a series of steps. Cellular respiration occurs in three major stages viz: glycolysis, Krebs cycle and oxidative phosphorylation. Glycolysis produces pyruvate, which may enter the mitochondria for the next stages in the presence of oxygen to yield 38 molecules of ATP.
3. Image 2 shows the absorption spectrum of chlorophyll pigment. As depicted in the image, the highest absorption spectrum of the photosynthetic pigment is at the "orange-red and violet-blue" wavelength. This connotes that the energy used in photosynthesis is most likely obtained from those regions of the spectrum.
4. Meiosis is the process through which gametes are formed. In the process of meiosis, each of the gametes will contain half of the chromosome number as the parent cell. This means that the egg cell (female gamete) produced by a female will contain half as many chromosomes than the somatic or body cell that undergoes the division.
Cellular respiration is the process through which food is broken down to yield energy. It takes place in every living entity.
The correct answers are:
1. Chloroplast
2. 38 molecules of ATP
3. orange-red and violet-blue
4. There are half as many chromosomes in egg cells.
The reasons for the following are:
1. In the first image, photosynthesis is shown. It is the process of producing food in the presence of light and carbon dioxide to give out oxygen. Carbon dioxide and water are reactants, which in the presence of sunlight react and yield oxygen as a byproduct. In the image, the oxygen is given out as bubbles.
2. Cellular respiration is the process occurring in every living organism. It is a process through which organisms obtain energy by breaking down food substances. Cellular respiration involves glycolysis, Kreb's cycle, and oxidative phosphorylation to yield energy in the form of ATP.
3. Image 2 represents the absorption spectra of the chlorophyll pigment. The photosynthetic pigment has the highest absorbance at the orange-red and violet-blue wavelength. This explains that energy required to carry out photosynthesis is obtained from this region of light.
4. Meiosis is a reduction division, in which the number of chromosomes is halved from the parent to daughter cells. The parental gametes consist of half the number of chromosomes, which then fuse to form a diploid zygote. The somatic cells undergo mitotic division, in which the number of chromosomes in the parent cells is similar to the daughter cells.
To know more about respiration, refer to the following link:
https://brainly.com/question/23126016
3
Based on the thin layer of sediment on his flooded farm,
James Hutton concluded that strata:
A Are made of large rocks
B
Settle in vertical layers
С
Are formed by catastrophes like floods and earthquakes
D
Take many thousands of years to form
Answer:
c
Explanation:
know it
According to Jean piaget most preschool children are in the ______ stage of mortal development ?
Is sickle cell gene mutation positive, negative, or neutral?
The majority of mutations have neither negative nor positive effects on the organism in which they occur. These mutations are called neutral mutations. Examples include silent point mutations. They are neutral because they do not change the amino acids in the proteins they encode.
Which level of organization is not found in every protein
Answer:
I Think...
Explanation:
Each protein has a particular structure necessary to bind with a high degree of ... Others, like titin (a protein found in muscle), are very large Organization of Protein Structure ... This single hydroxyl orientation difference does not allow galactose to bind to hexokinase and thus hexokinase exhibits specificity of binding.
what is meant by an atp cycle and why is it an important frequent event in cells? how does this involve adp
Answer:
Please find the explanation to this question below
Explanation:
The ATP cycle is the series of reactions involving glycolysis, Krebs cycle and oxidative phosphorylation that produces/synthesizes ATP in living cells. These processes collectively is called CELLULAR RESPIRATION. Glycolysis produces 2ATP molecules, Krebs cycle produces 2ATP while the electron transport chain (oxidative phosphorylation) produces 34ATP molecules.
This cycle of ATP as explained above is an important frequent event in cells because all organisms need energy to carry out their metabolic activities. ATP is the energy-carrying molecule that stores and releases energy for use by the cells, hence, it needs to be produced on a frequent basis.
ATP can be likened to a charged battery ready to release its stored energy. The energy is stored in the phosphate bonds that makes up its structure. When ATP releases its energy, it becomes ADP (Adenosine diphosphate). However, ADP is a reactant in the ATP cycle, which is phosphorylated with an inorganic phosphate (Pi) and catalyzes by ATP synthase to form ATP.
9) A young plant will develop from the ___ inside the seed.
petiole
zygote
anther
axil
different categories of cells and give one example in each catergory
Cells are of two types: eukaryotic, which contain a nucleus, and prokaryotic, which do not. Prokaryotes are single-celled organisms, while eukaryotes can be either single-celled or multicellular.
Fight or flight is a response to which kind of stimulus?
the external stimulus of heat
the internal stimulus of hunger
the external stimulus of danger
the internal stimulus of illness
Answer:
the external stimulas of danger
Explanation:
The flight or flight is the natrual intinct when in a dangerous situation, and is everyones go to response
Answer:
c
Explanation:
the function of a cell wall
Answer:
Shhhhhhhhshehrhh
Explanation:
Jjshhhhhhh
can somebody do 4 and 5 for me
Answer:
4. According to what is observed in the diagram, the maltose (substrate) binds to the maltase (enzyme) to obtain glucose molecules (product), in a process of hydrolysis of the maltose.
5. Three factors that can affect intestinal maltose activity - slowing it down or stopping it - are temperature, pH and substrate depletion.
Explanation:
4. Enzymes, such as maltase, have the function of making a reaction faster and decreasing the activation energy. Maltase is responsible for breaking down a maltose molecule, a dimer, into two glucose monomers, which is a hydrolysis reaction of the bonds that hold glucose molecules together.
5. There are several factors that can cause the decrease or cessation of the activity of an enzyme. Enzymes are activated when substrate is available and work best under ideal temperature and pH conditions. When there are alterations of these factors, the enzyme will reduce or stop the reaction in which it intervenes.
pH: when the pH increases or decreases it produces a decrease in the speed of reaction that catalyzes an enzyme. Very high or low pH levels can denature the enzyme and make the expected reaction not occur. Temperature: like pH, changes in temperature can slow or stop maltase activity..Substrate availability: It is a fact that when the specific substrate of an enzyme becomes depleted, the rate of reaction slows down, stopping when no substrate is available.how many holes are in the human body?
Answer:
I think there are 8 holes in a male and 9 holes in a female. Not including pores.
Explanation:
Which of the following is true about a change from a solid to a liquid?
Answer:
ice
Explanation:
bc ice changes a solid to a liquid when it melts
What are some examples of the ecological populations?
Answer:
some examples are in a lake, all the stray cats in a city, or all the evergreen trees in a forest. Remember, limiting factors can affect the carrying capacity. Different limiting factors, such as natural disasters or competition, can cause a population size to decrease!
How are scientists using the lotus leaf as inspiration to solve problems?
The type of membrane protein that gives cells specific identity are called:
Markers
Channels
Receptors
Pumps
Aquaporins
Answer:
Membrane markers allow cells to recognize one another, which is vital for cellular signaling processes that influence tissue and organ formation during early development. This marking function also plays a later role in the “self”-versus-“non-self” distinction of the immune response.
Explanation:
Which pathway crosses over in the medulla?
a. Lateral spinothalamic pathway
b. Posterior column pathway
c. Anterior spinothalamic pathway
d. Spinocerebellar pathway
Answer:
B - Posterior column pathway
The only spinal column that does not cross over as it enters the spinal cord is the posterior column. Instead, the medulla oblongata is where the posterior column transitions. Therefore, option (B) is correct.
What is Posterior column pathway?The dorsal column–medial lemniscus pathway (DCML) is a sensory pathway of the central nervous system that conveys sensations of fine touch, vibration, two-point discrimination, and proprioception (position) from the skin and joints. It is also known as the posterior column–medial lemniscus pathway, or PCML.
The only column other than the posterior one to enter the spinal cord without making a crossing is the posterior column. In its place, the posterior column makes a U-turn in the medulla oblongata.
Therefore, option (B) is the correct option.
Learn more about Posterior column pathway, here:
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