Answer:
F. Membrane-bound organelles
Explanation:
Prokaryotic cells lack a nucleus and membrane-bound structures. Eukaryotic cells have a nucleus and membrane-bound structures called organelles.
How do scientist know that the core is made of iron and nickel
A=Scientists have gathered samples of the core
B=Pictures of the core have been taken from satelites
C=The core produces a lot of seismic waves
D=The core is dense and produces the magnetitteid. HELP ASAP WILL MARK BRAINLY
Answer:c
Explanation:Apex
Where are the heart and great vessels located in the human body?.
Answer:
From the center to the left of the thorax, the heart and major vessels are placed in the mediastinum between the lungs and above the diaphragm.
Explanation: Answer above
Where does the water cycle start?
The plant roots being underground respire by using which mechanism?
(b) The amount of CO2 be the lowest in which one and why?
Answer:
hi my self Avantika
Explanation:
can we be friends
Describe the function of each organelle.
Cytoplasm
Cell wall
Chloroplast
Centrioles
Answer: Cytoplasm: Is a semi- fluid substance. It is present between the cell membrane and the nucleus. Water is the main component of the cytoplasm. Cytoplasm dissolve in it the molecules released by organelles present in it. It acts as a reservoir for dissolution of molecules not required instantly by the cell to conduct any metabolic activity except lipids. It can dissolve proteins, glucose etc. Pathways like glycolysis takes place in cytoplasm.
Chloroplasts: It is a cell organelle found in plants. The function of chloroplast is to carry out photosynthesis in plants. It uses pigment which traps the sunlight. It converts the sunlight energy into chemical energy in the form of ATP and NADPH.
Cell wall: It is the semi- permeable layer outside the plant, fungi, algae and bacteria. It's main function is to provide structural support to the cell. It facilitates the import and outport of molecules in and of the cell necessary for cell function.
Centrioles: They are the cell organelles which are visible during the cell division.The centrioles are the sites where the spindle fibers originate. These spindle fibers gets attach with the each membrane of the chromosome pair and facilitate their separation during cell division.
Explanation:
why we need to study biology
Answer:
you learn to make more informed decisions about their own health and about significant biological issues such as genetically modified crops, the use of antibiotics, and the eradication of invasive species
If we study biology, we can understand how plants and organisms interact with each other, what are their traits, evolutionary ancestors, etc. Not to mention, it helps us be safe from dangerous animals, and allows us to understand how to prevent bacteria and viruses from entering our body.......
Thankyou :)Firstly, plant cells have a cell wall that surrounds the cell membrane, whereas animal cells do not. ... These additional organelles allow plants to form an upright structure without the need for a skeleton (cell wall and central vacuole), and also allow them to produce their own food through photosynthesis (chloroplasts).
Answer:
Explanation:
This question appears incomplete. However, one of the main differences (in organelles) between plants and animal cells is the absence of cell wall and chloroplast in animal cells while both organelles are present in plant cells. The cell wall is outside of the cell membrane. The cell wall provides rigidity and support to the plant cell while the chloroplast is the cellular "machinery" for photosynthesis. The chloroplast contains the green pigment called chlorophyll which provides green plants with there colour and assist the plants in absorbing/capturing of sunlight/energy for the purpose of photosynthesis (self production of food by green plants).
all the characteristics of a prokaryotic cell
Answer:
Explanation:
Prokaryotes lack an organized nucleus and other membrane-bound organelles.
Prokaryotic DNA is found in a central part of the cell called the nucleoid.
The cell wall of a prokaryote acts as an extra layer of protection, helps maintain cell shape, and prevents dehydration.
After a power stroke, the myosin head must detach from actin before another power stroke can occur. What causes cross bridge detachment?.
A new molecule of ATP attaches to the myosin head, causing the cross-bridge to detach is the right answer.
What is cross bridge detachment?During detachment cycle, the cross-bridge head is thought to undergo a rotation and so pull the actin filament relative to the myosin so we can conclude that a new molecule of ATP attaches to the myosin head, causing the cross-bridge to detach.
Learn more about stroke here: https://brainly.com/question/26482925
Describe and explain the three basic cyclic reasons why the temperature of the Earth has fluctuated over time (Milankovitch Cycles). Please make sure to use complete sentences and proper grammar.
PLEASE HELPPPPP
The three basic cyclic reasons why the temperature of the Earth has fluctuated over time are Eccentricity, Obliquity and Precession.
The Milankovitch CyclesThe Milankovitch Cycles are defined as the cyclical movement related to the Earth's orbit around the sun. These cycles cause variations in the amount of solar energy reaching the Earth.
Milankovitch Cycle was developed by the Serbian mathematician called Mulutin Milankovitch.
The climatic effects of the Milankovitch Cycles include:
Eccentricity: This is defined as the shape of Earth's orbit. This cycle is the reason why the seasons are slightly different in length.Obliquity: This is defined as the angle that Earth's axis is tilted with respect to Earth's orbital plane. The greater Earth’s axial tilt angle, the more extreme our seasons are.Precession: This is defined as the direction that Earth's spin axis is pointed. Axial precession makes seasonal contrasts more extreme in one hemisphere and less extreme in the other.Learn more about earth's temperature here:
https://brainly.com/question/18230384
A root emerges from a seed because of the force of
Answer:
water against the seed coat.
Explanation:
Where do plants get the carbon needed to make glucose molecules during the process of photosynthesis?
a.) from the ground
b.) from the air
c.) from the water
d.) from the sun
Answer:
b.) from the air
Explanation:
During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil. Within the plant cell, the water is oxidized, meaning it loses electrons, while the carbon dioxide is reduced, meaning it gains electrons. This transforms the water into oxygen and the carbon dioxide into glucose.
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name and define the states of energy
Answer:
There are two states of energy: potential energy and kinetic energy.
Potential energy is stored energy – energy that is ready to go. Potential energy can be used in combination with other terms like “gravitational potential energy,” which is the energy an object has due to height in comparison to a lower elevation.
Kinetic energy, simply put, is energy something has because of its motion.
Explanation:
Molten rock above ground is called
A) magma
B) metamorphic
C) sedimentary
D) lava
Answer:
D
Explanation:
Lava trust me
Mindful eating includes which behavior?
feeling the textures of your food
eating while watching television
O photographing every meal that you eat
O recording every calorie that you consume
Answer:
A, "feeling the textures of your food."
Explanation:
While every option does appear mindful, only A is the correct answer. The true definition of mindful eating is that you are paying undivided attention to your food and how it makes you feel. This includes the aroma, textures, and your sensual awareness. This does not involve computing calories or partaking in obsessive behaviors. Watching television while you eat would be distracting you from the experience.
which structures are found only in the animal cell?
Answer:
Centrioles
Explanation:
Centrioles: Animal cells contain organelles known as centrioles, which are not present in plant cells.
Answer:
Animal cells each have a centrosome and lysosomes, whereas plant cells do not. Plant cells have a cell wall, chloroplasts and other specialized plastids, and a large central vacuole, whereas animal cells do not
Explanation:
:)Hope this help you out friend:)Which of the following is not a source of groundwater pollution? a. Landfills b. Septic tanks c. Smoke stacks d. Fertilizer Please select the best answer from the choices provided A B C D.
Which of the following statements is true? *
1. Autotrophs take in food from outside themselves.
2. Consumers are autotrophs.
3. Heterotrophs produce their own food.
4. Consumers are heterotrophs.
To construct linkage maps, scientists estimate the distance between genes on the same chromosome based on the ______, as indicated by the percentage of recombinant offspring.
To construct linkage maps, scientists estimate the distance between genes on the same chromosome based on the crossover frequency. It is also called recombination.
What is a crossover?Crossover or recombination is the interchange of genetic material between non-sister chromatids during meiosis.
In genetics, this rate of recombination is useful to develop linkage maps (i.e., genetic maps).
These genetic maps are not equal to distance maps, which are constructed based on nucleotide distances.
Learn more about genetic maps here:
https://brainly.com/question/13769
1. Explain why most cells are, of necessity, very small.
Answer:
they need to divide when they grow beyond a certain limit.
Explanation:
they may not have not enough material to cross the membrane quick enough which will increase cellular volume. when that happens the cell must divide into smaller cells with favorable surface area or volume ratios or crease in function. hoped that helped. :)
Please Help!
Q.1. Describe and explain what can be seen by using the Parkes Radio Telescope, affectionately known as “The Dish.” Be sure to explain what synchrotron radiation is.
Q.2. Why is the Murchison Radio Observatory such an ideal place to build radio telescopes? Explain.
Q.3. When Walker decides that she wants to explore beyond the Milky Way, what does she find?
Q.4. How many radio galaxies can be seen in the image that Walker shares? Describe these galaxies and what they look like in the image?
Q.5. After learning about Walker and her love of and exploration of galaxies, what questions do you still have? What do you want to know more about?
Answer:
1. The Parkes radio telescope is a gigantic measuring instrument, used to examine a wide range of radio energies from our galaxy and other parts of the universe.
2. The remote location of the MRO ensures a radio quiet operating environment but makes access to basic infrastructure like roads and power a challenge.
3. whistling plasma ducts in the Earth's ionosphere and some of the youngest and weirdest radio galaxies ever found.
4. only around 800 giants have been found.
5.
Explanation:
sorry it took long to answer
please make this the
Dian Fossey had no experience with primates or even how to conduct field studies and had never lived outside of America. Why was she able to be so successful at her research?
Answer:
bc of her knowledge of various species,
the diagram below shows a strand of DNA matched to a strand of messenger RNA. what process does this diagram represent
Answer:
DNA transcription
Explanation:
In this process, DNA is transcribed to become strands of RNA, which will eventually be codified into proteins.
i hope this helps.
What feature of double-stranded dna makes it necessary to have a leading strand and a lagging strand during replication?.
Answer:
there must be a pre-existing chain of nucleotides
Explanation:
So RNA primers are used for initiation of new DNA chains.
RNA primer is short piece of RNA, synthesised at the end of the new strand with the help of DNA specific RNA polymerase enzyme called primase and primers provide free -OH for DNA polymerase to start polymersing. leading template strand requires primer only ones. But lagging template strand requires many primers. Once primer is ready DNA Pol(III) will come & start adding deoxyribonucleotide to the -OH of primer by complementary basepairing. Two nucleotides link each other by phosphodiester bond. The daughter DNA for template is synthesised continuously, Therefore called leading strand. DNA polymeraseIII has Exonuclease activityIt can add nucleotides in the direction. Replication is discontinuous on the other template with polarity because only a short segment of DNA strand can be built in direction due to exposure of a small stretch of template at one time.
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Location of melanocytes and tactile epithelial cells.
Answer:
The melanocytes and tactile epithelial cells (Merkel cells) are located in the stratum Basale.
Explanation:
A keystone species is
a central stone at the summit of an arch, locking the whole together.
a species on which other species in an ecosystem largely depend, such that if it were
removed the ecosystem would change drastically.
capable of causing extinctions of native plants and animals, reducing biodiversity
competing with native organisms for limited resources, and altering habitats.
Which one is it?
Answer:
i need to know the abcd
Explanation:
which one is it????? i cant see the multiple answers
What pigment, only present in plants, makes photosynthesis possible?.
Answer:
Chlorophyll
Explanation:
The mass of an empty cylinder is 200 grams. The mass of the cylinder with the mystery liquid is 250 grams. If the volume of the mystery liquid is 100 ml, what is the density of the liquid?
Show your work
Answer:
ok,so the mass of mystery liq.+cylinder is 250g
cylinder alone is 200g
mystery liquid's mass=50g
d=m/v
50/100
=0.5g/ml
Which are found on the right side of the arrow in a chemical equation?
Reactants
Products
Answer:
The right side of the arrow in a chemical equation would indicate the products. Think of it like this: You REACT to stubbing your toe by spilling a glass of water, and it PRODUCES a mess, so you clean it up. The reactants affect the products, or the outcomes of an experiment—or situation.
What molecules are you exhaling this very minute?
Answer:
carbon dioxide
Explanation: