Answer:
meiosis is important because it ensures that all organisms produced via sexual reproduction contain the correct number of chromosomes. Meiosis also produces genetic variation by way of the process of recombination
20. Minerals are identified by their
Which
gas makes
up most of the atmosphere, and is needed to build
proteins and DNA *
1 poi
Carbon
Water
Oxygen
Nitrogen
CO2
O Hydrogen
Answer:
oxygen makes up most of the gas in the atmosphere
Metal are malleable and ductile. Explain on the basis of the electron sea level?
Metallic Bonding is restricted to metals only. In the metallic bonding, There is a electrostatic force of atrraction between the metal ions (which are positive)
and the electrons(which are negative).
The metal ions are arranged in a lattice pattern which is the regular repetitive structure.
_____________________________________Electron Sea Level:Every metal atom donate one or two valence electrons, so due to the BULK presence of the electrons, It results in a formation of sea of electrons. So the valence electrons don't just stay on their own atom, they roam around the whole metal. They are just like a sea of electrons. This is why it is called the electron sea model. basically metal ions are present as a iceberg or island in the freely floating sea of electrons.
_____________________________________How is Sea of electron related to the malleable and ductile property?The sea of electron works as a electron GLUE, That means the metal ions are strongly ATTRACTED to the electron, so When apply pressure on the metals they DONT BREAK that means they are not brittle but malleable and ductile. This is because of the moving electrons and because the cations slide easily past each other, The ability of the atoms to roll over each other into new positions without breaking the metallic bond is because of the electron glue.
_____________________________________IMPORTANT STATEMENTSBrittle; Hard but breakable due to absence of sea of electron.
Malleable and Ductile; Transformed into sheets and thin wires so they are somewhat ELASTIC.
The diagram illustrates the water cycle.
Parts of the water cycle labeled U through Z. U: Water moving from a lake into the clouds. V: Clouds. W: Water falling from clouds as rain and snow. X: Water moving from ground to the clouds. Y: Water flowing down the mountainside into a lake. Z: Underground water going into lake.
Which letter represents runoff?
U
W
X
Y
Answer:
The answer is Y
Explanation:
Just took the test
Answer:
Y is your answer
Explanation:
What is the process by which cells release energy in the absence of
oxygen? -
possible answers :
aerobic
anaerobic
calorie
cellular respiration
fermentation
glycolysis
Krebs cycle
matrix
NAD+
Answer:
This process is called aerobic respiration because it requires air (oxygen). In the absence of oxygen, the cell uses a process called anaerobic fermentation. or simply fermentation. ... Because aerobic respiration breaks the sugar all the way down, it releases much more energy than fermentation.
Why is it logical for the level of FSH to fall greatly following ovulation?
Answer:
During each menstrual cycle, there is a rise in follicle stimulating hormone (fsh) in the first half of the cycle that stimulates follicular growth in the ovary. After ovulation the ruptured follicle forms a corpus luteum that produces high levels of progesterone. This inhibits the release of fsh!
please help 50 points (real answers please) questions in the picture
Answer:
plasma membrane
other nonpolar molecules
Explanation:
A scientist at the polar ice cap was studying an ice sample from hundred of meters below the surface. While examining the ice, the scientist found some cells from many years ago. Using an electron microscope, the scientist identified these cell structures: a cytoskeleton, mitochondrion, nucleus, cell wall, and ribosomes. What kind of organism did the scientist find? (LS1.2)a. plantc. virusb. bacteriad. animal
Answer:
the organism is a plant.
Explanation:
As the scientist, a cytoskeleton, mitochondrion, nucleus, cell wall, and ribosomes, we can say that it is a eukaryotic cell since it has a differentiated nucleus. Also within eukaryotic cells, plant cells are those that have cell walls.
All structures are typically found in a plant cell.
Why does a submarine rise when its volume is increased? a. Because it now weighs less c. Because it fills with air b. Because its density is now lower than the water around it d. Because it is less buoyant when it is larger Please select the best answer from the choices provided A B C D
Answer:
A
Explanation:
A
What kind of allele results in the trait indicated by the green color being expressed in
the individuals shown here?
Answer:
dominant
Explanation:
because the dominant is present as it's phenotype
Which organelle is the primary site of protein production? nucleus ribosomes cytoplasm cell membrane
Answer:
Explanation:
A ribosome is an organelle that serves as the site of protein synthesis. It can be found free floating in the cytoplasm or attached to the ER
ANSWER IS RIBOSOMES
Answer:
B) ribosomes
Explanation:
PLEASE HELP MEEEE!!
How does the ozone layer affect life on Earth? (Site 1)
Answer:
It affects life on Earth by causing the heat rays of the sun weaker.
Explanation:
The ozone layer acts as a shield for life on Earth. The stratospheric ozone layer absorbs ultraviolet (UV) radiation, preventing dangerous UV rays from hitting Earth's surface and harming living organisms.
how dose each level of organization in your body help make life possible?
How does the information from the stimuli get communicated to the brain?
Answer:
Explanation:
Sensory receptor interact with stimuli, such as light sound temperature and pain which is transformed into the code that is carried to the brain by the chain of neurons. Once the signal reaches the end of an axon, which is at the end of neuron, a neurotransmitter is released and the process repeats.
The information is sent in the form of nerve impulses and reaches the spinal cord through the sensory neurons of the PNS.
How does a lion get its source of nitrogen to form its DNA or proteins?
Answer: The protein in their diets
Explanation:
The lion gets its source of nitrogen to form protein in its diet.
What is protein?Proteins are macronutrients that are present in foods. There are two types of proteins. Essential and nonessential. Non-essential proteins are synthesized in the body and essential proteins are needed to eat by taking food.
A lion is an animal, and animals synthesize some proteins in their body, and some proteins are to be taken from the food. Protein is necessary for the growth of the body. It gives strength to the body.
The protein synthesis is done in the cell of the animals. But the nitrogen, that the animals get is from the diet they eat which is meat and plants. It depended upon its diet. Some animals are carnivorous and some are herbivorous.
Therefore, the lions get their protein from their diet.
To learn more about protein, refer to the link:
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What will be the phenotype of the fly that grows from the fertilized cell shown below?
A. Normal wings, black body, antenna, and red eyes.
B. Curly wings, brown body, legs on head, and red eyes.
C. Curly wings, brown body, legs on head, and orange eyes.
D. Normal wings, brown body, legs on head, and red eyes.
Answer:
D
Explanation:
Normal wings, brown body, legs on head, and red eyes.
which is common to both photosynthesis and respiration
Why is mitosis important to unicellular organisms?
What is the Order of this?
the answer is a
87654321
Why do you think surface waves are the slowest moving waves?
Answer:
S waves are more dangerous than P waves because they have greater amplitude and produce vertical and horizontal motion of the ground surface. The slowest waves, surface waves, arrive last. They travel only along the surface of the Earth.
Explanation:
Answer:
They move a little more slowly than P waves, and can only pass through solids. As S waves move, they displace rock particles outward, pushing them perpendicular to the path of the waves. ... Surface waves are the slowest moving of all waves, which means they arrive the last
Explanation:
Savannah is asked to explain the locations of the stages of cellular respiration. What location should she give for the site of the Krebs cycle
reactions?
A. the cell membrane, which surrounds the cell
В.
the nucleus, the innermost part of the cell
с
the matrix of the mitochondria
D. the cytoplasm of the cell
Answer:
believe the answer is c
Within the mitochondrial matrix of mitochondria, the Krebs cycle occurs. In the cytoplasm of the cell, glycolysis happens, hence option C is correct.
What is Krebs's cycle?The Krebs cycle processes occur in the mitochondrial matrix, a dense solution that surrounds the mitochondrial crests in eukaryotes. In addition to water, the matrix also includes all the enzymes, coenzymes, and phosphates required for the cycle's biochemical reactions.
While the majority of anaerobic (without oxygen) and aerobic (with oxygen) respiration respectively occurs in the cytoplasm and mitochondria of the cell.
The cycle occurs in the mitochondrial matrix and results in the production of chemical energy in the forms of ATP, FADH2, and NADH.
Therefore, in the mitochondrial matrix of mitochondria, the Krebs cycle occurs, hence option C is correct.
Learn more about Krebs's cycle, here:
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Why is it more common for birds to have nests with a few eggs rather than just one or a lot?
Explanation:
The large size of a egg makes it difficult for the female to retain more than a single one egg at a time - carrying eggs would make flying harder and require more energy. (Bird eggs vary in size from the tiny 0.2 gramme eggs of hummingbirds to the enormous 9 kilogram eggs of the extinct elephant bird.)
Just as an aircraft cannot fly if it is overweight, all female birds must dispense with the fertile egg as soon as it is formed. And because the egg is such a protein-rich high-nuitrition prize to all sorts of predators, birds must find a secure place to hatch their eggs. Although birds' eggs appear to be fragile, they are in fact extremely robust. The oval shape applies the same rules of engineering as an arched bridge; the convex surface can withstand considerable pressure without breaking. This is essential if the egg is not to crack under the weight of the sitting bird. It takes 26 pounds of pressure to break a swan's egg and 120 pounds to smash the egg of an ostrich.
Female birds have one working ovary, unlike mammals, which have two. Ovaries are the organs where eggs are produced. A bird's ovary looks like a tiny bunch of different-sized grapes.
John and Pat are identical twins with identical DNA. John works in a movie theater, and Pat works as a lifeguard. They have very different skin pigmentation. Which is the best explanation of the difference? Skin color, a polygenic trait, is also determined by environmental factors. Skin color, a polygenic trait, is also determined by the sex of the individual. Skin color, a trait that demonstrates incomplete dominance, is also determined by environmental factors. Skin color, a trait that demonstrates incomplete dominance, is also determined by the sex of the individual.
Answer:
A. Skin color, a polygenetic trait, is also determined by environmental factors.
Explanation:
When you are a lifegaurd you are outside much more which means you are very likely to get a tan; Therefore changing the pigment of Pat's skin.
I hope this helps you :) Have a nice day!
The study of genes and inheritance is called genetics. In a gene pair, one allele is dominant and the other is recessive.
The correct answer is the variation in gene combination.
What is polygenic inheritance?A character that is controlled by more than one pair of alleles is called polygenic inheritance. The best example is skin pigmentation which is controlled by 6 alleles or 3 gene pairs.According to the question, pigmentation is different due to the combination of the different genes. These genes produced melatonin which decides the skin tone, The dominant genes code for a darker tone, and the recessive gene code for a lighter tone.
Hence, the correct answer is mentioned above.
For more information about the genes, refer to the link:-
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how does the action og wind affect a rock appearance
Why do organisms breathe?
What are the products of krebs cycle?
Answer:
What are the Krebs Cycle products? Electron Carriers (NADH and FADH2), ATP, and Carbon Dioxide.
Explanation:
For one cycle, two molecules of carbon, three molecules of NADH, one molecule of FADH2 and one molecule of ATP or GTP are produced. Each glucose molecule produces two molecules of acetyl CoA, enough for two cycles. These products can be multiplied by two to produce the per-glucose yield. Though only one ATP (or GTP) is produced directly per cycle, the products NADH and FADH2, can produce ATP (or GTP) in a further process of cellular respiration called oxidative phosphorylation. The main function of the Krebs cycle is to produce energy, stored and transported as ATP or GTP. The cycle is also central to other biosynthetic reactions where the intermediates produced are required to make other molecules, such as amino acids, nucleotide bases and cholesterol. The Krebs cycle is found in all cells that use oxygen. Combined with the process of oxidative phosphorylation, the Krebs cycle produces the majority of energy used by aerobic cells with the percentage energy provided for humans being greater than 95%.
Why do you think the Staghorn coral's skeleton is so lightweight?
Answer:
The success of staghorns is partly due to their lightweight skeletons, which often grow quickly enough to outcompete other corals for sunlight, a resource demanded by their photosynthesizing algae. Some staghorn species can grow 4 to 8 inches (10 to 20 centimeters) per year — a blistering speed by coral standards.
Explanation:
What is the major distinction between living and nonliving matter?
Answer:
All living things breathe, eat, grow, move, reproduce and have senses. Non-living things do not eat, grow, breathe, move and reproduce.
Explanation:
a living matter is able to control chemicals activities with organic catalyst
All cells contain cell membranes. Which of the following describes the composition of cell membranes?
2 points
Cell membranes are composed of carbohydrate chains, which allow all materials to enter and leave the cell.
Cell membranes are composed of cellulose, which provide rigidity for the cell.
Cell membranes are composed of cytoplasm, which allows proteins to be excreted by the cell.
Cell membranes are composed of lipid molecules, which provide a flexible structure.
Answer:
D
Explanation:
1. What kind of erosion has helped paleontologists and geologists study the rock layers in the Badlands National Park?
A. The mechanical forces of wind, water and freezing wore away the layers of rock.
B. Chemical erosion causing hydration causing rocks to break up and ways away.
C. A combination of chemical and biological erosion wore away layers of rock.
D. Biological weathering from lichen and bacteria colonies ate away at the rock layers.
Answer:
A
Explanation:
In Badlands National Park, rain, wind, and frost have carved steep canyons, sharp ridges, gullies, spires, and knobs out of the Dakota prairie, providing a glimpse into the pace of geologic change.