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Related Questions
A mountain range divides a freshwater snail species into two large isolated populations. Erosion eventually lowers the range and brings the two populations together again, but when they mate, the resulting hybrids all produce sterile young. This scenario is an example of:
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Answer:
allopatric speciation.
Explanation:
Reproduction can be defined as a biological process which typically involves living organisms producing an offspring.
Basically, there are two (2) methods of reproduction and these are;
I. Sexual reproduction.
II. Asexual reproduction.
In this scenario, a freshwater snail species is divided into two (2) large isolated populations by a mountain range. This range is then lowered by an erosion and as such bringing the two populations of the freshwater snail species together again.
However, when the two snail species mate, the resulting hybrids all produce sterile young snails. Thus, this scenario is an example of allopatric speciation.
Allopatric speciation is also referred to as geographical speciation and it can be defined as a process in which two (2) biological populations of the same species become isolated from each other by geographical barriers or changes such as mountain range, emigration, etc. Thus, allopatric speciation is dominant with living organisms that reproduces sexually and it causes the isolated species to evolve newly with distinctive traits.
1.Write the equation for light dependent reaction of photosynthesis
2.Write the Equation for light independent reaction of Calvin cycle?
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Answer:
1. The overall chemical equation of the light-dependent reactions is given below:
12 H₂O + 12 NADP+ + 18 ADP + 18 Pi + light and chlorophyll ----> 6 O₂ + 12 NADPH + 18 ATP
2. The overall chemical equation for the light-independent reactions of the Calvin cycle is given below :
3 CO₂+ 6 NADPH + 5 H₂O + 9 ATP → glyceraldehyde-3-phosphate (G3P) + 2 H+ + 6 NADP+ + 9 ADP + 8 Pi
Explanation:
1. The light-dependent reactions convert light energy into chemical energy, producing ATP and NADPH which are used light-independent reactions to drive the synthesis of sugar molecules from inorganic CO₂ and water. Light-dependent reactions takes place in photosystem I and II. Photosystem I and Photosystem II ( PS I and PS II) are the two biochemical systems, active in chloroplasts, that serve as sites of electron transfer reactions in photosynthesis. Energy from sunlight is used to split water which releases electrons and hydrogen atoms which are transferred to NADP+ to produce ATP and NADPH and oxygen is produced as a waste product.
The overall chemical equation of the light-dependent reactions is given below:
12 H₂O + 12 NADP+ + 18 ADP + 18 Pi + light and chlorophyll ----> 6 O₂ + 12 NADPH + 18 ATP. Note that Pi refers to inorganic phosphate
2. The Calvin cycle refers to the light-independent reactions in photosynthesis. It occurs in three stages.
Stage 1 (Carbon fixation): In this first stage of the Calvin cycle, light-independent CO₂ is fixed by enzyme called ribulose bisphosphate carboxylase (RuBisCO) to ribulose bisphosphate (RuBP) to form glyceraldehyde-3-phosphate.
Stage2: ATP and NADPH are used to reduce 3-phosphoglycerate (3-PGA) into glyceraldehyde--phosphate (G3P). ATP and NADPH are used up in the process and are converted to ADP and NADP+, respectively.
Third stage: RuBP is regenerated, which enables the system to prepare for more CO2 to be fixed.
The overall chemical equation for the light-independent reactions of the Calvin cycle is given below :
3 CO₂+ 6 NADPH + 5 H₂O + 9 ATP → glyceraldehyde-3-phosphate (G3P) + 2 H+ + 6 NADP+ + 9 ADP + 8 Pi
The Earth has a magnetic field. If you were to use a bar magnet to represent the magnet causing the magnetic field, which representation would be correct? The Earth is shown with curved lines marked by arrowheads, which lead from the south geographic pole to the north. A bar magnet overlaid on Earth has S to the north geographic pole and N to the south. The Earth is shown with curved lines marked by arrowheads, which lead from the south geographic pole to the north. A bar magnet overlaid on Earth has N to the north geographic pole and S to the south. The Earth is shown with curved lines marked by arrowheads, which lead from the south geographic pole to the north. A bar magnet overlaid on Earth has S to the east along the equator and N to the west.
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Answer:
A
Explanation:
Answer:
A
Explanation:
8 In sexual reproduction, an offspring is produced with genes from both parents. When the offspring has a new genetic variation that it got from neither of its parents, it is called. A. an automotive B. a mutation C. a recessive gene D. a phenotype
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Answer: B
Explanation:
Mutations are changes in the DNA sequence that can lead to genetic diversity. Mutations are usually errors in DNA replication or mitosis.
Why does water feel cool when it evaporates?
O Evaporation uses energy, and this heat energy is taken from the body.
O Evaporation gives up energy, and this heat energy is added to the body.
O Evaporation makes the air moist, which makes it feel cooler.
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Answer:
i think its A
Evaporation uses energy, and this heat energy is taken from the body.
Answer:
Evaporation uses energy, and this heat energy is taken from the body.
Explanation:
CAN SOMEONE PLEASE HELP ME WITH THIS SCIENCE QUESTION I WILL MARK YOU BRAINLIEST THANK YOU !!!
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Answer:
sedimentary basins hope it helps
A group of researchers are monitoring the health of a salt marsh. They
measure high levels of nitrates and phosphates in the sediment of the marsh
but not in the water samples. In this instance, which ecological service is the
marsh providing?
A. coastal land
B. Aquatic habitat
C.Flood protection
D. Water purification
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Answer:
It is D
Explanation:
Trust me I've taken it already, and plus it talks about it not being in the water.
In the given instance, the ecological service which is providing the marsh is the water purification. Thus, the correct option will be D.
What is the Ecological service?
Ecological services or ecosystem services are the many and varied benefits which the humans are provided or get from the natural environment and the healthy ecosystems. Such ecosystems include, for example, the agroecosystems, forest ecosystem, grassland ecosystems, and also the aquatic ecosystems.
A group of researchers are monitoring the health of a salt marsh. They measure high levels of nutrients in the sediment but not in the water samples. In this instance, the ecological service which is providing marsh is the water purification.
Therefore, the correct option is D.
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List as many examples of seasonal changes of plants and animals that you can.
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Answer:
spring trees bloom flowers
summer trees grow leaves
fall tree lose leaves
winter tree hibernate or something
spring squirrels come out of hibernating
summer squirrels gather food
fall squirrels still gather food and prepare to hibernate
winter squirrels hibernate
Explanation:
Approximately 30% of all solar energy is reflected back into space. If 20% of the incoming solar energy is absorbed into the atmosphere and clouds, how much is absorbed by Earth's surface?
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Answer:
50% Will be absorbed by the earth's surface
barometers modified to measure the height above the sea level are called
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Answer:
When a barometer is supplied with a nonlinear calibration so as to indicate altitude, the instrument is called a pressure altimeter or barometric altimete
Explanation:
Altimeters
An altimeter is a device that measures altitude, the distance of a point above sea level. Altimeters are important navigation instruments for aircraft and spacecraft pilots who monitor their height above the Earth's surface.
PLEASE HELP !! ILL GIVE 40 POINTS ; PLUS BRAINLIEST !! DONT SKIP ANSWER.
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Answer:
angle PQN and angle ONQ are alternate interior angles
Explanation : Alternate Interior Angles are a pair of angles on the inner side of each of those two lines but on opposite sides of the transversal.
which event would most likely lead to a thunder storm
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i think the answer is (C)
Explanation:
The warm air becomes cooler, which causes moisture, called water vapor, to form small water droplets - a process called condensation. ... If this happens with large amounts of air and moisture, a thunderstorm can form.
PLEASE HELP !! ILL GIVE 40 POINTS ; PLUS BRAINLIEST !! DONT SKIP ANSWER.
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Answer:
i think its A im sorry if it isnt but im pretty sure its A but it might be wrong
Explanation:
Roger Sperry cut a newts optic nerve and rotated the eye. Axons from what used to be the dorsal part of the retina (now located on the ventral side) grew back to the target areas: Select one: A. that ordinarily get input from the ventral retina. B. equally and diffusely. C. that ordinarily get input from the dorsal retina. D. that ordinarily get input from the center of the retina.
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Answer:
C
Explanation:
that ordinarily get input from the dorsal retina
How do humans help plants during photosynthesis?
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Answer:
Humans breathe out carbon dioxside which plants need to live and grow during the process of photosynthesis.
Explanation:
They do this by a process known as photosynthesis. ... Photosynthesis and respiration are the two essential processes that allow life to sustain on earth. In a way, they are a cycle — plants help humans breathe by providing us with oxygen, and humans help plants "breathe" by providing them with carbon dioxide.
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An immunodeficiency condition called bare lymphocyte syndrome is caused by a genetic defect that results in an inability to synthesize MHC class II molecules.
a. True
b. False
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Answer:
True
Explanation:
This is because lymphocyte syndrome is a genetic condition where there is absence of or in ability of the cell to express histocompatibility complex class II or MHC class II and this lead to incapability of the immune system to fight infections. The immune system is compromised and weakened to fight infections.
The 2011 earthquake triggered a ... Question 3 options: hurricane volcano tsunami sand storm
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The frequency of genes that lead to favorable traits increases because
A.
favorable traits always start out as the rare form and become more common
B.
the genes for favorable traits are dominant over those for unfavorable genes
C.
Both B and D
D.
those genes continue on to the next generation when the individuals that contain the genes successfully survive and reproduce
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Answer:
The answeer is both B and D.
How can a poly genic trait be easily identified
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Answer: The presence of the polygenic trait masks the other possible alleles involved. There are only two possible phenotypes for the trait. The graphing of the possible phenotypes results in a bell curve. Usually, traits are polygenic when there is wide variation in the trait. For example, humans can be many different sizes. Height is a polygenic trait, controlled by at least three genes with six alleles. If you are dominant for all of the alleles for height, then you will be very tall.
Explanation:
Do you think atrazine should be used? Explain your reasoning
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Atrazine is safe to use so far.
Standards could change if EPA rules atrazine is more hazardous to health than previously thought. Currently, EPA standards allow 3 parts per billion (ppb) or less of atrazine to be present in drinking water.
HOW, down to an atomic level is the energy in lighting converted from one form to another.
Give 3-5 sentences
PLEASE HURRY
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Answer:
When properly stimulated, electrons in these materials move from a lower level of energy up to a higher level of energy and occupy a different orbital. Then, at some point, these higher energy electrons give up their "extra" energy in the form of a photon of light, and fall back down to their original energy level.
Explanation:
sorry but I cannot have sentences but all yours
The most common form of hemophilia is a defect in blood clotting factor VIII, which is caused by a mutant form of a gene on the X chromosome. Boys who inherit that mutation from their mother suffer from uncontrolled bleeding. Girls carrying one copy of this mutation have near normal blood clotting. Uncommonly, a girl is born with hemophilia even though both parents have normal phenotypes. Which of the statements might explain hemophilia in a girl born to parents with normal blood clotting phenotypes?
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Answer:
Nondisjunction during sperm arrangement and formation brought about her getting no sex-chromosome from her dad and an X chromosome from her mom, she is XO.
Explanation:
Nondisjunction during sperm arrangement and formation brought about her getting no sex-chromosome from her dad and an X chromosome from her mom; she is XO.
It is on the grounds that her mother happens to be a carrier of hemophilia and she transferred that mutant allele to her daughter and due to the fact that she did not get any sex-chromosome from her dad.
However, such mutant (X) communicates and expresses itself and she is hemophilic.
This (X) is not express in her mother because she possesses a recessive trait; as such it appears in the hom8zygous state.
A person who is heterozygous for type B blood has children with a type AB eren Versich
blood type is NOT possible anong thier children?
Type B
Tye A
Type o
Type AB
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When trrowing a ball why does the triceps muscle contract?
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Answer:
The contraction of the triceps muscle causes the arm to flex. The contraction of the triceps muscle causes the arm to extend. When added to the force of the biceps contracting it provides extra force to the ball.
At the equator, what kind of pressure will you most likely find?
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steps of photosynthesis
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Answer:
The Six stepls of Photosynthesis
1. When Leaves open their pores which is known as stomata.
2. Sunlight enters in the leaves through open pores.
3. Sunlight absorbed minerals from Carbon dioxide and water.
4. Absorbed minerals converted into glucose.
5. Glucose will change in green color pigment known as cholorophyll.
6. This process may also convert carbon dioxide into oxygen.
View the slides on the PowerPoint to match each of the cell structures with the correct letter labels for each of the following cells. Elodea Cell Cell wall _____ Chloroplast ____ Area of vacuole ___ Onion Cell Cell wall ___ Nucleus ___ Mitochondria ___ Cheek Epithelial Cell Cell membrane ___ Nucleus ___ BacteriA Bacterial Cells. View the bacterial cells on the PowerPoint and identify which cell (A, B, or C) is: Coccus ____________ Bacillus ____________ Spirillum ____________ Protista Amoeba can move via the extension of finger-like projections called pseudopodia, what prevents plant cells from moving in the same fashion? How does the euglena compare to both plant and animal cells (i.e. - explain what structure(s) might make it similar to plants and what structures might make it similar to animals).
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Answer:
10. View the slides on the PowerPoint to match each of the cell structures with the correct letter labels for
each of the following cells.
Elodea Cell Cell wall _B____ Chloroplast _A___ Area of vacuole _C__ Onion Cell Cell wall _B__ Nucleus __A_ Mitochondria _C__ Cheek Epithelial Cell Cell membrane _B__ Nucleus __A_ BacteriA Bacterial Cells. View the bacterial cells on the PowerPoint and identify which cell (A, B, or C) is: Coccus ________B____ Bacillus ______A______ Spirillum ______C______ Protista Amoeba can move via the extension of finger-like projections called pseudopodia
Explanation:
Amoeba can move via the extension of finger-like projections called pseudopodia, what prevents plant cells from moving in the same fashion?
Ans: The plants that prevent the information of pseudopodia have rigid cell walls. which is unlike to amoeba.
How does the euglena compare to both plant and animal cells (i.e. - explain what structure(s) might make it similar to plants and what structures might make it similar to animals).
Ans: Euglena are similar to plants because they both have chloroplast and are similar to animals because neither has a cell wall.
What functions does the red blood cell do for a human?
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Answer: Red blood cells carry oxygen from our lungs to the rest of our bodies. Then they make the return trip, taking carbon dioxide back to our lungs to be exhaled. The function of the red cell and its hemoglobin is to carry oxygen from the lungs or gills to all the body tissues and to carry carbon dioxide, a waste product of metabolism, to the lungs, where it is excreted.
Explanation:
Juan is making a chart to organize his notes about centipedes.
Which best completes the chart?
tear plants
dig
squirt liquid
inject poison
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Answer:
inject poison
Explanation:
edge2021
Answer:
D
Explanation:
In humans, dimples are dominant to no dimples and freckles are dominant to no freckles. A man with
no dimples or freckles mates with a woman who is heterozygous for both traits. Determine the
percentage of their offspring that will have the same genotype as their mother. Also determine the
percentage of their offspring that will have the same phenotype as their father.
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Answer:
I'm being honest the answer are in the pdf pls don't report me its not a scam
Explanation:
The correct answer is 25% of their offspring will have the same genotype as their mother.
25% of their offspring will have the same phenotype as their father.
What is genotype?The term genotype refers to an organism's whole complement of genes; in other words, it describes its genetic composition. In a more restricted meaning, the phrase can refer to the alleles, or alternative forms of a gene, that an organism carries.
what is phenotype?A phenotype is just an observable trait. Pheno means observe and is derived from the same root as "phenomenon." As a result, it's an observable sort of organism that can refer to anything from a common characteristic like height or hair color to the presence or absence of a disease.
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