Answer:
When homologous chromosomes form pairs during prophase I of meiosis I, crossing-over can occur. Crossing-over is the exchange of genetic material between homologous chromosomes. It results in new combinations of genes on each chromosome. ... It is obviously another source of genetic variation in offspring.
Explanation:
i looked it up on google
Explain why the legs of cats and grasshoppers are considered analogous.
2. Explain why the legs of cats and flippers of whales are considered homologous.
3. Explain how this diagram shows that cats and whales are more closely related than either is to an insect.
Answer:
2)Homologous Structures Humans Share With Animals
A dolphin's flipper, a bird's wing, a cat's leg, and a human arm are considered homologous structures. ... This structure serves as evidence of having a common ancestor, one that would have had a tail. All mammals share the homologous structure of the vertebrae in common.
3)WHERE IS THE DIAGRAM
Explanation:
If an oceanic plate and continent plate converge, which plate will sink?
Answer:
When an oceanic and a continental plate collide, eventually the oceanic plate is subducted under the continental plate due to the high density of the oceanic plate. Once again a benioff zone forms where there are shallow intermediate and deep focus earthquakes.
Explanation:
Chromosomes are found in the ______________ of a cell and carry genes.
organelles
nucleus
mitochondria
cytoplasm
Answer: nucleus
Explanation:
What is the sequence of the complementary strand for the DNA shown above?
hurry please
Answer:
either of the two chains that make up a double helix of DNA, with corresponding positions on the two chains being composed of a pair of complementary bases. a section of one nucleic acid chain that is bonded to another by a sequence of base pairs.
a cell is placed in a isotonic solution. How does the cell maintain homeostasis in the environment ?
Answer:
If a cell is placed in an isotonic solution, there will be no net flow of water into or out of the cell, and the cell's volume will remain stable. If the solute concentration outside the cell is the same as inside the cell, and the solutes cannot cross the membrane, then that solution is isotonic to the cell.
Explanation:
What will happen to the rate of
photosynthesis if a plant stops receiving
water?
A. The rate will increase.
B. The rate will decrease and eventually stop.
C. The rate will be unaffected.
The answer is B. Not A or C. B. Now go get it right
Answer: B. The rate will decrease and eventually stop.
Explanation:
how does the nervous system help the excretory system maintain homeostasis?
Answer:
The nervous system maintains homeostasis by controlling and regulating the other parts of the body. A deviation from a normal set point acts as a stimulus to a receptor, which sends nerve impulses to a regulating center in the brain.
Explanation:
The nervous system keeps the body in a state of homeostasis by controlling and regulating excretory system.
What is Homeostasis?In a broad sense, homeostasis refers to a system's stability or balance. It's the body's endeavor to keep its internal environment consistent. Internal environment stability necessitates regular monitoring and modifications as conditions change. Homeostatic control refers to the balancing of physiological systems within the body.How does nervous system regulates homeostasis?Because the nervous system does not store nutrients, it must get them from the bloodstream on a regular basis. Any disruption in blood flow might result in brain injury or death.The nervous system keeps the body in a state of homeostasis by controlling and regulating the other organs. A variation from a regular set point stimulates a receptor, which transmits nerve impulses to a brain regulating area.learn more about homeostasis here:
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4. Choose the microscopy technique that would best fit the needs of each scenario.
Scenario 1: Scientists are attempting to identify the specific type of leukemia a person has based on cell surface structures. ___
Scenario 2: Researchers are studying chemotaxis in white blood cells. Chemotaxis is the movement of living cells in response to a particular substance. ___
Scenario 3: Cell biologists are interested in measuring the distance between the inner and outer nuclear membranes, and need an instrument capable of producing images where the tiny distance between these two membranes is clear. __
Answer: Scenario 1: SEM
Scenario 2: Light
Scenario 3: TEM
Explanation:
The technique applied to observe and analyze objects that cannot be seen with the bared eye is called the microscopic technique.
1. The technique used will be SEM. A scanning electron microscope (SEM) is used to generate an image on the individual surface with the help of electron lasers.
It is useful in apprehending cell surface fabrication and topography.Therefore, to study the cell surface structure of leukaemia SEM is best.2. The light microscopy technique can be applied to study chemotaxis.
When there will be a movement in the living cell due to response towards chemical then the light microscope can be used to visualise the cells.Therefore to study chemotaxis light microscopy should be employed.3. The transmission electron microscope (TEM) method can be used to know the gap between the inner and outer layers. They are used for observing very thin segments of specimens.
Through the thin fragments, the electron flows easily and the image is produced.Therefore, TEM should be used by scientists to measure the distances.To learn more about the microscopy techniques follow the link:
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1. Describe the process of photosynthesis using the reaction for photosynthesis
2. What are the two sets of reactions of photosynthesis studied in class?
3. Which reactants and which products enter and are produced in which one of the
two sets of reactions?
4. What is NADPH, what is its function and what is actually carrying?
please I need help it due at 2:00
asap plz
Answer:
1. if you are talking about the formula its this: 6CO2 + 6H2O → C6H12O6 + 6O2
2. the light-dependent reactions and the Calvin cycle.
3. The photosynthesis chemical equation states that the reactants (carbon dioxide, water, and sunlight), yield two products, glucose, and oxygen gas.
4. As in other reactions, NADPH helps carry electrons and protons driven by sunlight into new carbon-carbon bonds, creating sugar molecules. NADPH is often kept at a higher concentration in the cytosol than NADP+, to allow for the easy reduction of small molecules into larger macromolecules.
Explanation:
I really hope this helps:)
What are common changes
In an environment?
Answer:shelter, land, prey
Explanation:
A plant cell has a 5%, percent salt concentration. It is placed into a solution
containing a 12%, percent salt concentration.
Explain what will happen to the cell and why?
Answer:
Water in cells moves toward the highest concentration of salt. ... If a higher concentration of salt is placed outside of the cell membrane, the water will leave the cell to bond with it. The loss of water from this movement causes plant cells to shrink and wilt.
Explanation:
A certain atom has 26 protons, 26 electrons, and 30 neutrons. Its mass
number is
Answer:
The mass number is 56
Explanation:
You just add the number of protons and neutrons to find the mass number of a atom.
What is circulatory system? Name its main organs.
Answer:
the system that circulates blood and lymph through the body, consisting of the heart, blood vessels, blood, lymph, and the lymphatic vessels and glands.
The circulatory system is composed of the heart and blood vessels, including arteries, veins, and capillaries.
Explanation:
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Which part of a flower grows into a seed?
pollen
egg cell
ovule
anther
Answer:carpels
In flowering plants, the female reproductive structures that produce seeds are contained within the carpels of the flower. A carpal consists of the stigma, style and ovary. The ovary contains ovules (eggs) that become seeds once they are fertilized.
Explanation:
Name 3 macro elements that are needed for formation of chlorophyll and 2 deficiency symptoms each of those elements when they are missing (Will mark brainliest)
answer:
carbon,hydrogen,and oxygen
explanation;
Which of these statements are true about physical medicine? Check all of the boxes that apply.
Physical medicine treats heart disease.
A common subspecialty of physical medicine is geriatric care.
Physiatrists operate on joints such as the knee and ankle.
Physiatrists recommend and fit leg braces.
Answer:
Physiatrists operate on joints such as the knee and ankle.
A common subspecialty of physical medicine is geriatric care.
Physiatrists recommend and fit leg braces.
Explanation:
Physiatrists treat a variety of medical conditions that affecting the brain, spinal cord, nerves, bones, joints, ligaments, muscles, and tendons etc. Physiatrists main aims to enhance and restore the functional ability of muscles and organs of those people who passes through physical impairments or disabilities. With this physical medicine people live a long and healthy life.
Answer:
2 and 4
Explanation:
Got it right edg
ASAP!!!!!!! I NEED HELP
Why are there two sets of phases during meiosis, but only one during mitosis? Think about what is different about meiosis and mitosis
Answer correctly or I will report
Answer:
Cells undergoing mitosis just divide once because they are forming two new genetically identical cells where as in meiosis cells require two sets of divisions because they need to make the cell a haploid cell which only has half of the total number of chromosomes.
Explanation:
How does soil erosion affect streams and rivers?
Explanation:
The effects of soil erosion go beyond the loss of fertile land. It has led to increased pollution and sedimentation in streams and rivers, clogging these waterways and causing declines in fish and other species. And degraded lands are also often less able to hold onto water, which can worsen flooding.
Is the troposphere high or low and what is the temperature there only answer if you know it
Answer: High
Explanation:
The average temperature of the troposphere is 62°F (17°C), Pls give thanks because I got hack
Which refers to the sum of all the forces that act upon an object?
A. net force
B. absolute force
C. balanced force
D. positive force
Answer:
Net force
Explanation:
Net force is the vector sum of forces acting on a particle or body. The net force is a single force that replaces the effect of the original forces on the particle's motion. It gives the particle the same acceleration as all those actual forces together as described by the Newton's second law of motion.
Answer:
net force
Explanation:
You rush through your lab activity and obtain a percent error of 50 percent. Why might your percent error be so high?
Explanation: Can you be more specific with that plz?
Chemicals and proteins in the cell read the DNA ___________ for building that make cells, tissue and organs.
(A.Instructions
(B.Genes
(C.Recipe
(D. Life manual
Genes of DNA can be read by chemicals and proteins for building that can make cells, tissue, and organs. Therefore, option "B" is correct.
What are genes?
Genes are composed of DNA which is the genetic material. Gene is the functional unit of heredity. Chromosomes are comprised of multiple genes. Genes code for a particular trait. More than one gene can code for a particular trait.
The function of DNA and RNA is controlled by genes. There are more than 3000 genes present. Mutation can occur in genes. Deletion and insertion are some types of mutation genes. Transposomes are called jumping genes. Sickle cell anemia and cystic fibrosis are some examples of gene mutations.
Genes code for the traits such as the color of eyes, height quality of hair, and more.
Learn more about genes, here:
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what is an energy transformation?
Answer: Energy transformation is the process of changing energy from one form to another.
Explanation: Remember that energy cannot be created nor destroyed but it can be transferred or changed from one form to another. For example, chemical to mechanical or electrical to thermal.
NEED ANSWERS IN 5 MINUTES, PLEASE
List two examples of diffusion in living organisms
One example of diffusion is something you're probably familiar with, breathing. Oxygen diffuses into your blood when you breathe.
Another example is Osmosis, where plants take up nutrients from the soil and distribute them throughout their system.
5. What are the building blocks of lipids?
A) Nucleic acids
B) Triglycerides
C) Amino acids
D) Glucose
Answer:
Its A
Explanation:
Nucleic acid
For each codon, find the correct tRNA anticodon and drag it to the ribosome. Start with the AUG codon
in the ribosome. Find and drag its match, the UAC anticodon, to it. Also, record this pair and the
associated amino acid, Met, to complete the first row of the data table.
PLEASE HELP I DONT KNOW HOW TO DO THIS AT ALL
Drag the correct tRNA anticodon into the ribosome. Therefore, A matches U and C matches G.
What is the UAC anticodon?The Ribosome Workbench uses the AUG codon as a universal signal to initiate translation. Because the methionine-bound tRNA has the anticodon sequence UAC, the AUG start codon signals the ribosome to insert into the amino acid methionine.
What is the correct tRNA anticodon for the mRNA codon 5 GGA 3?1 One codon is 5'-ACG-3'. What is the sequence of tRNA anticodons that bind? Which amino acids does tRNA have? The sequence of the tRNA anticodon is 3'-UGC-5', and the tRNA has the amino acid Thr, the amino acid encoded by the codon.
For more information on UAC anticodon, see
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Is baking soda organic or inorganic explain why?
Answer:
Inorganic
Explanation:
Baking soda can be found as a naturally occurring compound, but is more frequently manufactured from other naturally derived materials, like trona ore. Baking soda can be produced by the reaction of carbon dioxide and soda ash, a naturally occurring mineral. To my knowledge there is not an “organic” baking soda.
List four characteristics of plants.
Answer:
1. Plants produce their own food.
2. Plant cells have a cell wall.
3. Plants reproduce with spores and sex cells.
4. Plants have a vascular system.
Explanation:
Here is four characteristics plants have.
Plants produce food through photosynthesis so I included that here.
Hope this is correct, have a great day.
Which of the following statements explains why plants are essential to the carbon cycle?
Answer:
Plants absorb carbon dioxide, water and sunlight to make their own food, grow and release oxygen through photosynthesis. They're a huge part in keeping our air clean.
Explanation:
Hope this helps.
When does
transcription
happen?
Answer:
Transcription begins when RNA polymerase binds to a promoter sequence near the beginning of a gene (directly or through helper proteins). RNA polymerase uses one of the DNA strands (the template strand) as a template to make a new, complementary RNA molecule. Transcription ends in a process called termination.
Explanation:
Transcription Initiation. The first step in transcription is initiation, when the RNA pol binds to the DNA upstream (5′) of the gene at a specialized sequence called a promoter (Figure 2a). In bacteria, promoters are usually composed of three sequence elements, whereas in eukaryotes, there are as many as seven elements ...
when RNA polymerase binds to a promoter sequence near the beginning of a gene