Answer:
Your lungs contain many small, elastic air sacs called alveoli. With each breath, these air sacs take in oxygen and release carbon dioxide. Normally, this exchange of gases occurs without problems. But sometimes, the alveoli fill with fluid instead of air, preventing oxygen from being absorbed into your bloodstream.
Explanation:
Answer:
The fluid represents the outermost layer of the alveolar surface that is directly exposed to air and thus to the environment. Alveolar fluid prevents desiccation of the epithelial cells and also functions as a physical protection barrier against inhaled particles and irritants. Explanation: hope this helps
Calculate the kinetic energy of a
30 g bullet fired at 200 m/s.
Step 1: Identify the formula needed to solve this problem.
The formula for kinetic energy (KE) is:
KE = 1/2m~v^2
m = mass
v = velocity
Step 2: Make a list of the values given in the question.
mass (m) = 30 g
velocity (v) = 200 m/s
[tex] \frac{1}{2} m {v}^{2} \\ \frac{1}{2} \times 30 \times {200}^{2} \\ 15 \times 40000 \\ = 600000[/tex]
Answer:
6 × 10⁵ J
Explanation:
Kinetic Energy of a moving mass is defined as, half of the product of it's mass and the square of it's velocity.
[tex] \boxed{ \mathsf{K.E. = \frac{1}{2} m( {v})^{2} }}[/tex]
Mass of the bullet (m) = 30 gvelocity (v) = 200 m/ s[tex] \implies\mathsf{K.E. = \frac{1}{2} \times 30 \times ( {200})^{2} }[/tex]
[tex] \implies\mathsf{K.E. = 15 \times 4 \times {10}^{4} }[/tex]
[tex] \implies\mathsf{K.E. = 60 \times {10}^{4} }[/tex]
[tex] \implies \underline{\mathsf{K.E. = 6 \times {10}^{5} J }}[/tex]
what will happen if phase changes didn't exist?
Answer:
Matter can exist in one of several different states, including a gas, liquid, or solid state. The amount of energy in molecules of matter determines the state of matter.
A gas is a state of matter in which atoms or molecules have enough energy to move freely. The molecules come into contact with one another only when they randomly collide.
A liquid is a state of matter in which atoms or molecules are constantly in contact but have enough energy to keep changing positions relative to one another.
A solid is a state of matter in which atoms or molecules do not have enough energy to move. They are constantly in contact and in fixed positions relative to one another.
Explanation:
Which of the following is a biological hazard?
a) Noise
b) Fiber
c) Mold
d) Dust
Answer:
ur answer is c i belive becasue it makes the enviroment around people hard to live in
Explanation:
Which group lists the levels of genetic information in order from smallest to largest.
Smallest to Largest:
1. Nucleotide
2. Gene
3. Chromosome
4. Genome
Nucleotide, Gene, Chromosome and Genome is the levels of genetic information in order from smallest to largest.
What is Chromosome?Chromosomes are the thread-like structure made up of protein (histones) and a single molecule of DNA which carries all the genetic information in it. It is located in nucleus.
Human have 23 pairs of chromosomes including pairs of 22 chromosomes (i.e. Autosomal Chromosomes) and 1 pair of Sex Chromosome (XX or XY).
Each pair contain two Chromosomes inheriting from the parents, half from mother and another half from the father.
Each chromosome have a point which is constricted in the middle known as Centromere, which divides chromosomes into two arms i.e. short arm “p” and long arm “q”.
Thus, Nucleotide, Gene, Chromosome and Genome is the levels of genetic information in order from smallest to largest.
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How does cell division occur in prokaryotes?
Answer:
How does cell division occur in prokaryotes? - Cell division occurs through a process call binary fission in which the DNA is copied, the cell membrane pinches inward to split and form 2 genetically identical cells. Examples include ecoll and some types of bacteria
Hope this helps :)
The minimum number of microorganisms necessary to enter the body and establish infection is termed the _______.
Answer:
it is term to the power of the White blood cells
why shouldnt you move the objective lense towards the stage when focusing
7)When a body cell divides through the process of mitosis, the chromosomes in the daughter cells *
10 points
are formed when chromosomes from the parent cell cross over.
are identical to the chromosomes of the parent cell.
represent only the healthiest chromosomes from the parent cell.
represent only half of the chromosomes in the parent cell.
8)Before a cell enters mitosis, what happens to the genetic information in that cell? *
10 points
The information is duplicated.
The information is selectively mutated.
The information is halved.
The information is completely changed.
9)Which of the following best describes how mitosis is related to cellular reproduction? *
10 points
Mitosis is a phase in asexual reproduction that results in the formation of similar, but not identical, nuclei in the daughter cells.
Mitosis is a phase in asexual reproduction that results in the formation of identical nuclei in the daughter cells.
Mitosis is a phase in sexual reproduction that results in the formation of similar, but not identical, nuclei in the daughter cells.
Mitosis is a phase in sexual reproduction that results in the formation of identical nuclei in the daughter cells.10)Which of the following occurs during the interphase stage of the cell cycle? I. DNA is replicated. II. The cell divides. III. The cell grows in size. *
10 points
II only
I and III only
I, II, and III
I and II only
11)A diagram of the cell cycle is shown below. Which of the following statements best describes what happens during the S phase of the cell cycle? *
10 points
Captionless Image
The cell's chromosomes separate.
The contents of the cell divide.
The cell's DNA is replicated.
The cell prepares for mitosis.
12)At a point during a cell's development, it begins to differentiate. How does differentiation occur? *
10 points
Certain genes are turned on and others are turned off; this action produces adult cells that are specialized
As a cell matures, genes that are not necessary to its function are ejected out of the cell through active transport.
The number of chromosomes in the cell is reduced by half; this action triggers the specialization of the cell.
A developing cell's function is determined by the number of organelles that are contained in the cell.
Through the mitotic process, two identical diploid daughter cells are produced. Mitosis is preceeded by the interphase and followed by cytokinesis. 7) b. / 8) a. / 9) b. / 10) b. / 11) c. / 12) a.
-------------------------------------------------
The interphase occurs before cell division. It is composed of the G1, S, and G2 stages.
During the G1 stage, the cell duplicates in size. The organelles and other cytoplasmatic structures duplicate. The high intense biochemical activity is characteristic of this stage. During the S stage occurs the DNI molecule replication process. At this point, also happens the synthesis of histones and other associated proteins. The G2 stage is the final one before the cellular division. Here begins the slow process of DNI condensation. Duplication of centrioles completes. Structures such as spindle fibers are assembled.
Mitosis is a process by which, from a diploid somatic cell (2n), two daughter diploid cells (2n) are produced.
Daughter cells are identical to the original cell.
Mitosis occurs in only one phase, divided into four stages.
In the prophase, it occurs chromosomes condensation and nuclear membrane breaks. During the metaphase, chromosomes are taken toward the center of the cell by the spindle apparatus. Once in the equatorial plane, chromosomes line up.Each chromatid joins with a microtubule of opposites poles.
In Anaphase, bonds between chromatids break. They separate and migrate to the opposite poles. In telophase, duplicated chromosomes are already in the corresponding poles, and the nuclear membrane forms again in each pole.Finally, cytokinesis occurs.
*************************************
Now, according to this theoretical framework, we can answer the questions.
7) b. are identical to the chromosomes of the parent cell.
8) a. The information is duplicated.
9) b. Mitosis is a phase in asexual reproduction that results in the formation of identical nuclei in the daughter cells.
10) b. I and III only
11) c. The cell's DNA is replicated.
12) a. Certain genes are turned on and others are turned off; this action produces adult cells that are specialized
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During meiosis, two sets of chromosomes in a cell are divided among the nuclei of four cells resulting from the process. Each nuclei has
half the number of chromosomes as the original cell.
one–fourth the number of chromosomes as the original cell.
twice the number of chromosomes as the original cell.
the same number of chromosomes as the original cell.
Answer:
half the number of chromosomes as the original cell
Explanation:
12. Which is NOT a natural cause of extinction?
A. Disease
B. Catastrophic events
C. Introduction of new species
D. Competition due to overpopulation
24. Which is NOT true about energy transformation?
A. Energy is essential to all organisms.
B. Food contains energy that is needed by all organism.
C. Heterotrophs feed on autotrophs and other heterotrophs to gain energy.
D. Autotrophs do not need energy because they can produce their own food.
23. Which is the CORRECT sequence of events in cellular respiration?
A. Glycolysis - fermentation - Krebs Cycle
B. Glycolysis - Krebs Cycle - Electron Transport
C. Krebs Cycle - Electron Transport - Glycolysis
D. Krebs Cycle - Glycolysis - Electron Transport
2. In humans there are four types of blood; type A, type B, type AB and type O. A person with a genotype of IaIa or Iai will have blood type_____?
A. A
B. B
C. O
D. AB
4. A couple has four children, one son and three daughters. What is the chance that the fifth child will be a daughter?
A. ¼
B. ½
C. ¾
D. 1/5
22. Cellular respiration releases energy by breaking down_______.
A. ATP
B. water
C. carbon dioxide
D. food molecules
5. A man is colorblind but there is no history of this disorder in his wife’s family. What is the chance that their son is color
blind?
A. 0
B. 25%
C. 75%
D. 100%
25. Which BEST summarizes the process of respiration?
A. Water + Carbon Dioxide ( light) sugar + oxygen
B. Sugar + Oxygen (enzymes) water+ carbon dioxide +energy
C. Water + Sugar ( light ) carbon dioxide + oxygen
D. Oxygen + Water (enzymes) sugar + carbon dioxide + energy
1. A father with blood type AB and a mother with blood type O will probably produce offspring with a blood type ___. *
A. A
B. B
C. A or B
D.AB or O
6. What is a sex- linked trait that results in the inability to have normal blood clotting?
A. baldness
B. color blindness
C. diabetes
D. hemophilia
11. What causes species extinction?
A. Pollution and reforestation
B. Reforestation and carbon emission
C. climate change and over consumption
D. conservation and consume
18. The pigment molecules responsible for photosynthesis are located in the _______? *
A. Mitochondria
B. Cytoplasm of the cell
C. Stroma of the chloroplasts
D. Thylakoid membrane of the chloroplasts
13. Which part of a leaf contains most of the chloroplasts?
A. Lower epidermis
B. Palisade mesophyll
C. Spongy mesophyll
D. Upper epidermis
19. At optimum light intensity, which atmospheric gas most directly influences the rate of photosynthesis?
A. Nitrogen
B. Oxygen
C. Sulfur
D. Carbon Dioxide
14. What part of the leaf is this tiny opening in the lower epidermis which makes it rough and responsible for the entrance and exit of gases in plants?
A. xylem
B. phloem
C. stomata
D. guard cells
16. In which part of the chloroplast does light reactions of photosynthesis takes place?
A. Grana
B. Stroma
C. Inner membrane
D. Outer membrane
17. Which is NOT needed to make food in plants?
A. Flower
B. Sunlight
C. Chlorophyll
D. Carbon Dioxid
8. Color-blindness is inherited as a sex-linked recessive trait. If a normal woman, carrier of the gene marries a man with normal color vision. What would be the expected phenotype of their children with reference to color-blindness?
A. All color-blind
B. 2 carriers, 2 color-blind
C. 1 normal, 3 carriers
D. 2 normal, 1 carrier, 1 color-blind
3. Blood type O has both antibodies A and antibodies B in the plasma but has no antigen on its erythrocytes or red blood cells. That is why Blood Type O is considered UNIVERSAL______.
A. Blood
B. Donor
C. Marker
D. Recipient
7. Melvin’s thinning hair is like that of his father. This characteristic of baldness is due to
A. multiple alleles
B. sex-linked
C. sex-influenced
D. sex-limited
Answer:
A bowling ball weighs 15 pounds on Earth and weighs 4 pounds on the planet Saturn. You could determine a 100–pound earthling's weight on Saturn using the proportion:
Explanation:
a.
StartFraction 15 Over 4 EndFraction = StartFraction b Over 100 EndFraction
c.
StartFraction 4 Over 15 EndFraction = StartFraction 100 Over b EndFraction
b.
StartFraction 15 Over 4 EndFraction = 100 Over b EndFraction
d.
either a or c
DNA molecules separate into single strands which are then used to construct two identical strands of DNA this process ensures genetic
A)consistency
B)variability
C)diversity
D)reduction
Answer: A)consistency
Explanation:
if a dna strand has the nucleotide sequence of CCGAGTTG, what is the nucleotide sequence of the complementary strand
Answer:
i dont know
:>
Describe how the Earth’s surface changed over time?
Answer:
Earth's surface is constantly changing. Wind, water, and ice break down large rocks and move sediments on the surface. It usually takes years for weathering, erosion, and deposition to cause noticeable changes. Some events, though, change Earth's surface much more quickly.There are basically 2 types of changes that occur to the earth's surface (i) Slow change and (ii) fast change. Fast changes occur through the actions of earthquakes, volcanoes, landslides, etc. while slow change takes time and has a process.
Explanation:
Our home planet Earth is a rocky, terrestrial planet. It has a solid and active surface with mountains, valleys, canyons, plains and so much more. Earth is special because it is an ocean planet. Water covers 70% of Earth's surface. When it comes to changes on the Earth's surface, the main processes to take into account are plate tectonics and the rock cycle as well as the sea-floor spreading. ... These collisions causes mountains and volcanoes to form on the plate boundaries and thus changes the shape and form of the landmass
6. Challenge: Based on the weathering patterns, guess the rock type shown in each photo.
why is a source of information type of document important in writing science research paper
Answer:
Explanation:
Its important to have resources that way the reader can go back and verify the information that is on the research paper for their own reasons
Think about the importance of energy. Without a source of energy organisms cannot respond, build, reproduce, or carry out most of the functions of living things. From where does our energy come? Explain how Photosynthesis and Cellular Respiration are important in your everyday life. Be Scientific! 5-6 sentences!
Answer:
Cellular respiration and photosynthesis are important parts of the carbon cycle. The carbon cycle is the pathway through which carbon is recycled in the biosphere. While cellular respiration releases carbon dioxide into the environment, photosynthesis pulls carbon dioxide out of the atmosphere. The exchange of carbon dioxide and oxygen during photosynthesis and cellular respiration worldwide helps to keep atmospheric oxygen and carbon dioxide at stable levels.
Photosynthesis is a very important process in plants. It helps in the formation of glucose in plants. Cellular respiration takes place in human beings.
What is energy?Energy is the ability to do work. All living organisms require energy to do work. Energy is transformed to chemical energy in plant cells through a process called photosynthesis.
Plants utilise the chemical energy stored during photosynthesis in their cellular respiration for essential life functions. Energy is changed during both photosynthesis and cellular respiration.
The light-dependent and light-independent processes of photosynthesis are also important for plant management.
Therefore, Photosynthesis is a very important process in plants. It helps in the formation of glucose in plants. Cellular respiration takes place in human beings.
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glucose molecules are to starch as ________ are to proteins.
Answer:
Amino acids
Explanation:
Glucose molecules are to starch what amino acids are to proteins; the glucose molecules are the monomeric units of the starch, just as the amino acids are the monomeric units of the protein.
What is the significance of the monomers?Polymers such as starch, protein, and fatty acids are found in living bodies such as those of animals and plants and polymers are made up of monomeric units such as glucose monomers that are bonded to each other by glycosidic bonds make starch, and amino acids are the monomeric units of proteins that are bonded by peptide bonds. These are necessary for the storage molecule, as well as for the cell's structural and functional units.
Hence, glucose molecules are to starch what amino acids are to proteins; the glucose molecules are the monomeric units of the starch, just as the amino acids are the monomeric units of the protein.
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Help me label these parts please
Answer:
1. Cell Body
2. Nucleus
3. Endoplasmic reticulum
4. Mitochondria
5. Dendritic Branches
6. Dendrite
7. Golgi Apparatus
8. Axon
9. Telodendria
10. Synaptic Terminals
Explanation:
I am smart like that :)
1. Which of the following can cause a short circuit? A.When a wire breaks B.When theh insulation around a wire is frayed C.When the battery runs out of electricity D.When there is no resistor in the circuit.
Answer:
When the insulation around a wire is worn or frayed.
Explanation:
Im on the quiz!
Answer:
When the insulation around a wire is worn or frayed.
To some extent, sensory receptors in the skin are specialized to detect and register specific stimuli. Please select the best answer from the choices provided T F.
Sensory receptors in the skin being specialized to detect and register
specific stimuli is True.
The skin is an example of a sense organ found in the body . It contains
receptors which helps to detect and respond to stimuli. There are
different stimuli such as touch, pressure, pain and temperature
This means that the skin being a sense organ is able to detect and register
specific stimuli as a result of the presence of its receptors.
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Answer:
True or False? TRUEExplanation:
The tall allele is dominant and the dwarf allele is recessive. What is the abbreviation for the dwarf allele
Answer:
t
Explanation:
really just lowercase but I would you T,t because your talking about being tall or dwarf so you need to know that the T is tall and the t is dwarf
Hope this helped
What could happen if the brain stem were damage
ANSWER:
A brain stem injury can cause DIZZINESS or LACK OF MOTOR FUNCTION,with more severe cases resulting in PARALYSIS,COMA,or DEATH.Treatment can be extremely expensive and many victims are unable to work while coping with a brain stem injury.
What must happen before a cell can begin mitosis? View Available Hint(s) for Part A The sister chromatids must be separated. The nuclear envelope must
Answer:
What must happen before a cell can begin mitosis? The chromosomes must be duplicated, which occurs during interphase.
Explanation:
How to find number of alleles present in a population.
Answer:
Count how many times the allele appears.
Explanation:
Dividing also becomes part of it.
A person wakes up at the same time every day and always feels hungry shortly after he wakes up. These two events would correspond with the
a. pineal gland controlling calcitonin, followed by thyroid gland controlling thyroid hormone
b. pineal gland controlling melatonin, followed by thyroid gland controlling thyroid hormone
c. pineal gland controlling melatonin, followed by parathyroid gland controlling thyroid hormone
d. pineal gland controlling melatonin, followed by thyroid gland controlling parathyroid hormone
Answer:
A
Explanation:
Most of Earth's energy comes from the Sun. Where does the rest come from?
a. internal heat
b. nuclear fusion
c. biomass
d. fossil fuels
Explain
Answer:
The answer is nuclear fusion
Explanation:
Solar energy is created by nuclear fusion that takes place in the sun. Fusion occurs when protons of hydrogen atoms violently collide in the sun's core and fuse to create a helium atom.
which of the following scenarios is least likely to have a detrimental impact on an ecosystem?
A. people fish every species at a slower rate than they can repopulate.
B. people regularly engage in trolling catching numerous species as by catch.
C. people fish sharks for sharks fin soup at a faster rate than they can repopulate.
D. people fish bluefin tuna to the point that they become endangered.
cells in the nervous system which have various functions related to support and nourishment are called:
brain or nervous system cells are called as neurons
Cells in the nervous system which have various functions related to support and nourishment are called glial cells.
What are the functions of glial cells?Glia, also called glial cells (gliocytes) or neuroglia, are non-neuronal cells in the central nervous system (brain and spinal cord) and the peripheral nervous system that do not produce electrical impulses.
Functions include: clean up brain "debris"; transport nutrients to neurons; hold neurons in place; digest parts of dead neurons; regulate content of extracellular space; promote synaptic connections.
Any of the cells that hold nerve cells in place and help them work the way they should. The types of glial cells include oligodendrocytes, astrocytes, microglia, and ependymal cells.
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What is a rock? What are the main components of a rock
please say
Answer: A rock is a naturally occurring solid mass made of either one mineral or a variety of. Minerals are the main components.
Explanation:
What's metamorphism?
A) The process by which new minerals form from existing minerals that become unstable at Earth's surface
B) The process by which new minerals form from existing minerals as a result of elevated temperature or pressure
C) The process by which new minerals form as a result of biological processes in living organisms
D) The process by which new minerals form as a result of precipitation from an aqueous solution
Answer:
D) The process by which new minerals form as a result of precipitation from an aqueous solution