Answer:
B
Explanation:
Gas exchange provides oxygen that is required for aerobic cellular respiration. Aerobic respiration produces more ATP molecules than anaerobic respiration. This is because oxygen acts as the ultimate proton acceptor (in the Krebs/Citric cycle) in the matrix of the mitochondria to form water as the waste product. This allows a proton motive force to be created in the mitochondria that is harnessed by ATP synthase to produce ATP molecules.
Gas exchange provides the molecules necessary for cellular respiration and efficient ATP synthesis.The correct option is B.
Cellular respiration is the process by which biological fuels are oxidised in the presence of an inorganic electron acceptor, such as oxygen, to drive the bulk production of adenosine triphosphate (ATP), which contains energy. Cellular respiration may be described as a set of metabolic reactions and processes that take place in the cells of organisms to convert chemical energy from nutrients into ATP, and then release waste products.
The reactions involved in respiration are catabolic reactions, which break large molecules into smaller ones, producing large amounts of energy (ATP). Respiration is one of the key ways a cell releases chemical energy to fuel cellular activity.During cellular respiration, there is exchange of gases which takes place.
Thus, option B is correct.
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Which steps below will ensure laboratory safety
during the investigation? Check all that apply.
plugging in the electrical cord with dry hands
recording observations in the data sheets
checking the glass slides and cover slips for chips prior to making a wet mount
switching to high power after focusing under
low power
carrying the microscope with both hands
A. Plugging in the electrical cord with dry hands
C. Checking the glass slides and cover slips for chips prior to making a wet mount
D. Switching to high power after focusing under low power
E. Carrying the microscope with both hands
A. Plugging in the electrical cord with dry hands to avoid electric shock.
What is lab safety?
A laboratory poses potential risks due to exposure to corrosive and toxic materials, flammable solvents, high pressure gases, explosive chemicals and dangerous microbes. A little care and adherence to prescribed safety guidelines will help avoid laboratory mishaps.
C. Checking the glass slides and cover slips for chips prior to making a wet mount to view clear structures.
D. Switching to high power after focusing under low power in the microscope for better reading.
E. Carrying the microscope with both hands which avoid breakage.
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A sample of a population should be large enough to:
A. justify the cost of the items needed for the simulation.
O
B. include more than half of the entire population.
O
C. span the full spectrum of a population's genetic variation,
O
D. generate a very large amount of data.
A sample of a population should be large enough to span the full spectrum of a population's genetic variation (Option C).
What is a sample?In science, a sample is a representative part of the population that is tested during the experimental procedure.
The sample in genetics should cover all variation in order to be completely representative of the population.In conclusion, a sample of a population should be large enough to span the full spectrum of a population's genetic variation (Option C).
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1.
If the sequence on a DNA molecule was CCTAG, the complementary sequence on the mRNA would be:
GGAUC
GGUTC
GGATC
UUATU
Answer:
GGAUC
Explanation:
C pairs with G
T pairs with A
A pairs with U
G pairs with C
CCTAG -> GGAUC
Many people try to eliminate fat from their diets. Which is one reason it is necessary for humans to eat fat?
A. Eating fat is the fastest way to get energy.
B. Fat eliminates triglycerides from the body.
C. Saturated fats clear out the blood vessels.
D. Fat helps nerves transmit signals.
please helppp, this is for APEX in summer school.
Answer: Option D
Explanation:
The fat which is found inside the body helps in providing insulation to the body form the outer environment. It also serves many important functions in the body such as protection from cold by providing heat to the body.
The fat is also found in the myelin sheath of the neurons. This helps in saving the energy which is transmitted from one neurons to another neuron.
It provides a long route for signal transmission without wasting energy by providing insulation.
Hence, the correct answer is option D
Fats are essential in the human diet as they help in the formation of the insulating layer around nerve cells, promoting efficient transmission of signals across neurons.
Explanation:It is vital for humans to consume fats in moderation because they play fundamental roles in the body. The correct answer to the question is option D: Fat helps nerves transmit signals. This is because fats participate in forming the myelin sheath, a fatty insulating layer protecting our neurons (nerve cells) and aiding in the swift and efficient transmission of signals in our nervous system. Without enough fat in our diet to facilitate this, our neurological health might be compromised.
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18. Over time, how do sand dunes tend to migrate?
a. perpendicular to the movement of the wind
b. in the same direction as the wind blows
c. toward the wind
d. in random directions
Answer:
in the same direction as the wind blows
Explanation:
The dunes are hills formed by grains of sand held together by the action of wind or water. Over time, as sand dunes tend to migrate in the same direction as the wind blows.
They have a larger side that is eroded (windward) and a smaller, steeper side (leeward) where deposition of eroded material occurs. Through this mechanism of erosion and deposition the dunes are considered highly dynamic, "moving" over time.
What was Dr. Willem Johan Kolff’s first step in using the scientific process to invent the hemodialysis machine?
He built the machine and tried it with various patients, collecting data about its effectiveness.
When a patient’s kidneys failed, he wondered if it would be possible to perform kidney functions with an external machine.
He researched and collected data about numerous patients who exhibited symptoms of kidney failure.
He drew conclusions from studies of various symptoms of kidney failure, and drew a design for the ideal external blood-processing machine.
Answer:
When a patient’s kidneys failed, he wondered if it would be possible to perform kidney functions with an external machine.
Explanation:
The scientific process always begins with a hypothesis. The whole process will be dedicated to testing the hypothesis, whether it validates or invalidates it. The next step is to do more research about it to find relevant literature or researches that will help the overall design of the process or investigation. Only then will they proceed to methods into how to conduct the investigation or how to start designing a prototype. After this, is data gathering through testing. When data is gathered, it would be analyzed then a conclusion will be drawn.
Here is your scenario in the correct order from start to end.
1. When a patient’s kidneys failed, he wondered if it would be possible to perform kidney functions with an external machine.
2. He researched and collected data about numerous patients who exhibited symptoms of kidney failure.
3. He drew conclusions from studies of various symptoms of kidney failure, and drew a design for the ideal external blood-processing machine.
4. He built the machine and tried it with various patients, collecting data about its effectiveness.
Answer:
B.
Explanation:
A scientist is trying to determine how closely related a moth species is to four other moth species. He examined the DNA of each species and compared it to the study subject. He then created this table. Species # of genetic differences Species A 12 Species B 3 Species C 14 Species D 28 Which species is most closely related to the original moth species? species A species B species C species D
Species B is the most similar to the original moth due to its lack of differences in DNA. We know that 12, 14, and 28 are all greater than 3 (and represent the amount of genetic differences), which makes B the only one with a high quantity of similarities.
I hope I helped!
Species B is the most similar to the original moth species and is denoted as option B.
What is DNA?
This is known as deoxyribonucleic acid and contains the genetic components of an organism.
The lack of differences in DNA is what makes species B the only one with a high quantity of similarities.
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After a signal is transmitted from the eyes through the optic nerve, which part of the brain processes the visual information?
A. The limbic lobe
B. The occipital lobe
C. The frontal lobe
D. The temporal lobe
Answer:
B. The occipital lobe
Explanation:
The brain receives signal or information for vision through one of the five senses, the eyes. The brain processes the visual information in the occipital lobes of the cerebrum. The occipital lobes are one of the four main lobes of the cerebral cortex. The eyes transmit this information to the visual cortex. The visual cortex takes processes the information so, we are able to see the things.
Which equation best represent the process of photosynthesis
Answer:
6 CO2 + 6 H2O → C6H12O6 + 6 O2
Explanation:
Answer:
The answer is: 6 CO2 + 6 H2O → C6H12O6 + 6 O2
Explanation:
Photosynthesis is the process in which the energy of light is converted into chemical energy in the form of sugars. In a process driven by the energy of light, glucose molecules (and other sugars) are created from water and carbon dioxide, while oxygen is released as a byproduct.
Light
6 CO2 + 6 H2O -------------- → C6H12O6 + 6 O2
Nutrients (Sugars)
The answer is: 6 CO2 + 6 H2O → C6H12O6 + 6 O2
A plant that loses too much water from its cells will eventually __________.
A.
become taller
B.
find water from another source
C.
make its own water
D.
wilt and die
Answer:
D. Wilt and die
Explanation:
A plant that loses to much 4 from its cells will eventually wilt and die.
This is because plants needed water to live and let photosynthesis take place.
Hello There!
A plant that loses too much water from its cells will eventually "WILT AND DIE"
A plant needs the water in its cells to survive. If this does not happen, the plant will slowly die.
Which is not a true statement about goals? Choose all that apply.
Accomplishment come from the completion of a goal.
Goals are measurable.
Goals are mostly for the purpose of learning
Accomplishing goals means you are mature.
Final answer:
Statements that goals are mostly for learning and that achieving them signifies maturity are not true. Goals have various purposes, and maturity is a complex trait. SMART goal setting is crucial for effectiveness.
Explanation:
The statements about goals that are not true are that 'Goals are mostly for the purpose of learning' and 'Accomplishing goals means you are mature.' While learning can be a byproduct of achieving goals, goals encompass a broad range of purposes including personal, financial, and professional ambitions. Additionally, the maturity of an individual is not solely determined by their ability to accomplish goals since many complex factors affect both goal attainment and maturity.
Setting SMART goals is important for clarity and effective goal attainment. These goals should be Specific, Measurable, Achievable, Relevant, and Time-bound. To make goals measurable, you should determine the criteria to track progress and establish how you'll know when the goal is accomplished. Moreover, breaking down your goals into feasible action steps with target dates can greatly increase your odds of success.
Societal views on adulthood milestones may differ, but completing goals within personal and professional domains remains key to individual development. However, the completion of certain milestones does not define adulthood or maturity in its entirety.
Final answer:
Not all goals are primarily for learning as they can also be for other purposes, and accomplishing goals is not necessarily a sign of maturity. Goals should be set using the S.M.A.R.T. framework to be measurable and attainable.
Explanation:
The statements about goals that are not true include: 'Goals are mostly for the purpose of learning' and 'Accomplishing goals means you are mature.'
Goals can indeed be for the purpose of learning, which are known as mastery goals, but they can also be for other purposes such as performance or career advancement. While mastery goals focus on acquiring knowledge and self-development, performance goals are often about demonstrating competence to others or achieving a certain grade or accolade. Furthermore, mastery goals are associated with a deeper engagement and sustained interest in the learning material.
Accomplishing goals does not necessarily equate to maturity. Completing a goal is an achievement, but maturity is a broader concept related to one's ability to handle complexities, understand different viewpoints, and demonstrate responsibility in multiple aspects of life.
Measurable goals are an important aspect of the goal-setting process. A goal should be specific and have criteria for measuring progress, which provides a clear indication of success once the objective is achieved. The S.M.A.R.T. framework is often used to define goals that are Specific, Measurable, Achievable, Realistic, and Time-targeted. This structure helps in planning and tracking the progress towards attaining the goal.
Match each medication with its description.
antiacids- acid in stomach
anticoagulants- reduces blood clots
antiemetics- prevent vomiting
The diagram shows structures that represent different levels of organization in a human. What is the second smallest level of organization? 1.W 2.X 3. Y 4.Z
Answer:
The correct answer is option 4. Z
Explanation:
Given diagram representing a different level of organization where W showing organ which is the third smallest organization made up of different tissues.
X showing an excretory system that consists of several organs.
Y exhibits a cell that is the smallest organization in the human body.
Z is a tissue that is made up of cells joined collectively and the second smallest level of organization in the human body.
Thus, the correct answer is option 4. Z
Answer:
its Z
Explanation:
What provides instructions to cells in forming an organ?
O A. DNA
B. Globular proteins
O
C. Differentials
O
D. Stem cells
Answer: DNA source apex
Explanation:
DNA
period okurrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr
brian made this table to organize his notes on changes of state
change of state energy change
melting gain
freezing lose
deposition gain
condensation lose
Answer:
B. Deposition Gain
Explanation:
Which structure is the site of photosynthesis within a plant
Answer:
Chloroplasts
Explanation:
Chloroplasts are the double membrane-bound organelles that are mostly present in leaves of the plants. Chloroplasts have chlorophyll pigments in their thylakoid membranes and enzymes for the Calvin cycle in the stroma.
Presence of chlorophyll pigment allows the Chloroplasts to serves as a site for photosynthesis as these pigments trap the sunlight required for the process.
Photosynthesis primarily takes place in the chloroplasts within the mesophyll layer of leaves, where the pigment chlorophyll in thylakoid structures captures light energy. Gaseous exchange required for photosynthesis is regulated by stomata and guard cells on the leaf surface.
The site of photosynthesis within a plant is the chloroplast, which is primarily located in the mesophyll layer of leaves. These chloroplasts contain disc-shaped structures known as thylakoids, which are grouped into stacks called grana. The thylakoids house the green pigment chlorophyll, which is essential for capturing light energy during the process of photosynthesis. Other plant parts like stems can also be photosynthetic, but the bulk of photosynthesis tends to occur in the leaves due to their specialized structure that facilitates water and air movement.
Gaseous exchange, important for the photosynthetic process, occurs through the stomata (singular: stoma) found mainly on the underside of the leaf. Each stoma is accompanied by guard cells, which regulate the opening and closing to balance gas exchange and water loss. This regulation is crucial to maintain homeostasis within the plant while it carries out photosynthesis.
list 4 characteristic of the life of that a flea, bacteria and elm tree
Answer:
Feeding, reproduction, respiration and excretion.
Characteristic features of Flea, Bacteria and Elm tree
Flea:
1. Flea is small and wingless insects.
2. It survives as parasite on the body of mammals and animals.
3. It acts as carriers of many disease.
4. It gets its nourishment from the blood.
Bacteria:
1. It is a single celled prokaryotic organism.
2. It is both harmful as well as beneficial to the other living organism.
3. It is a member of decomposer.
4. They are microscopic in appearance.
Elm tree:
1. It is a deciduous tree.
2. It is life span is approximately 300 years.
3. It is native to central Asia.
4. It act as source of food for various living organisms.
Root vegetables, such as carrots, are classified as what type of root system? A. Dermal Root System B. Nutritious root system C. Taproot system D. Fibrous root system
Answer:
C. Tap root system
Explanation:
The taproot is the primary root that is derived from the radicle directly. This primary root has many lateral roots originating from it. Root vegetables such as carrots are classified as tap roots.
These root vegetables are fleshy in nature. The taproot of carrot is modified to store the food. Storage of food makes the tap roots of these vegetable swollen in appearance. Another example of root vegetable is turnip which is also a taproot.
Answer:
Tap root
Explanation:
Penn foster
Why do mutations in genes affect traits?
O
A. Genes determine what type of mutagens an organism has.
O
B. Genes produce proteins that cause traits.
O
C. Genes affect how many chromosomes an organism has
O
D. Genes code for carbohydrates that influence traits.
Answer:
B. Genes produce proteins that cause traits
Explanation:
A P E X
Which of the following is not a component of a normal experiment?
A. Validity group
B. Dependent variable
C. Independent variable
D. Control group
Answer:
B. Dependent variable
Explanation:
Answer:
A. Validity group
Explanation:
An experiment is a type of scientific research in which the researcher manipulates and controls one or more independent variables and observes the variation in the dependent variables concomitantly with the manipulation of the independent variables.
An experiment is composed of variables and groups. In the variables, you can mention:
The dependent variable is one that can be manipulated to get the result. The independent variable is that which has influence on another variable, determining or affecting the result observed in the second, with precision and regularity. It is usually manipulated by the researcher in his experiments in order to seek to establish their relation and influence on the result of an observed phenomenon.In a scientific experiment, besides the variables we can notice the presence of groups (two samples) that are compared to test a hypothesis: the control group (also called test group or testimony) and the experimental group.
what type of insects invade a decaying body
Answer:
Blowfly
Explanation:
The double helix structure of DNA
Answer:
The double-helix structure of DNA: Watson, Crick, Franklin
The chemical composition of proteins: Mulder
The monomer of nucleic acids: Levene
During a natural disaster, part of a plant was damaged. If the plant can no longer grow, and produce new root cells, which part of the plant likely suffered damage?
Final answer:
Damage to the plant's meristems, specifically the roots, is likely the cause of its inability to grow and produce new root cells. The roots are key for absorbing water and nutrients, and when they are damaged, the plant may not be able to survive due to restricted resource uptake.
Explanation:
When a plant can no longer grow or produce new root cells, it is likely that the meristems, particularly the root meristems or root apical meristems, suffered damage during the natural disaster. Meristems are regions in the plant where cells are capable of dividing and differentiating into various types of plant cells. If root meristems are damaged, the plant cannot produce new root tissue, which affects its ability to absorb water and nutrients from the soil. This can lead to the entire or major portion of the plant dying because the roots are essential for plant survival, anchoring the plant in the soil and facilitating the uptake of vital resources.
Generally, damage to the roots can come from various factors such as extreme temperatures, physical trauma, or chemical exposure. Cold damage to the root system, for example, can blacken or spongify roots and prevent new growth, which becomes evident by restricted water and nutrient uptake, leading to symptoms such as defoliation or small leaf size.
Other than bacteria, which factor leads to nitrogen fixation? A. Lightning B. Flood C. Rain
Answer:
A. Lightning
Explanation:
Nitrogen is very fundamental for a wide range of life activities in both plant and animals.
Lightning which accompanies thunder during rain storm and other weather phenomenon aids the release of atmospheric nitrogen for life processes. The energy that accompanies a lightning event is mostly electrical in nature. This electrical energy is huge and very massive. As the lightning interacts with free nitrogen molecules in the atmosphere, the molecule is broken down. The free nitrogen which results then combines with oxygen in the atmossphere to form oxides of nitrogen. When oxides of non-metals dissolves in rain water, they make the water rich in nitric acid and can be brought to the biosphere for use by plant and animals.
A student sees several ants walking up a wall following the exact same trail that an ant took earlier. She wants to apply the scientific method to determine how the ants detected the trail. Which of these steps would come first in her application of the scientific method?
Perform an experiment by cleaning the scent away from part of the trail.
Draw a conclusion that the ants follow a scent trail.
Make a prediction about what the ants will do after she cleans away part of the trail.
Hypothesize that the ants are following a scent trail that the first ant left.
Answer:i think its answer C
Explanation:
Answer:
Hypothesize that the ants are following a scent trail that the first ant left.
Explanation:
The scientific method can be defined as the manner or set of ground rules employed in a scientific investigation in order to obtain the most reliable results as possible. However, the scientific method is somewhat more subjective, or implicit, in the scientific way of thinking than a manual with explicit rules about how the scientist or another should act.
Generally, the scientific method includes some steps such as observation, hypothesis formulation, experimentation, interpretation of results and, finally, conclusion. The student, exposed in the question, already made the observation, when he realized that ants do exactly the same track as an ant did before; The next step in the scientific method this student must do is to create a hypothesis. This student's hypothesis should ask whether ants are following a scent trail the first ant left.
In 2014, the birthrate in Australia was 13 per 1000 people. In the same year,
the death rate in Australia was 7 per 1000 people. What was Australia's
approximate growth rate in 2014?
O
A. A decrease of 2 per 1000 people
O
B. An increase of 6 per 1000 people
O
c. A decrease of 20 per 1000 people
O
D. An increase of 91 per 1000 people
SUBMIT
Answer:
13 were born and 7 died.
The difference is: 13 - 7 = 6
The answer would be B. an increase of 6 per 1000 people.
Answer:
B. An increase of 6 per 1000 people
Explanation:
Birth rate of a population is the total live births that takes place per 1000 people in a population in a year. Death rate of a population is the total number of deaths that occur per 1000 people in a population.
A difference between the birth rate and death rate gives the growth rate of a population. Growth rate gives the number by which the population is increasing or decreasing. Here, the birthrate was 13 per 1000 people and death rate was 7 per 1000 people. So the net growth rate was an increase of 6 per 1000 people.
Because water has a high heat capacity, areas around lakes in the summer
tend to have a climate than areas farther away,
Answer:
comparatively cooler
Explanation:
The land areas and water bodies get heated during the summer due to the increasing amount of incoming solar radiation. The water bodies like oceans, seas, and rivers take more time to heat as they can reflect some amount of radiation back to the atmosphere and also it takes a lot of time to cool.
In the case of areas near a lake and away from the lake, the areas near the lake will be comparatively cooler than the areas that are away from the lake. It is because the water in the lake is quite less in comparison to the ocean bodies, so the water will be heated at a faster rate and it will reflect some amount of light also, thereby the places will be cold less warm.
But away from the lake, the areas will absorb more heat as it cannot reflect the solar radiation back into the atmosphere. So these places will be warmer.
Hence, the areas near the lake will be cooler than the areas away from the lake.
Ethylene, a plant hormone, promotes the ripening of fruit.
TRUE or FALSE
Answer:
Cytokinins promote cell division and are produced in growing areas of plants.
ethylene is a gas that is produced by ripening fruits.
the answer is TRUE
Based on what you have learned, what kinds of living and nonliving things do you think a marine biologist studies? What are some questions that biologists might ask about the living things they study?
Answer:
A marine biologist study organisms from minute phytoplanktons to huge and gigantic blue whale. A marine ecosystem contains thousands of species of organisms that are study topic of a marine biologist.
Marine biologists study the interaction of these species with their environment. The non-living things that scientific study is about the effect of change in temperature, pH, oxygen quantity, light, acidity, salinity on marine species.
Some questions that biologist ask about living things they study are :
- how many marine species are in the endangered list?
- what is the role of a species in its ecosystem?
-how the extinction of a species affects the food chain in the ecosystem?
Identify the product of genetic engineering.
Hello. This question is incomplete. The full question is:
"Identify the product of genetic engineering. :
inserting a spider’s silk gene in a goat’s DNA to weave silk threads
choosing livestock for mating to pass on their genes for being large to offspring
intentionally pollinating two strawberry plants that produced sweet berries
fishing for large fish, leaving small fish to pass on their genes to offspring"
Answer:
inserting a spiders silk gene in a goats DNA to weave silk threads
Explanation:
Genetic engineering is the branch of science that manages to gather several techniques for the purpose of manipulating the genes of any organism from artificial experiments. This manipulation process causes such elements to be duplicated, transferred or even isolated from the original genes. With this, the objective is to produce beings with improved genetics to improve functions or even produce some substances that can bring benefits to man. An example of the use of genetic engineering occurs when a scientist wants to insert a spider's silk gene into a goat's DNA to weave silk threads
Genetic engineering involves altering an organism's genotype to achieve desirable traits, such as creating Roundup-ready soybeans and human insulin through genetic modification.
Genetic engineering involves the alteration of an organism's genotype using recombinant DNA technology to achieve desirable traits. One key product of genetic engineering is the creation of Roundup-ready soybeans, which are genetically modified to be resistant to the herbicide Roundup. Another important product is human insulin, which is biosynthesized by genetically engineered microorganisms.