Answer:
Scientists have calculated the age of our planet to be approximately 4.5 billion years.
Inside a muscle fiber, what triggers sarcomeres to contract?.
Answer:
It would be an Impulse.
Explanation:
When an impulse reaches the muscle fibres of a motor unit, it stimulates a reaction in each sarcomere between the actin and myosin filaments.
Does this help you??
Answer:
A sudden rise in cystolic Ca2+
The process in which nitrogen circulates and is recycled is called.
Answer:
nitrogen cycle
Explanation:
The process in which nitrogen circulates and is recycled is called.
How does a possum in Florida adapt to the winter season?
Answer:
They spend the winter in dens. These dens are dry and safe for them to stay in, while the harsh winter storms rage above.
I hope this answers your question! Have a wonderful day.
Answer:
they find a den dunno how, but they do and wait it out like a wise man.
Explanation:
In an ecosystem that is not altered by humans or environmental disasters, a population
will remain close to carrying capacity. This is due to what factors?
Species competition and predator/prey relationships
Drastic decline in producers
Introduction of a new species
Unlimited food and water resource
Answer:
I think it's Species competition and predator/prey relationships
Explanation:
Hopefully this helps :)
wind is the horizontal movement of air caused by differences in air pressure | true or false
Wind is the movement of air produced by variations in temperature or pressure. There is a pressure gradient where there are pressure variations between two points, over which air moves: from the high pressure zone to the low pressure region.
A food allergy is a reaction that occurs when the _____ system reacts to a harmless substance in food, such as a protein that does not undergo digestion.
A food allergy is a reaction that occurs when the body system reacts to a harmless substance in food, such as a protein that does not undergo digestion
Which of the following farming approaches can grow food crops with less land use?
a. organic farming
b. vertical farming
c. industrial farming
d. biodynamic farming
Answer:
B. vertical farming
The farming approach that can grow food crops with less land use is option b, or "vertical farming," as it is an innovative farming approach that involves growing crops in vertically stacked layers.
What is vertical farming?Vertical farming is an innovative agricultural technique that involves growing crops in vertically stacked layers using artificial lighting and a soilless medium. The plants are grown in a controlled environment where all aspects of the growth process, such as temperature, humidity, and lighting, are carefully managed to optimize plant growth and yields, and vertical farming systems can be located in urban areas or other locations where land is limited or expensive. By growing crops vertically, the amount of land needed to produce a given amount of food is greatly reduced as compared to traditional farming methods that require large amounts of horizontal land.
Hence, the farming approach that can grow food crops with less land use is option b, vertical farming.
Learn more about vertical farming here.
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Climate is defined by all of the following except for:________.
a. the state of the atmosphere at a specific time and place
b. the state of the atmosphere averaged over time at some place
c. governs fresh water supply, type of crops, distribution of plants and animals
d. is commonly a 30 year average of weather elements e. includes extremes in weather
If the U.S. population is in Hardy-Weinberg equilibrium, approximately what percent of the population are heterozygous carriers of the recessive PKU allele
Answer:
136
Explanation:
the US is harder than the PKU population of the alleluia
_______, a dystonic reaction that results in muscle spasms in the neck, can be very painful for the client.
I think, Torticollis (I'm not completely sure)
Hope this helps!
What type of growth does the following statement describe?
The number of individuals of a population increases drastically in very little time- many
more births than deaths are occurring.
Logistic Growth
Exponential Growth
Age Structure Growth
Declining Growth
Answer:
Logistic Growth is the answer.
Please help this is due 9 hours
Scientists often use controlled experiments to answer questions.
Choose the three correct statements about controlled experiments.
A) No changes are made to a test group in an experiment.
B) A control group is used for comparison to other groups.
C) Only one change can be made per test group in an experiment.
D) Changes can only be made to the control group in an experiment.
E) A controlled experiment must have a control group and test group(s).
Answer:
B) A control group is used for comparison to other groups.
E) A controlled experiment must have a control group and test group(s).
C) Only one change can be made per test group in an experiment.
Gated ion channels for sodium and potassium open and close in rapid succession, causing the neuron to depolarize and then return to its normal resting level, during each:
Given what we know, we can confirm that this process happens in between each action potential.
What is an action potential?The action potential is the rapid polarization and depolarization of cells and cell membranes when they receive an impulse. In this case, the action potential is used to open and close the gated ion channels for sodium and potassium.
Therefore, we can confirm that gated ion channels for sodium and potassium open and close in rapid succession, causing the neuron to depolarize and then return to its normal resting level, during each action potential.
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What forms of hydrogen and oxygen are MOST
common on Earth?
A. Solid
B. Gas
C. Liquid
D. Plasma
Answer:
B
Explanation:
Hydrogen and Oxygen are the most abundant gases, being the first, and third most abundant.
Hope this helps, googIe only wanted to give me explanations on why Hydrogen is the most common element in the universe :/
The form of hydrogen and oxygen that are most common on Earth's surface is known as Gas. Thus, the correct option for this question is B.
What is the difference between hydrogen and oxygen?The difference between hydrogen and oxygen is that oxygen significantly contains eight electrons and eight protons while hydrogen contains only one electron and one proton. Oxygen is present in 21% of the earth's atmosphere, while hydrogen is present in 0.03% which is negligible.
According to the context of this question, oxygen is the first and most abundant gas in the earth's atmosphere and hydrogen is the third most abundant gas.
They are also present in the liquid and solid states but are in negligible amounts when treated with abnormal conditions like lower temperature and freezing.
Therefore, gaseous forms of hydrogen and oxygen are most common on Earth's surface. Thus, the correct option for this question is B.
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Which of the following statements about Mendel's breeding
experiments is correct?
Answer:
yes
Explanation:
plato
An individual of genotype TtFFgg mates with an individual of genotype ttFfgg. About how many of their 100 offspring would you expect to be heterozygous for all three traits
Answer:
0
Explanation:
Heterozygous means that they have an allele for both traits and is in the form (Aa) meaning they have both the dominant and recessive trait.
We notice that the third trait, represented by 'g', is in the form gg for both individuals. Since they are both lowercase and the same allele, they are both hom0zygous for that trait, meaning there is no way the offspring can get a dominant trait to make their genotype Gg.
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hello humans ~
Based on the given statements, choose the correct option.
Statement 1: Amoeba and WBCs use pseudopodia for locomotion.
Statement 2: Amoeba and WBCs are both capable of independent existence.
Statement 3: Amoeba and WBCs can change their shapes.
Statement 4: Amoeba and WBCs have cell membrane.
A. Statement 3 is incorrect.
B. Statement 1 and 2 are incorrect.
C. Statement 1, 2, 3 and 4 are incorrect.
D. Statement 4 is incorrect
Answer:
amoeba and WBCs can change their shape
Explanation:
Amoeba cells and white blood cells can change their shapes. Amoeba consists of pseudopodia also known as the false feet. White blood cells can engulf or kill pathogens by changing their shape.
Hope it helps!!!brainliest pls!!!The ____ is an early type of photographic process.
Which Term means source of energy?
A. Carbohydrates
B. Carbon
C. Proteins
D. Lipids
E Nucleic acid
Some body please help me
Answer:
D. Lipids
Explanation:
A lipid is any of various organic compounds that are insoluble in water. They include fats, waxes, oils, hormones, and certain components of membranes and function as energy-storage molecules and chemical messengers.
Lipids are an efficient source of energy (9kcal per gram) that the body stores in relative abundance. They also play an important role as building blocks for cell membranes, hormones, and physiologically active substances.
Which activity of E. coli DNA polymerase I is responsible for proofreading the newly synthesized DNA
Answer:
Find you answer below:
Explanation:
5′ to 3′ exonuclease activity.
People tint windows dark to encourage __________.
transmission
absorption
reflection
transfusion
Answer:
absorption
Explanation:
dark hues of colour are generally used to absorb heat while since they absorb heat better than white
explain how genetic engineering of plants and animals can be both beneficial harmful to the environment and to people.
Answer:
Genetic engineering of both plants and animals can cause food to be more abundant and can restore nitrites to soil in the case of plants and animals can create more stable environments by eradicating invasive species, however, there are concerns about improperly modified crops causing cancer in humans, they may overtake the genetically "pure" crops in the area, and animals have the concern of ethics and cancer.
Explanation:
Genetic engineering is generally seen as the future of food. It can serve as a cure for world hunger, causing enough food to be produced in a small enough space to provide for most of the world and causing plants to adapt to inhospitable growing conditions, however, there are concerns. For one, when genetically modifying animals, there may be the concern of how much body mass you can ethically put on an animal before it becomes torturous. You also have to worry about animals genetically processed to produce more meat developing cancerous growths due to their predisposition to gain more mass quickly, however this can be remedied. Animals, on the positive end, can be designed to feed off of invasive, harmful species. Plants may overtake their genetically "pure" cousins, however that is not necessarily a bad thing, as plants are equipped to evolve anyway, and it's quite possible you're just giving the plants a head-start.
STR Probability
Katie has 2 peaks in the D351356 STR. 1 peak in the VWA STR, and 2 peaks in the FGA STR. The frequencies of these STRs are below.
D351356
W
FGA
(17) 0.1616
(16) 0.186
(21) 0.1799
(18) 0.1616
(24) 0.1463
Calculate the probability of this combination ——-
and the frequency of occurrence in the population ———-
Answer:
this question has a horrible explination
Explanation:
the answers dont even match up with the question
From the graph, how can water's high specific heat capacity be observed? A) The ocean surface temperature and the land surface temperature rose at the same rate over time. B) The ocean surface temperature rose faster than the land surface temperature over the time period. C) The land and ocean surface temperatures stayed about the same during the first part of the time period. D) The ocean surface temperature did not rise as quickly as the land surface temperature over the time period.
1.Which type of fresh water is at risk of increased salinity as earth warms?
Glaciers
mountain
streams
coastal
lakes
snowpacks
Answer: Coastal Lakes
Explanation: I took the assessment:)
The type of freshwater that is at risk of increased salinity as the earth warms is : Coastal lakes
What are coastal lakes ?Coastal lakes are water bodies which occur in Basins and are separated from larger water bodies such as oceans and seas by a narrow lands. They run parallel to the shore are mostly likely at the risk of increased salinity as the earth warms and also due to their proximity to salty waters.
Hence we conclude that The type of freshwater that is at risk of increased salinity as the earth warms is : Coastal lakes.
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At the end of meiosis I, two cells have been produced.How many replicated chromosomes are in each of these cells?
Answer:
23
Explanation:
At the end of meiosis-I, two daughter cells are formed having half the number of chromosomes present in diploid cell undergoing meiosis. Each cell has half the number of chromosomes present in the diploid cell.
helper T cell provide activation to …….
A- the pathogen
B- B and TC cells
C- the bone marrow
D- thymus gland
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Here's the Answer ~
The Helper T cell provide activation to B. [ B and TC cells ]
How does weather differ from climate?
A
Weather can change, but climate can't.
B
Weather and climate are the exact same thing.
C
Weather describes precipitation; climate describes temperature.
D
Weather is measured from day to day; the climate is the average weather over a long period of time.
Answer:
d
Explanation:
Weather is constantly changing for example it is raining today however, tomorrow it will be sunny and hot. On the contrary, climate is the weather over time. For example, if it is usually hot most days then the climate is hot. If it only hot that day then it is weather, if it was hot for the past 5 months (as an example) then it is climate. Hope this helps.
Answer:
D
Explanation:
Weather is measured from day to day; the climate is the average weather over a long period of time.
The beginning of the Cambrian period marks an important event in animal evolution - the appearance of organisms with ________.
Answer:
The beginning of the Cambrian Period is marked by the evolution of hard body parts such as calcium carbonate shells. These body parts fossilize more easily than soft tissues, and thus the fossil record becomes much more complete after their appearance.
According to the author, what is the main reason for the decrease in trillium in the forest? What evidence does she give to support her claim?
Answer:
the large number of deer in the forest that are eating the trillium
Explanation:
Answer:
The main reason for the decrease in trillium is the large number of deer in the forest that are eating the trillium.
Explanation:
The author cites a research study performed by scientists as evidence to support her claim.