Answer:
a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.
"his ‘steady state’ hypothesis of the origin of the universe"
Which OF THESE is a reason why a bird 'sings'?
a. To mark out its territory to others of its own species
b. To frighten other birds that may attack / eat it
c. To attract its food like worms and insects
d. To wake up other birds and animals
Quick
How do DNA and RNA differ?
Answer:
DNA is a long polymer with deoxyriboses and phosphate backbone. Having four different nitrogenous bases: adenine, guanine, cytosine and thymine. RNA is a polymer with a ribose and phosphate backbone. Four different nitrogenous bases: adenine, guanine, cytosine, and uracil.
Answer:
DNA contains the sugar deoxyribose, while RNA contains the sugar ribose. DNA is a double-stranded molecule, while RNA is a single-stranded molecule. DNA is stable under alkaline conditions, while RNA is not stable. DNA and RNA perform different functions in humans.
Explanation:
is when a system is in motion but is balanced because it experiences no net change,
A. Dynamic equilibrium
OB. A convection current
C. Static equilibrium
D. Co-evolution
Answer:
i think A
Explanation:
What releases oxygen into the atmosphere?
A. Iron-bearing rocks
O B. All living things
O C. Animals
th, D. Plants
S
how do plants use carbon dioxide
Explanation:
Plants use photosynthesis to capture carbon dioxide and then release half of it into the atmosphere through respiration. Plants also release oxygen into the atmosphere through photosynthesis.
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ASAP
If your blood becomes too diluted, what will happen to the red blood cells?
A. They become turgid.
B. They undergo lysis.
C. They undergo crenation.
D. They absorb some of the ions to balance the concentration.
Answer:
The red blood cells will burst or rupture when it is diluted and it will be one transparent and visible. ... Because water is an hypotonic solution, water from outside of the cell to the inside making the cells to continue to swell up and rupture ,a phenomenon known as haemylosis.
Answer: B
Explanation:
ITS the obvious one
What are the 2 most abundant elements found in the Earth's crust?
A. Iron and nickel
B. Carbon and silicon
C. Oxygen and silicon
D. Carbon and hydrogen
Explanation:
carbon and hydrogen
hope it's helpful and have a great day
Which of the following describes the most likely way in which two water molecules will interact?
A. A covalent bond will form between the hydrogen of one water molecule and the oxygen of the other water molecule.
B. An ionic bond will form between the oxygens in each water molecule.
C. A metallic bond will form between the hydrogens in each water molecule.
D. A hydrogen bond will form between the hydrogen atom of one water molecule and the oxygen atom of the other water molecule.
Answer:
D. A hydrogen bond will form between the hydrogen atom of one water molecule and the oxygen atom of the other water molecule.
Explanation:
The most likely way in which two water molecules will interact is a hydrogen bond will form between the hydrogen atom of one water molecule and the oxygen atom of the other water molecule. Therefore, option (D) is the required answer.
Soil is a mixture of eroded rock and: ii. rhizopus biotic iii. humus i. aquous iv. cycas v. rhizopus
Answer:
organic Matter is the mixture of soil
Question 3
Some globular proteins are water soluble, while all fibrous/membrane proteins are water insoluble.
Which of the following statements BEST explains the reason for these differences?
A
Fibrous proteins have a large number of hydrogen bonds between the amino acids in the polypeptide chains that stabilize their structures, preventing solubility in water. The globular proteins that are water-soluble do not have as many hydrogen bonds between the amino acids in their peptide chains, allowing water solubility.
B
Fibrous proteins are configured in a way that exposes the polar side chains of the amino acids on the surface of the protein, preventing solubility in water. The globular proteins that are water soluble have nonpolar side chains on the surface of the protein, allowing water solubility.
C
Some globular proteins are configured in a way that exposes the polar groups of the amino acids on the surface of the protein, allowing water solubility. Fibrous proteins have nonpolar side chains on the surface of the protein, preventing water solubility.
D
Some globular proteins are composed of more than one polypeptide chain that weakly interacts with one another, allowing water solubility. Fibrous proteins are composed of only one polypeptide chain that tightly folds, preventing water solubility.
Globular proteins are spherical proteins which are water soluble and forms colloid in water.
The best statement which will explain the reason for difference in globular protein and fibrous proteins is statement C.
C. Some globular proteins are configured in a way that exposes the polar groups of the amino acids in the surface of the protein, allowing water solubility.
Fibrous proteins have non polar side chains on the surface of the proteins, preventing water solubility.
Globular proteins are water soluble. Fibrous proteins are not soluble in water.
Amino acids chain prevents folding up so that the chain is not broken and it remains in elongated form. The correct answer is C.
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Which is not an example of an abiotic factor?
A. sunlight
B. wind
C. fungi
D. water from a stream
Answer:
C. fungi
Explanation:
Sunlight, water, and wind are considered abiotic factors.
22. An astronaut on the space station tests whether gravity affects the productivity of tomato plants. What
is the independent variable in this experiment?
When conducting an experiment, the independent variable is always the one that produces or causes an effect or reaction on the dependent variable. In the exposed situation, the independent variable is gravity.
--------------------------------------
During an experiment, you need to consider all the variables involved.
Independent (manipulated) variable: Refers to all the variables in an experiment that provoke a response in another variable. An independent variable is the one that changes or is controlled and modified to analyze how another variable responds to it. The researcher changes the independent variable to observe its effects on the dependent variable. Usually, the independent variable is represented by the X letter. In the exposed example, gravity is the independent variable, and influences the productivity of tomato plants. Dependent variable: Refers to the variable, which response depends on any change in the independent variable. It represents a quantity of something which value depends on how the independent variable is modified. The change in the dependent variable might be proportional or inversely proportional to the change in the manipulated variable. It is usually identified by the letter Y. Controlled variables are kept constant in the control groups and the experimental groups. Unlike the independent variable, the controlled variables do not influence the results. These variables do not affect the response of the dependent variable.------------------------
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What type of evolutionary adaptations did plants acquire to allow them to grow in areas that were not directly on a water source? A. Angiosperms evolved flowers, which could catch rainwater, reducing the dependence on ground water sources. B. Vascular seedless plants evolved specific structures to transport and hold fluids, reducing dependence on water sources. C. Gymnosperms evolved seeds, which they could alter to need less water. D. Non vascular plants evolved chloroplasts to allow them to get energy from the sun, instead of relying on water for energy.
Answer:
B
Explanation:
In the given scenario, vascular seedless plants evolved specific structures to transport and hold fluids, reducing dependence on water sources. The correct option is B.
What is vascular plants?A plant that basically have a specialized conducting system which entails xylem and phloem, the tracheophyte is referred to as vascular plants.
Vascular plants are widely recognized as tracheophytes. Vascular tissues are xylem and phloem for conduction of water and food respectively.
They allow plants to grow in height in the air without even drying out. Vascular plants also have roots, stems, and leaves.
Seedless vascular plants are the ones which have vascular tissue but though do not produce seeds as well as flowers.
In such vascular plants, for instance, ferns and horsetails, the plants multiplies using haploid and unicellular spores on the place of seeds.
Thus, the correct option is B.
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Which of the following statements support(s) the theory of the endosymbiotic origin of chloroplasts?
Chloroplasts have their own DNA, separate from the DNA in the nucleus.
They contain their own ribosomes to translate and make proteins.
They self-replicate and reproduce on their own.
They don't have similarities to photosynthetic prokaryotes.
I only
I and II only
I,II, and III
I, II, and IV
Answer:
C
Explanation:
According to the endosymbiotic idea, a few eukaryotic cells' organelles were previously prokaryotic microorganisms. Chloroplasts and mitochondria divide by binary fission. Therefore, option (C) is correct.
What is Endosymbiotic Theory ?According to the endosymbiotic theory, eukaryote cell organelles like chloroplasts and mitochondria descended from separate bacteria that eventually developed symbiotic relationships with other cells.
Both mitochondria and chloroplasts have circular, single-stranded DNA in addition to not having histones. Prokaryotes are the only organisms that have single-stranded, circular DNA. They contain their own ribosomes to translate and make proteins. These qualities would enable the mitochondria and chloroplasts to thrive on their own, supporting the endosymbiosis theory.
Therefore, option (C) supports the theory of the endosymbiotic origin of chloroplasts.
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An injury to the spinal cord in which section of vertebrae could cause tetraplegia?
Answer:
The nerves exiting the vertebrae in the neck area or cervical segments are referred to as C1 through C8. These nerve control signals to the neck, arms, hands, and internal organs. Injuries to these areas result in tetraplegia.
Answer:
cervical
Explanation:
“Most people with tetraplegia have significant paralysis below the neck, and many are completely unable to move. This form of paralysis is typically the product of damage high in the spinal cord, usually in the cervical spine between C1-C7. The higher the injury is, the more extensive the damage will be.”
Can someone help me answer these questions!?
6. The first tree used to divide the dinosaur into two separate groups are the structure of their hips. What are the two groups and what do the group names mean?
The two groups are Tyrannosaurus Ornithomimus and Tyrannosaurus Coelophysis which are different from one another in shape and body structure.
The word Ornithomimus means ''bird mimic,” because it resembles the bird i.e. they are toothless and had beaklike jaws while on the other hand, Coelophysis means 'hollow form' and the specie has hollow limb bones that makes Coelophysis is a lightly body dinosaur that make it a fast hunter.
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state te type of cell devision of cross section tips of onion root.
explain the relationship between small particle aerosols and areas od dense population
Answer:
Explanation:
distribution and population density in the research region of east China. ... Aerosol is defined as the scattered and small solid or liquid particles ...
The new Hazard Communication Standards provide teachers and students the right to __________ chemical hazards.
The new Hazard Communication Standards provide teachers and students the right to manipulate chemical hazards.
Chemical hazards are non-biological substances that can cause damage to health. These are used in different enterprises, companies, school, universities and laboratories for different purposes such as cleaning, disinfection, scientific experiments, among others. When handling them, employees are exposed to them and are vulnerable to harm from these chemicals.
There are many types of hazardous chemicals to be wary of, such as:
Carcinogens NeurotoxinsAcids Systemic toxins Asmogens Silica dust LeadIn the workplace, exposure to these substances represents a real occupational hazard and there must be regulations to ensure that they are safe to handle.
The Occupational Safety and Health Administration (OSHA) is the agency of the U.S. Department of Labor which determined the Hazard Communication Standards. This is a document with the necessary information to study the hazards of the chemical substances used by different employees in the companies, so that they are aware of the dangers of these substances. These employees have the right to know exactly what compounds they handle and the risks involved in their use as well as the precautions and care to be taken.
Therefore, by having these safety standards in place in schools and universities, teachers and students have the possibility and the right to handle chemical hazards safely to be able to conduct the class normally and learn what is necessary.
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Describe the life cycle
of mosquito and cockroach
Answer:
the cockroach life cycle is comprised of three developmental phases, the egg, nymph and the adult stage. Most cockroaches are oviparous — their young grow in eggs outside of the mother's body. ... These nymphs will feed and go through a series of moultings over a period of one year as they develop into adults
The description of life cycle of mosquito and cockroach is that the cockroach life cycle has been comprised of three developmental phases, the egg, nymph and the adult stage. Most cockroaches are oviparous it means they lay eggs and their young ones grow in the eggs outside the mother's body. These nymphs will be feed and go through a series of the moultings over a period of one year as they develop into adults.
What is oviparous?Oviparous is the animals that lay eggs as their young ones and Most cockroaches are oviparous it means they lay eggs and their young ones grow in the eggs outside the mother's body. These nymphs will be feed and go through a series of the moultings over a period of one year as they develop into adults.
Genetic mutation, crossing over during meiosis, polypoidy is an example of a cause of natural variation to the mechanism of natural selection. Variation shown in many ways such as physical appearance, metabolism, reproduction, fertility behavior, learning and mental ability, such variation is called as natural variation.
Therefore, The description of life cycle of mosquito and cockroach is that the cockroach life cycle has been comprised of three developmental phases, the egg, nymph and the adult stage. Most cockroaches are oviparous it means they lay eggs and their young ones grow in the eggs outside the mother's body. These nymphs will be feed and go through a series of the moultings over a period of one year as they develop into adults.
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Plant roots are more easily able to absorb ammonium that has been produced from ________.
A. nitrification
B. nitrogen fixation
Why does Pakistan experience frequent earthquakes?
A It does not experience earthquakes.
B. It lies on a convergent collision plate boundary between India and Eurasia.
C. It is located near many volcanoes and the pressure from the magma buildups causes earthquakes.
D. It lies on a divergent plate boundary between Eurasia and the Middle East.
B is the answer for this question
Explain the process of finding the volume of irregular solid in laboratory with diagram
Answer:
If the object has an irregular shape , the volume can be measured using a displacement can . The displacement can is filled with water above a narrow spout and allowed to drain until the water is level with the spout. As the irregular object is lowered into the displacement can, the water level rises.
Explanation:
easy biology question below first correct answer gets brainliest
Answer:
B
Explanation:
B.bb, because there is no dominant present.
Answer two questions in detail and get brainliest!
1.Explain what makes a scientific experiment reliable. Be sure to include at least three reasons to support your answer.
2.During research, why is it important to use peer reviewed evidence when collecting background information during a scientific investigation?
Answer:
1:When a scientist repeats an experiment with a different group of people or a different batch of the same chemicals and get very similar results then those results are said to be reliable.Reliability is measured by a percentage if you get exactly the same results every
time then they are 100% reliable.
2.The peer reviewer determines whether the introduction provides sufficient background information on the research topic, and ensures that the research question and hypothesis are clearly identifiable.
Explanation:I really hope this helped you in any way (pls tell me if I did anything wrong)
What is a similarity between the temperate climate zone and polar climate zone?
A. Both climate zones get less than 100 cm of precipitation in a year.
B. Both climate zones have average yearly temperature of around 25°C.
C. The polar and temperate climate zones have hot and dry summers.
D. They have hot summers and cold winters because they are close to the ocean.
Answer:
may be option c or b I think but I am not sure
What is a nerve’s long threadlike bundle that conducts electrical impulses?
Answer:
A nerve is actually a long threadlike bundle of dendrites that conduct electrical impulses. Dendrite word derived from the Greek word 'dendron' which means tree. They carry messages in the form of electrical impulses to cell body, there are also wire like nerves called axon.
Explanation:
Hope it helps you
have a good day dear friend
Before moving a microscope, changing slides, or putting it away you must always ____. This prevents damage to the scope.
Answer:
You must always use two hands.
Explanation:
Using two hands provides more stability when carrying the microscope. So that would lower the chances of damaging the scope. Yw >:)
Messages in your brain are transmitted by
Oa) electrons
Ob) protons
Oc) photons
Od) neurons
Answer:
neurons
Explanation:
Messages in the brain are transmitted by neurons
Neurons are used to transmit the messages to brain. The correct option is d.
What are neurons?Neurons also widely recognized as neurons or nerve cells are the basic units of the brain and nervous system, charge of receiving sensory input from the outside world.
Thys also trying to send motor commands to our muscles, and morphing and relaying electrical signals at every step somewhere between.
Neurons are in charge of transporting information throughout the human body. They help organize all of life's necessary functions by using electrical and chemical signals.
Glial cells and neurons are 2 kinds of prominent brain cells. While neurons are the most numerous in the brain, glial cells outnumber neurons in various areas.
Thus, the correct option is d.
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predict what happen to the human and the plants if the transport system are affected
I think we'll be scared and panicked and some people will die of overthinking
