Answer: C.) steady state theory
Explanation:
Steady State Theory is based on the so-called "Perfect Cosmological Principle," according to which the Universe is homogeneous, isotropic and immutable. This hypothesis did not deny the expansion of the universe but rather believe in the continuous production of matter to counterbalance the expansion observed, keeping the average density constant. This theory was proposed by Herman Bondi, Thomas Gold, and Fred Hoyle, in 1948. The steady-state theory has lost almost all its adherents when it was discovered the cosmic background radiation, which this theory could not explain.
Select all that apply.
How are protists different from bacteria and archaea?
They are at least ten times larger.
They can reproduce asexually.
They are eukaryotes.
They consist of both single- and multi-celled organisms.
They have flagella to move.
Ans.
Protists are unicellular or multicellular eukaryotic organisms, such as amoeba, paramecium, and euglena. Protists may be heterotrophic or autotrophic as some protists can synthesize their own food by using sunlight.
Generally, eukaryotic cells are ten times larger than prokaryotic cells. It means protists are also 10 times larger than bacterial cells.
Thus, correct options are:
-They are at least 10 times larger.
-They are eukaryotes.
-They consist of both single- and multi-celled organisms.
Protists are different form bacteria as bacteria are single-celled, prokaryotic organisms. Thus, the correct options are 'they are eukaryotes' and 'they consist of both single- and multi-celled organisms.
which parts of the geosphere are not included in the lithosphere?
a)tectonic plates and faults
B) the mantel and core
c) the crust and underlying rock layers
D) soil and bedrock
(one correct answer)
Answer: B) the mantel and core
Explanation:
The lithosphere is the hard portion of the earth crust. It includes the portion above the mantle and the crust. It is covered on two sides from the atmosphere above and the asthenosphere ( upper part of the mantle) from the below. The geosphere is the part of the earth which lies below the earth crust. It includes the mantle and the core regions.
On the basis of the above explanation, B) the mantel and core is the correct option.
What are abiotic factors? how can they affect the population dynamics? give some examples?
Why are the terms dominant and recessive misleading?
both ADP and atp contains which of these sugars
A adenine
B ribose
C glucose
D guanine
What factors can shift Temperature regulation requiring feedback and homeostatic processes
What are the monomers (building blocks) of a dna molecule? amino acid
b. polypeptide
c. nucleotide
d. nitrogenous base?
Answer:
nucleotide are the monomers, or small units, used in the synthesis of DNA molecules.
Explanation:
What are the primary effects of calcitriol on the body? check all that apply?
Calcitriol has several primary effects on the body, including promoting calcium absorption, maintaining serum calcium and phosphate levels, and supporting bone health and other vital functions.
Explanation:The primary effects of calcitriol on the body include stimulating the intestines to absorb calcium from digesting food, promoting the absorption of calcium and phosphate from the digestive tract, and indirectly increasing calcium uptake by the small intestine.
Calcitriol is vital for maintaining normal serum concentrations of calcium and phosphate, which are important for bone health, muscle contraction, hormone secretion, and neurotransmitter release.
Inadequate levels of calcium can lead to disorders like osteoporosis and osteomalacia in adults and rickets in children.
Calcitriol a) increases blood concentrations of calcium and c) Increase blood concentration of phosphorus by enhancing their absorption and reabsorption in the body. The effects are crucial for maintaining bone health and overall mineral balance.
Calcitriol, the active form of vitamin D, plays a crucial role in regulating calcium and phosphorus levels in the blood. The primary effects of calcitriol on the body include:
Increase blood concentration of calcium: Calcitriol promotes the absorption of dietary calcium from the gastrointestinal tract and enhances the reabsorption of calcium in the renal tubules, reducing calcium loss in the urine.Increase blood concentration of phosphorus: Calcitriol works together with parathyroid hormone (PTH) to increase phosphorus absorption in the gastrointestinal tract, contributing to higher blood phosphorus levels.Based on these effects, the correct answers are (a) and (c).
complete question:
What are the primary effects of calcitriol on the body? Check all that apply.
a) Increase blood concentration of calcium
b) Decrease blood concentration of phosphorus
c) Increase blood concentration of phosphorus
d) Decrease blood concentration of calcium
Hakeem wants to explain why only one side of the moon is visible from Earth. Which comparison would provide the best support?
the orbital period of Earth with the rotational period of the moon
the orbital period of the moon with the rotational period of the moon
the orbital period of the moon with the rotational period of the Earth
the orbital period of Earth with the orbital period of the moon
The Moon orbits Earth once every 27.3 days and spins on its axis once every 27.3 days. This means that although the Moon is rotating, it always keeps one face toward us.
What is rotation?Rotation refers to an object's spinning motion about its own axis and revolution refers the object's orbital motion around another object.
It is also known as synchronous rotation this is why we only ever see the Moon's nearside from Earth.
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Although both clive wearing and a patient known as h.m. had severely damaged hippocampi or removed hippocampi, they both showed evidence of __________ memory.
Which of these sources add water to lakes? Select the three correct answers. A.Rain runoff B.Groundwater C.Melting snow D.Ocean waves
Answer: A. Rain runoff B. Groundwater C. Melting snow
A lake is a water body that is surrounded by land. They are found in mountains, deserts, plains and in seashores. The water in lakes comes from rain, snow, melting ice, streams, groundwater and seepage. Mostly lakes contain freshwater.
The correct answers are Rain runoff, groundwater, melting snow.
Water from the rain flows through various paths and goes into lakes. It carries various types of small leaves or soil particles along with it into the lake.
The ground water can also form lakes and is the source of freshwater.
The melting snow is also the source of fresh water that flows and reaches the nearby ponds or lakes present in the nearby areas.
How does the rate of extinction compare to the rate of species formation on Earth today?
The rate of extinction is faster than the rate of formation of species on earth today.
Explanation:The rate of extinction is the number of specie extinct divided by the time while rate of formation is the number of new specie formed divided by time.
In today's earth, the environmental conditions are not suitable for the formation of new specie from the old specie.
But the changing environment is causing extinction pf many species.
Hence in comparison, rate of extinction is faster than the rate of formation of species.
what molecule stores and transmits genetic information in all organisms
B. DNA
C.RNA
Which diagram of the container below correctly indicates the distribution of molecules A and B after the net movement of these molecules stops?
The diagram B indicates the distribution of molecules A and B after the net movement of these molecules stops.
What is isotonic solution?Two liquids that have the same osmotic pressure when they cross a semipermeable membrane are said to be isotonic.
Without affecting the solute concentration on either side, this condition enables free passage of water across the membrane.
Equal quantities of impermeable solutes are present on both sides of the membrane in isotonic fluids, which prevents the cell from expanding or contracting.
Isotonic solutions are used to increase the volume of extracellular fluid lost as a result of blood loss, surgery, dehydration, and extracellular fluid loss.
In the given scenario, the amount of solute in both the solutions are equal which means the net movement will be nil.
Thus, diagram B is correct one.
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Your question seems incomplete, the missing image is:
The four types of sperm cells illustrated below are produced by the process of
The nurse documents the pulse of the patient as weak and thready (1+). which conditions in the patient does the nurse identify as the reason for such findings?
Cells have the ability to reproduce by dividing into two identical cells called
if you needed a mass measurment accurate to three digits after the decimal, such as 3.149 grams, you would want to use- A) spring scale. B) an electronic balance. C) a triple-beam balance. D) at least two formulas off your formula chart.
A scientific _______ is a principle that describes the behavior of a natural phenomenon. ? A. analysis
Answer:
The correct answer will be- Scientific law
Explanation:
A statement proposed before the experiment related to the natural phenomenon which explains the event to a limited extent is known as the scientific hypothesis.
The scientific hypothesis when tested and proved by the researcher and fellow researchers many times transforms the hypothesis either to a scientific law or theory.
The scientific law is a statement which can contain quantifiable variables which describes the pattern and behavior of the natural phenomenon but do not explain why this behavior is observed which in turn is explained by the scientific theory.
Thus, Scientific law is the correct answer.
Celia smokes heavily throughout her pregnancy. celia is increasing the risk of ______ in her offspring. deformed arms and legs spina bifida sudden infant death syndrome liver damage teeth and bone deformities
Do you think osmosis occurs when a cell is in an isotonic solution? explain your reasoning.
Which of the following relationships is incorrect?
A. Rough ER -- Site of protein synthesis
B. Chloroplasts -- site of lipid synthesis
C. Cell wall -- Support and protection
D. Nucleus -- holds genetic material
You have been called for a 32-year-old female who is in active labor. during your assessment and interview, you note that she is 37 weeks along, this is her first child, and her contractions are 5 minutes apart. she also tells you that her pregnancy is considered high risk. your first concern should be:
How might giving a mumps vaccine to a boy protect his reproductive health later?
Answer:
Mumps can cause infertility. By giving a mumps vaccine to a boy, we are preventing the full effect of the disease if the boy has mumps in the future because the body is protected against this virus thanks to the vaccine.
Explanation:
Mumps can cause infertility in men. If we give a boy the mumps vaccine, we are giving him a modified version of the virus that is harmless, but that will make the body produce the specific antibodies for the disease. If in the future the boy has mumps it will be less harsh since his body has the antibodies to fight mumps and his fertility will not be at risk.
Which of the following explains the inversion of the aquatic pyramid of biomass? a. high phytoplankton turnover rate b. slow aquatic predator metabolisms c. small number of aquatic consumers d. high energy content of phytoplankton
Answer: Option C
Explanation:
The number of consumers is less than the number of producers but the biomass of consumers is more than the biomass of the producers.
The pyramid of the aquatic biomass is inverted it is because the size of the consumers is large as compared to that of the producers.
The consumers such as the fishes and other aquatic animals have more biomass as compared to that of the phytoplanktons.
Scientists have found that Mars has water ice at its poles, even though volcanic activity has never been observed on Mars. Would this prevent the inside-out model from becoming a theory?
A. Yes, because any comet that hit Earth also hit Mars.
B. Yes, because it shows that volcanic activity is necessary for a planet to have liquid water.
C. No, because no data from Mars is applicable to Earth.
D. No, because a single observation is not sufficient to discredit a theory.
Answer:
c
Explanation:
Scientists have found that Mars has water ice at its poles, even though volcanic activity has never been observed on Mars. No, because no data from Mars is applicable to Earth.
Who are scientists?The shift to renewable energy, the environment, digital society, health, mobility, and urbanization. enough difficulties for you to use science, engineering, and design to improve society.
You can collaborate with outstanding scientists at TU Delft, many of whom are leaders in their fields. You frequently collaborate with other scientists, as well as with businesses and governments, in multidisciplinary teams. In a free global community, you can practice intellectual freedom.
They gain a lot of knowledge because our students are well-known across the world for their accomplishments in projects like Project March, the Hyperloop, and the World Solar Challenge. Our scientists also share their expertise through online learning.
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Tonsils have blind-ended structures called ________ that trap bacteria and particulate matter.
Answer:
tonsillar crypts
Explanation:
How is the shape of a neuron suited to its purpose?
Final answer:
Neurons are designed with a cell body, dendrites, and an axon to facilitate the efficient transmission of nerve impulses. Their varied shapes and sizes, like long axons in sensory neurons or multipolar configurations in the brain, relate closely to their specialized roles. The structure of neurons, including myelin sheaths and synaptic connections, is integral to their function in nervous system communication.
Explanation:
Neurons have a unique shape that enables them to effectively transmit nerve impulses. With three primary components - the cell body, dendrites, and axon - their morphology is tailored to their function as conducting cells. The cell body contains organelles and establishes the metabolic center of the neuron. Dendrites extend from the cell body like branches and are crucial in receiving signals. The axon, often sheathed in myelin, is a long projection that carries the nerve impulse to the synapse, where it can be transmitted to other neurons or to effector cells such as muscles or glands.
Neurons vary in shape and size based on their functions; multipolar neurons with several dendrites and a single axon are common in the brain and spinal cord, while sensory neurons may have exceptionally long axons to transmit impulses over long distances. Each neuron type is specialized to either receive, process, or transmit signals efficiently, thus ensuring quick and precise communication within the nervous system.
Upon sufficient stimulation, an action potential is generated and travels along the axon. When it reaches the synapse, neurotransmitters are released, bridging the gap between cells and facilitating the continuation of the impulse. This complex yet well-organized structure reflects the fundamental role of neurons in the nervous system, aligning perfectly with their purpose of rapid and coordinated signal transmission.
Study Figure 10-1. The strong nuclear force felt by a single proton in a large nucleus
A. is much greater than that felt by a single proton in a small nucleus.
B. is much less than that felt by a single proton in a small nucleus.
C. is about the same as that felt by a single proton in a small nucleus.
D. is about the same as the electric force felt by a single proton in a small nucleus.
D. is about the same as the electric force felt by a single proton in a small nucleus.
Explanation;Nuclear force is the type of force that acts between the protons and the nucleus of atoms. Strong nuclear force is one of the four basic forces in nature, others being gravity, the electromagnetic force, and the weak force, and is the strongest,Strong nuclear force functions to hold the subatomic particles that is the protons and the neutrons,of the nucleus together.The strong nuclear force felt by a single proton in a large nucleus is about the same as that felt by a single proton in a small nucleus.Glial cells are the information processing units of our central nervous system. true or false