DNA, the inheritable Material DNA, deoxyribonucleic acid, is the inheritable material in your cells.
It was passed on to you from your parents and determines your characteristics. The discovery that DNA is the inheritable material was another important corner in molecular biology.For a patch to act as the inheritable material, it should have the following characteristics Be able of replication i.e. produce its own replica.It should be stable, structurally and chemically.It must have the compass for slow changes( mutations) to evolve. Be expressed in the form of ‘ Mendelian Characters ’.
Although DNA is the inheritable material in utmost organisms, in some contagions, RNA is the inheritable material. In fact, according to studies, RNA was the first inheritable material. But, since RNA is unstable, DNA evolved from RNA with chemical variations, making it more stable and more fit to carry inheritable information.
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Root hair cells absorb MINERALS from the soil by the process of…
Answer:
oot hair cells
Plants absorb water from the soil by osmosis. They absorb mineral ions by active transport, against the concentration gradient.
Explanation:
The conduction system contains pacemaker cells, nodes, the __, and the __.
The conduction system contains pacemaker cells, nodes, the Purkinje fibers, and the bundle of His.
What is the conduction system of the heart?The conduction system of the heart refers to the the system of cells and fibers which enables conduction of nerve impulse which enables the contraction of the heart.
The conduction system of the heart consists of:
Sinoatrial nodeAtrioventricular nodeAtrioventricular bundle (bundle of His)Purkinje fibersTherefore, the conduction system of the heart coordinates the contraction of the heart.
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The scientific evidence that scientists use in supporting or critiquing the conclusions of experiments usually consists of
A) raw data
B) outlier data
C) precise data
D) summarized data
Answer:
The answer is A raw data i think I'm not sure
How long are Capillary sites generally warmed?
Capillary sites generally should be warmed within 3 minutes.
What is Capillary site?
Parts of the body such as the finger or heels are regarded as capillary sites in which blood is usually collected.
Heating this site within three minutes will ensure that blood flow within that area is enhanced or increased.
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Organisms with the most beneficial traits will survive. This is commonly known as.
Answer:
O Ecosystem which is survival of the fittest.
Explanation:
Answer:
Natural selection
Explanation:
Choose all the answers that apply.
Asteroids:
only orbit planets
take millions of years to orbit the sun
are made of frozen gas and ice
sometimes come very close to Earth
only orbit the sun
Asteroids sometimes come very close to Earth and take millions of years to orbit the sun. Thus, the correct options are B and D.
What are Asteroids?Asteroids may be defined as nominal planets which can neither be classified either as a planet or as a comet that orbit the sun as well as planets.
An asteroid is a name we allocate to the enormous number of small bodies that orbit the sun, here in the internal solar system. These small bodies orbit planets as well as the sun and take a significant time in orbiting.
Therefore, the correct options are B and D.
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The geographic isolation of a population from other members of the species and the subsequent evolution of reproductive barriers between it and the parent species describes ________ speciation. Group of answer choices sympatric
Answer:
allopatric speciation.
Explanation:
What is pasteurization, and how is it used?
Answer:
pasteurization is when any dairy product has each milk particle heating up above a certain amount. Pasteurization successfully removes any possible bacteria in the milk products effectively preventing Illness
For Labrador retrievers, black fur is dominant over yellow. Could a golden yellow
Labrador be obtained by crossing two black ones? Explain. (3 marks)
Answer:
it could
Explanation:
the recessive genes of the golden fur is still in the gene pool and maybe one black lab has the dominate black fur gene but has the golden recessive gene still accessible. so it could happen
What makes plants wilt?
C. a lack of stability that would usually come from the
ribosomes
A. a lack of turgor pressure that would usually come
from water stored in the central vacuole
B. a lack of motility that would usually come from the
nucleus
Answer:
A
Explanation:
Due to the hot weather the plants moisture start to decrease until they wilt.
Answer: a lack of turgor pressure that would usually come from water stored in the central vacuole
Explanation: Dehydration.
Describe the genetic code and its relationship to polypeptides and proteins
The genetic code is directly related to polypeptides and proteins in the sense that genes are decoded to synthesize proteins.
What is the genetic code?Genetic code is the set of rules by which the sequence of bases in DNA are translated into the amino acid sequence of proteins.
The genetic code is unique for living organisms and is used to synthesize the proteins that is responsible for various activities in living organisms.
The genes in the genetic code are first transcribed into mRNA, which is then translated into proteins (polypeptides).
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What do excitatory neurotransmitters cause ?
Exitatory neurotrasmitter excite the postsynaptic memebrane by increasing the action potential effects. They allow the messages passage from one cell to the other.
What do excitatory neurotransmitters cause?
Neurotransmitters might be either excitatory or inhibitory.
As the term suggests, excitatory neurotransmitters are in charge of exciting the postsynaptic cell.
Once the neurotransmitter is released from the presynaptic membrane, it travels through the synaptic space until it reaches the postsynaptic membrane.
When the molecule meets its receptor, it triggers a series of events that excite the receiving neuron increasing the action potential effects and allowing messages to be passed from one cell to the other.
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Hello people ~
Which of these is not a process that can cause speciation?
A. Seasonal migration
B. Asexual reproduction
C. Mate selection
D. Genetic damage
Answer:
I believe it's D. asexual reproduction
What does the light red layer between the white lumen and blue lamina propria consist of?
The light red layer between the white lumen and blue lamina propria consist of epithelium cells.
What is a lamina propria?
A lamina propria is a type of connective tissue that is present and found under the thin layer of tissues covering a mucous membrane.
Characteristics of the lamina propriaIt is a very large layer of connective tissueIt divides the innermost layer from a layer of smooth muscle tissue.it is a light red layer barrier located between the white lumen and blue lamina.It is made up of epithelium cells.It is also found in the respiratory tract, the Gastrointestinal tract, and the urogenital tract.Thus, the light red layer between the white lumen and blue lamina propria consist of epithelium cells.
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Explain how an arteriole can reduce the blood flow into capillaries
The arteriole can reduce the blood flow into capillaries because the pressure difference between two ends.
What is the function of arterioles?
Arterioles are final branches of the arterial system. Arterioles regulate the distribution of blood in different capillary beds by vasoconstriction and vasodilation in localized regions, because their walls contain circularly arranged smooth muscle fibers.
So the flow through a blood vessel is entirely determined by the pressure difference between the two ends of the vessel, which is the force pushing blood forward through the vessel, and the obstacle to flow.
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what is the significance of diffusion and osmosis in living organism ?give one example in support of your answer
Answer:
Plants use this to absorb water from the soil to the roots. Osmosis is important to plants because it allows for water uptake, photosynthesis and general stability.
Osmosis ensures that all cells and structures within a plant have correct water pressure and volume.
In animals, osmosis helps to absorb water from the intestines to the blood.
Explanation:
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The smallest contractile unit within skeletal muscle would correspond to the distance between which two points in the figure?
The distance between 1 and 7 spans a sarcomere correspond the structure at B is covered by the perimysium.
What is the smallest contractile unit within skeletal muscle?A sarcomere comprises the segment between two consecutive Z lines and is the contractile unit of the muscle fiber, as it is the smallest portion of the muscle fiber capable of contraction and distension.
In this case, the distance between points 1 and 7 has the smallest structure of a skeletal muscle and corresponds to figure B.
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Beverly and Carl are in a race. Their graphs show the data.
A graph with horizontal axis time (seconds) and vertical axis velocity (meters per second). An orange line labeled Beverly starts at 0 seconds 0 meters and goes straight to 10 seconds 15 meters and then to 50 seconds 35 meters. A blue line labeled starts at 0 seconds 0 meters and goes straight to 10 seconds 10 meters and then to 50 seconds 30 meters.
Which best describes the race?
Even though for a majority of the race they accelerated at the same rate, Beverly won because hethe r initial acceleration was greater than Carl’s.
How, explain your answer?The given parameters are listed as follows:
For Beverly: initial time of motion, t₁ = 10 s
initial velocity, u = 15 m/s
final time of motion, t₂ = 50 s
final velocity, v = 35 m/s
For Carl: initial time of motion, t₁ = 10 s
initial velocity, u = 10 m/s
final time of motion, t₂ = 50 s
final velocity, v = 30 m/s
In summary, Beverly and Carly had the same average acceleration for the majority of the race but the initial acceleration of Beverly was higher than that of Carl, hence Beverly won the race.
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Answer: c
Explanation: Even though for a majority of the race they accelerated at the same rate, Beverly won because her initial acceleration was greater than Carl’s.
The people represented by the Denisova fossils likely Group of answer choices were isolated to the point of extinction. looked very much like Neandertals. share a common ancestor with Neandertals. interbred with Homo erectus.
The people represented by the Denisova fossils likely share a common ancestor with Neandertals. The correct option is c.
What are Denisova fossils?So far, there is little physical evidence of the Denisovans' existence. A finger bone, teeth, and skull fragment from a Siberian cave, as well as a lower jawbone from a Chinese cave on the Tibetan plateau, have been discovered so far.
The people represented by the Denisova fossils likely share a common ancestor with Neandertals.
Thus, the correct option is c.
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The list shows some of the livestock being raised in South Dakota.
Annual Livestock Inventory in South Dakota
•
3.7 million cattle and calves
1.4 million hogs and pigs
91,000 dairy cows
•
285,000 sheep and lambs
38,000 bison
D
Based on these data, which type of livestock is least likely to be raised in
large-scale industrial livestock production in South Dakota?
O A. Beef cows
• B. Bison
• c. Sheep and lambs
• D. Dairy cows
As per the given data, Beef cows a type of livestock is least likely to be raised in large-scale industrial livestock production in South Dakota. The correct option is A.
What is livestock?With the exception of poultry, livestock refers to farm animals. Cattle, sheep, pigs, goats, horses, donkeys, and mules predominate in Western countries; other animals, such as buffalo, oxen, llamas, or camels, may predominate in other areas' agriculture.
As per the given data, Beef cows a type of livestock is least likely to be raised in large-scale industrial livestock production in South Dakota.
Thus, the correct option is A.
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Which of the following is TRUE about the role of organisms in biogeochemical cycles?
A. Materials follow a cyclic path in the ecosystem.
B. The end part of every food chain is decomposers.
C. Primary consumers take more energy than Secondary consumers
D. Biotic factors bring back the essential materials to the environment through respiration or decomposition.
Answer:
C.
Explanation:
C. Primary consumers take more energy than Secondary consumers
___________ synthesizes carbohydrates and puts finishing touches on proteins synthesized at
The Golgi complex synthesizes carbohydrates and puts finishing touches on proteins synthesized at rough endoplasmic reticulum.
What is cell organelles?The cell organelles are the membrane bound structures found within the cells which has different specific functions.
Example of cell organelles include:
Golgi complex: These organelles specializes in protein modification and exportation.Endoplasmic reticulum: These organelles are specialized for protein production for export out of the cell.Learn more about cell here:
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When HUMAN BEINGS drown in the ocean and cannot survive, animals such as WHALE and SHARK can. Explain why.
Answer:
Because a whale and a shark are water animals and have special gills for breathing under water and humans are land animals
Explanation:
Answer:
Whales And Sharks have biological features (Gills and etc.) that give them the ability to "breathe" underwater. Humans do not.
Explanation:
Humans don't have the biological features necessary to breathe underwater (without man-made equipment)
Halophilic bacteria possess a pigment related to ____________ that absorbs solar energy to pump chloride ions, keeping them alive under such saline conditions.
Halophilic bacteria possess a pigment related to the plant's chlorophyll.
Halophilic bacteriaThey are bacteria that live in high salt environments. They have a certain feature that enables them to pump out salts in order to maintain normal osmotic conditions in their bodies.
Halophilic bacteria are equipped with bacteriorhodopsin and halorhodopsin. These enable them to photosynthesize like plants. and generate the much-needed ATP for pumping out salts.
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Elephantiasis is caused by _____.
Cnidarians: jellyfish
Platyhelminthes: flat worms
Nemotoda: round worms
Mollusca: mollusks
Annelida: segmented worms
Answer:
Elephantiasis is caused by nematodes (roundworms).
What is elephantiasis?
A chronic filarial disease resulting in lymphatic obstruction, characterized by marked enlargement of the parts affected, especially the legs and scrotum, transmitted by mosquitos.
Elephantiasis is caused by nematodes (round worms). Round worms are any nematode, especially Ascaris lumbricoides, that infests the intestine of humans and other mammals.
Some prevention to take against elephantiasis:
Mosquito nets, insect repellentVoodoo healing techniquesElevate and exercise affected body partSkin treatment
Wash area twice dailyAntibacterial creamCDP
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What activates neutrophils?
Neutrophils are activated by chemokines such as pathogen molecules or cell damage–associated proteins.
What are Neutrophils?
These are granulocytes and comprise of majority of the white blood cells found in the body.
They are usually activated by chemokines which are usually in the form of pathogen molecules or cell damage–associated proteins to ensure the body is adequately protected.
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Which cells are present during acute inflammation?
Neutrophils are the cells which are present during acute inflammation.
What is Neutrophil?These cells are referred to as granulocytes and make up of majority of the white blood cells.
When inflammation occurs, the neutrophils go to the site and destroy the micro-organisms through ingestion or releasing enzymes so as to keep the body safe.
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1. What observations made in the 1600s and 1700s led some people to believe that there was a
"vital force" in the air?.
Microscopical observations show the presence of simple in structure, abundant, and pervasive microorganisms. Researchers at the time came to the conclusion that there was a life force in the air.
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A red blood cell has been placed into three different solutions. One solution is isotonic to the cell, one solution is hypotonic to the cell, and one solution is hypertonic to the cell. Determine which type of solution is in each beaker based on the cell's reaction. Drag each item to the appropriate bin.
The type of solution in each beaker based on cell's reaction are :
Isotonic solution : Normal reactionHypotonic solution : The cell becomes turgidHypertonic solution : The cell becomes deformedMatching each solution to the cell reaction
When the red blood cell is placed in an isotonic solution the solvent flows in and out of the blood cell at the same rate, when the cell is placed in a hypotonic solution the solvent flows into the cell at a faster rate causing the cell to swell ( becomes turgid ) also when the cell is placed in a hypertonic reaction the cell becomes deformed becomes it loses more water than it absorbs.
Hence we can conclude that The type of solution in each beaker based on cell's reaction are : Isotonic solution : Normal reaction, Hypotonic solution : The cell becomes turgid, Hypertonic solution : The cell becomes deformed
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Summation that results from the cumulative effect of multiple synapses at multiple places on the neuron is designated.
Summation that results from the cumulative effect of multiple synapses at multiple places on the neuron is designated spatial summation.
A strategy for generating an action potential in a neuron using input from several presynaptic cells is called spatial summation. It is the algebraic addition of potentials from various input regions, typically dendrites.This process, known as spatial summation, occurs when inputs from several neurons combine to cause an action potential. These potentials, which are often from dendrites, are combined to produce the spatial summation.The likelihood that a potential will reach the threshold level required to trigger an action potential increases with the amount of excitatory postsynaptic potentials. Similar to this, the likelihood of attaining the threshold potential to trigger an action potential decreases as the number of inhibitory postsynaptic potentials increases.
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