Some plants lose their leaves and go dormant during hot, dry summers. What happens when these plants' life processes during dormancy? How does this help the plants survive?
Answer:
Dormancy is when a plant just stop growing and development. that doesn't mean they stop completely, while other part of plants are stopped developing, the root continue to develop and thrive to get more nutrients.
Explanation:
Final answer:
Plants that lose their leaves and go dormant during hot, dry summers suspend their growth and development to conserve energy and survive the extreme conditions. This strategy helps them reduce water loss and rely on stored energy until more favorable conditions return.
Explanation:
Plants that lose their leaves and go dormant during hot, dry summers undergo a process called dormancy. During dormancy, the plants suspend their growth and development in order to conserve energy and survive the extreme heat and dryness. While dormant, the plants do not perform typical life processes such as photosynthesis, respiration, or growth. Instead, they rely on stored energy and resources to remain alive.
This strategy helps the plants survive by reducing water loss through transpiration. By shedding their leaves and going dormant, the plants minimize their surface area, which decreases the amount of water lost to the environment. Moreover, by conserving energy and resources during dormancy, the plants can withstand the challenging conditions until more favorable conditions return, such as the arrival of cooler temperatures and rainfall.
The Miller-Urey experiment showed:_________
a) life could be generated in their apparatus after one week.
b) the essential biological molecules associated with living organisms could be generated in an "abiotic" environment.
c) the essential biological molecules associated with life cannot be generated in an "abiotic" environment.
d) conditions in the "primitive Earth environment" could have generated complex molecules.
Answer:
D. They used simple molecules from early times and put them in a simulation from that time and it made complex ones that we have now.
The presence of a poly-A tail on a RNA molecule indicates that: A. there are exons present that must be removed B. this RNA molecule does not contain introns C. the transcript should be immediately degraded D. this is a rRNA molecule E. None of the above
Answer: E. None of the above
Explanation:
During transcription, a sequence called a polyadenylation signal occurs in an RNA molecule, an enzyme at that site chops the RNA in two. The enzyme adds to the cut end around 100-200 adenine (A) nucleotides which form a poly-A tail at 3' end. The tail make transcript which is more stable and functions to be exported to the cytosol from the nucleus. Some sections of the RNA transcript (introns) are deleted when splicing, and the remaining sections (exons) are kept together.
Hence, the corrcet option is E.
A poly-A tail on an RNA molecule is a characteristic of mRNA, it stabilizes the mRNA, helps it exit the nucleus, and aids in protein synthesis but does not indicate the direct presence of certain RNA types or the need for immediate degradation.
Explanation:The presence of a poly-A tail on an RNA molecule is a signature feature of messenger RNA (mRNA) and it does not directly indicate the presence or absence of exons or introns, nor does it imply that the transcript should be immediately degraded or that it is rRNA molecule. Instead, the poly-A tail functions to stabilize the mRNA molecule, facilitating its export from the nucleus, and aiding in protein synthesis at the ribosome.
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Mei wants to study whether heart rate increases more during certain exercises than during others. She designs an experiment to
test the heart rates of classmates in the morning and in the evening for three days, immediately after doing jumping jacks, doing
push-ups, or running in place. What is the dependent variable in this experiment?
Answer:
It is their heart rates.
Answer:
I believe it is C
Explanation:
heart rate
Do Zygote Fungi have loosely arranged hyphae?
Answer:yes
Explanation:
A 53-year-old man suddenly collapses and becomes unresponsive. You Witness him collapse and are the first rescuer to arrive at the scene. You find him lying motionless on the floor.
Which is the first action you should take in this situation?
a) Check his pulse
b) Start high-quality CPR
c) Start providing rescue breaths
d) Shout for nearby help
Answer:
D-A-C-B
Explanation:
In that order to save this mans life.
In a scenario where a person collapses and becomes unresponsive, the first course of action should be to shout for nearby help and contact emergency services. The subsequent actions would be checking the person's pulse, and if absent, starting high-quality CPR and rescue breaths.
Explanation:This scenario is a potential medical emergency, likely a case of sudden cardiac arrest, where immediate actions are crucial. The first action to take when someone suddenly collapses and becomes unresponsive is to 'Shout for nearby help' (option d). This can include yelling out to alert any nearby individuals about the situation and calling 911, or asking someone else to, while you check the person's vital signs (breathing, pulse).
Option a, 'Check his pulse', would be the next step. If pulse and/or breathing are absent, then options b, 'Start high-quality CPR', and c, 'Start providing rescue breaths', would follow accordingly as per Basic Life Support guidelines. However, in any such emergency situation, it is essential to call for professional help first and as soon as possible.
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Cuticle, stomata, and vascular tissue are all key adaptations enabling land plants to _____.
A. grow more quickly
B. survive better in aquatic environments
C. reproduce more quickly
D. colonize land
Answer: (D) colonize land
Explanation:
When Mendel self-pollinated plants from the purple-flowered F1 generation, he saw that one out of every four plants in the F2 had white flowers. What reasoning did Mendel use to explain how the white, hidden trait reappeared?
Answer:
The reasoning that Mendel uses to explain how the white hidden trait reappeared was that only offsprings that have two recessive alleles show the hidden trait.
Explanation:
The F1 generation had two different alleles, one that coded for purples flowers and one that coded for white flowers, the allele for white flowers was hidden by the dominant allele, that is why the F1 generation were purple flowers. In the F2 generation, the two alleles that coded for flower color were the same, which means that they were both recessive and, as a result, the F2 generation of flowers was white because there was not a dominant allele that hid the other one.
A population of rabbits live in a local forest. Some had a mutation for a Large Body
and Long Legs. The graph below shows the number of both the mutant and the
normal rabbits over 5 generations. Which of the following statements is true for this
scenario?
A.) the rabbits with the mutation were more successful with restricted food than normal rabbits
B.) Both sets of rabbits were equally successful with the restricted food source
C.) the normal rabbits were more successful with restricted food than the rabbits with the mutation
Explanation:
A.) the rabbits with the mutation were more successful with restricted food than normal rabbits.
From the graph, it is concluded that the rabbits with the mutation were more successful with restricted food than normal rabbits, which are present in Option A, as the mutant rabbits increase as generations grow but the normal rabbits decline.
What is the significance of the mutation of the traits?A mutation of a trait is significant because mutation can cause changes in the DNA sequence of an organism and variations in its traits, and genetic variations can provide a source of diversity within a population, which can sometimes be beneficial or detrimental.
Hence, from the graph, it is concluded that the rabbits with the mutation were more successful with restricted food than normal rabbits, which are present in Option A, as the mutant rabbits increase as generations grow but the normal rabbits decline.
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what is heterotrophs
Answer:
A heterotroph is an organism that cannot produce its own food
Explanation:
Final answer:
Heterotrophs are organisms that cannot produce their own food and must obtain it by consuming other organisms. They are dependent on autotrophs for energy-rich compounds, highlighting the interconnectedness of ecosystems. Heterotrophs include animals, fungi, and many protists and bacteria.
Explanation:
Heterotrophs are organisms that cannot manufacture their own food through processes like photosynthesis or chemosynthesis and must, therefore, acquire it by consuming other organisms. These organisms gain the energy and carbon they require from food sources ranging from plants to other animals or organic molecules, which trace back to autotrophs that convert solar energy into chemical energy through photosynthesis. Heterotrophs can be classified as herbivores, carnivores, omnivores, and decomposers, based on their dietary habits.
Heterotrophs include not only animals and fungi but many protists and bacteria as well. Their survival is intricately linked to the presence of autotrophs, as the latter produce the fundamental energy-rich organic compounds that heterotrophs consume. Even in more complex food chains, the energy ingested by heterotrophs originates from autotrophs, showcasing the interconnected nature of all life within an ecosystem.
Describe 2 homologies (structures that were shared from a common ancestor) between the Zeuglodon and the Orca.
The Zeuglodon and Orca share homologies in their streamlined bodies adapted for aquatic environments and in the skeletal structure of their flippers, both resulting from a shared ancestral origin. These homologies exemplify common evolutionary traits due to shared genetics and embryonic development.
Explanation:Two homologies between the Zeuglodon, an ancient whale, and the modern Orca (killer whale) include their overall bodily structure and specific skeletal elements. Both species have streamlined bodies adapted for efficient movement through water, a characteristic inherited from their common ancestor. This convergent evolution results in a similar body shape that is homologous due to a shared evolutionary history. Moreover, both creatures have homologous structures in their flippers. The bones within the flippers of both the Zeuglodon and Orca are homologous to the bones found in the forelimbs of other mammals. These structures are examples of homology because they have similar embryonic origins and genetic layouts, which are a result of their shared ancestry, despite the different functions the flippers serve in their aquatic environments.
The major nonelastic source of resistance to air flow in the respiratory passageways is ________.
Pythons are generalist predators, consuming a wide variety of prey including birds, mammals ranging from rodents to deer, and alligators. A road survey showed a 99 percent decrease in the frequency of raccoon and opossum observations within python areas from 2003 to 2011. Rabbits and foxes have also disappeared from the area. Do you think food availability limits, or could limit, the carrying capacity of Burmese pythons in the Everglades?
Answer: As pythons are generalists, the food availability would not be a primary factor in determining the carrying capacity of pythons.
Explanation:
A generalist species or organisms are those which are capable to survive in wide variety of environmental conditions. Such species can make use of variety of resources available in the native or new habitat. For example, a heterotroph dependent upon variety of diet sources.
The carrying capacity is the maximum number of members of the population of species that an ecosystem can sustain.
According to the given situation, the pythons are generalists predators and they are consuming a wide variety of prey. The decrease in the population of raccoons and opossums indicates that the rate of predation is very high in these pythons. Also, the population of rabbits and foxes also disappeared from the area. In the long run the size of the python population may become food limited. The population of python may not increase exponentially.
The availability of food is likely to limit the carrying capacity of Burmese pythons in the Everglades. This is because the significant decrease in the sightings of typical prey animals as well as the python's high energy demand may limit their population growth. Predator population dynamics are often tied to the availability of prey.
Explanation:
Yes, the availability of food can limit, or potentially limit, the carrying capacity of Burmese pythons in the Everglades. The carrying capacity of a species in an area is determined by the limiting resources. In this case, the predators' (Burmese pythons) food source comprises of mammals, birds, and reptiles. From 2003 to 2011, there was a significant decrease in the sightings of raccoons, opossums, rabbits, and foxes in the area. This reduction in prey, coupled with the generalist predatory nature of the pythons, may put a limit on the python population. Pythons are large snakes that consume relatively large prey, and as such have a high energy demand. When the availability of their food source decreases, it limits their population growth. This is a common concept in ecology, where predator population dynamics are typically tied to the availability of their prey.
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This activity asks that you place the steps of phagocytosis in the correct order. drag the steps below into the boxes provided to indicate the order in which they occur.
Answer:
Activation of the Phagocyte
Chemotaxis of Phagocytes
Attachment of the Phagocyte to the Microbe or Cell
Ingestion of the Microbe or Cell by the Phagocyte
Destruction of the Microbe or Cell
Explanation:
. Phagocytosis is the primary method used by the body to remove free microorganisms in the blood and tissue fluids.Phagocytic cells include neutrophils, eosinophils, monocytes, macrophages, dendritic cells, and B-lymphocytes. The process of phagocytosis often happens when the cell is trying to destroy something, like a virus or an infected cell, and is often used by immune system cells.Process of phagocytosis is
1.Chemotaxis which is defined as the movement in response to chemical stimulation.
2.Adherence: attachment to a microbe.
3.Ingestion: engulfing pathogen with pseudopodia wrapping around pathogen.
4.Digestion: phagosome maturation.
5.Elimination: phagocytes eliminate remaining pieces of microbe via exocytosis.
There are four main steps in phagocytosis
1. the plasma membrane entraps the food particle
2. a vacuole forms within the cell to contain the food particle
3. lysosomes fuse with the food vacuole
4. enzymes of the lysosomes digest the food particle.
The nontaxonomic term sea slug encompasses a wide variety of marine gastropods. One feature they share as adults is the lack of a shell. We might think, therefore, that they represent defenseless morsels for predators. In fact, sea slugs have multiple defenses. Some sea slugs prey on sponges and concentrate sponge toxins in their tissues. Others feed on cnidarians, digesting everything except the nematocysts, which they then transfer to their own skins. Whereas the most brightly colored sea slugs are often highly toxic, others are nontoxic and mimic the coloration of the toxic species. Their colors are mostly derived from pigments in their prey. There are also sea slugs that use their coloration to blend into their environments.a.nematocystsb.an incurrent siphonc.a radulad.a mantle cavity
Answer:
Option D, A radula
Explanation:
Complete question
Which structure do sea slugs use to feed on their prey?
A) nematocysts
B) a sharp beak
C) an incurrent siphon
D) a radula
E) a mantle cavity
Solution
Sea slung are known as marine gastropod mollusks and like all other member of the mollusk family, sea slug uses their radula to capture their food.
A radula is basically a chitinous ribbion which is used for holding, cutting and chewing food.
Most of the gastropod mollusks feed on diatoms by grazing and scraping them through radula.
Hence, option D is correct
A client reports an episode of losing control of urination when a bathroom wasnât close by. The client states, "Iâm worried this means that Iâm starting to lose control of my bladder." What is the appropriate nursing response?
Answer: "Let's review your medication history and whether you consume bladder irritants."
Explanation:
Bladder irritants such as caffeine or alcohol can aggravate urge incontinence, which can occur if diuretics taken in the morning.
The nurse will begin by analysing those factors affecting the bladder irritants. Without further consideration the nurse should not dismiss this as an isolated case. This is too early to refer the person to the healthcare provider, or prescribe undergarments for incontinence.
Hence, the suitable statement by nurse is "Let's review your medication history and whether you consume bladder irritants."
An isolated incident of losing control of urination may not necessarily be a major concern. If it persists, it could indicate a condition like urinary incontinence. It's best to seek professional medical advice.
Explanation:An isolated incident of losing urination control, while embarrassing, is not necessarily a reason for major concern. It's important to ascertain if this has occurred more frequently or was an isolated incident due to lack of near restroom.
However, persistent issues might indicate a concern such as urinary incontinence which could be due to various factors like bladder irritants, urinary tract infections, or neurological disorders. It's highly advisable for the client to seek medical advice if such episodes continue.
Nurses play a role in educating about bladder health and potential causes of such issues.
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At 20°C the enzyme that catalyzes the breakdown of polysaccharides functions at 1 reaction every 20 microseconds. If this enzyme catalyzes hydrolysis reactions of a very long polysaccharide molecule for 120 microseconds, into how many segments would this long polysaccharide be cut?
Answer:
Seven segments
Explanation:
As given in the question -
After every twenty microseconds one reaction occurs i.e breakdown of polysaccharides.
This means that after every twenty microseconds the polysaccharides is broken down
The total time for this hydrolysis reaction is [tex]120[/tex] micro seconds
Thus , there will be six phases of division each after every twenty microseconds
After 1st twenty microseconds , total segments is equal to two
After 2nd twenty microseconds , total segments is equal to three
After 3rd twenty microseconds , total segments is equal to four
After 4th twenty microseconds , total segments is equal to five
After 5th twenty microseconds , total segments is equal to six
After 6th twenty microseconds , total segments is equal to seven
The enzyme amylase would cut the long polysaccharide into 6 segments.
Explanation:Enzymes play a crucial role in breaking down macromolecules in our bodies. Specifically, amylase is the enzyme responsible for breaking down polysaccharides such as starch into smaller glucose molecules. Given that the enzyme functions at a rate of 1 reaction every 20 microseconds at 20°C, and it catalyzes the reaction for 120 microseconds, we can calculate the number of segments the long polysaccharide would be cut into.
First, we can determine the number of reactions that occur in 120 microseconds by dividing the total time by the rate of the enzyme: 120 microseconds / 20 microseconds per reaction = 6 reactions.
Since each reaction cuts the polysaccharide into smaller segments, the long polysaccharide would be cut into 6 segments in this case.
When an accident happens, your immune system cues up your internal fire alarm: your __________________ response. Instead of sirens, it uses chemicals to get the message out and instead of smoke or fire you sense redness, swelling, heat, and pain.
Answer:Immune
Explanation: When an accident happens your immune response is the response that uses chemicals which may cause redness, swelling, heat, and pain
Christian and jonathan are observing different organisms in the science lab. What are the characteristics can be used to classify an organism into a taxonomic domain?
Answer:
Presence of nucleus in cells.
Explanation:
The organisms that are divided into various taxonomic categories are the physical features and the species characteristics decided as per the kingdom they belong to.
What is taxonomic heir achy ?It is defined as the division of the organism based on the decided levels as per the characteristics, mode of reproduction and various activities they perform .
To classify an organism in the domain they belong to firstly they will differentiate the organism on the basis of their physical features, secondly to the cellular level of organisation, mode of reproduction and the various levels. The total of regulatory activities and the mode of organisation decides the taxonomic heir achy.
To classify an organism is super easy just the organism should not share the common features where an organism shows the similarities between two groups. For example platypus is the organism that is mammal but they lay eggs.
Therefore, the level of organisation and activities decide the taxonomic heirachy.
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Describe the living and nonliving things that define the area or region in which you live. In your area, are there any organisms with which you interact?
Answer:
I interact with my parents and siblings, who are living organisms. However, something that is non-living is the computer that I am typing this answer on.
What is not true about the lactiferous ducts and sinuses? what is not true about the lactiferous ducts and sinuses? they produce milk for the newborn their function is performed only by females they are part of the mammary glands they are part of the uterus?
Explanation:
They are part of the uterus is not true about the lactiferous ducts and sinuses
Lactiferous ducts are the 15-20 tubular drains for the lobes of the mammary glands which converge to open at the tip of the nipple; their distal ends are expanded to form lactiferous sinuses to store milk, which is produced gradually, until it can be released during bouts of nursing which stimulates an autonomic reflex and is assisted by oxytocin release for milk letdownLactiferous sinus is the short oval enlarged dilation of each lactiferous duct in the breast tissue just beneath the nipple; in lactating females, this is a storage depot for milk, which is produced gradually by the alveoli, and will be expressed from the nipple by compression as the infant begins to nurseWhat is most directly responsible for the coupling of excitation to contraction of skeletal muscle fibers?
Answer:
Calcium ions.
Explanation:
Calcium ions are present in the sarcoplasm reticulum and are directly responsible for the coupling of excitation to contraction of skeletal muscle fibers. Propagation of action potentials along with sarcolemma causes a voltage sensitive protein to alter the shape and this alteration releases calcium ions by opening the calcium releasing ion channels to flood the sarcoplasm.
So, the calcium ions are directly responsible for the coupling of excitation to contraction of skeletal muscle fibers.
Describe human behaviors that affect renewable and non-renewable resources.
Explanation:
Renewable and Nonrenewable resources are types of natural resources.
Renewable resources are those resources that can be replaced and renewed naturally such as air, wind whereas nonrenewable resources are those resources that cannot be replaced naturally such as coal, natural gas.
Human behavior has affected the natural resources and its quality.burning of fossil fuels by the human has affected the natural resources by releasing chemicals and toxic substances in the environment.Deforestation, land construction and mining activities have disturbed the ecosystem and natural resources.A large number of factories and vehicle used by the human has affected the natural resources as it affects the natural quality and increase in the demand for fossil fuels has resulted in depletion of the limited resources.The function of antibodies is to A. inject toxins into living pathogens. B. mark pathogenic cells for destruction. C. act as Toll-like receptors. D. release perforins to disrupt infected cells. E. secrete cytokines that attract macrophages to infection sites.
Answer:
Mark pathogenic cells for destruction. (Ans. B)
Explanation:
Antibodies are generated by the plasma cells, and once these secreted, they attach quickly to the surface of the toxin and stop the toxin from infecting the normal body cell by blocking key extracellular sites.
Antibodies also help to mark pathogens for destruction by the help of macrophages or neutrophils and they are known as phagocytic cells because they are highly excited to macro-molecules complexed with antibodies.
A certain substance inhibits sleep, increases alertness, and speeds up central nervous system. It easily becomes habit forming, with rapid development of tolerance. Chronic users experience paranoid delusions and brain damage. What drug is this?
When they sleep the want to reduce the high number of risk in the chronic.
What is nervous system?Signals are sent from the brain to the rest of the body, including the internal organs, via the nervous system.
Thus, the nervous system's activity regulates a variety of functions, including the capacity to move, breathe, see, and think.
The nerve cell, or neuron, is the building block of the neurological system. There are around 100 billion neurons in the human brain. A neuron has a cell body, which contains the cell nucleus, as well as distinct extensions known as axons and dendrites.
Therefore, When they sleep the want to reduce the high number of risk in the chronic.
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explain how a gene from one organism can be inserted into a bacterium yo produce a genetically modified bacterium
Answer:
The genetically modified plasmid is introduced into a new bacteria or yeast cell.
Explanation:
This cell then divides rapidly and starts making insulin. To create large amounts of the cells, the genetically modified bacteria or yeast are grown in large fermentation vessels that contain all the nutrients they need.
Fungi:_____
a) are single-celled organisms are filled with chlorophyll release enzymes that digest cells.
b) are least likely to attach hair covered areas of the body obtain their food by photosynthesis
Check all statements below that are true.
All organisms must compete for survival.
When organisms struggle to survive, they usually mutate to increase chances of reproduction.
Some organisms have phenotypes that make them better competitors than others in their
environment
Animals undergo natural selection, but plants and other organisms generally do not.
Natural selection continues to occur even today.
Phenotypes found in the most successful members of a species become the most prevalent afte
several generations.
A decrease in food availability will increase the variation in a population.
DONE
Answer:
1, 3, 5, & 6
Explanation:
Just did it
For biology i have to pretend im a scientist in the year 3020 and i have to create an animal and explain what the worlds climates would look like and i need help i cant think of any....
Please help...
Try mixing two or more animals together to create an animal. Research their physical features, the environment they do well in, senses, etc.
For example:
A cat-like creature with an alligator's tail and a bird's beak.
This creature would have cat-like instincts, but be able to swim underwater to to it's alligator tail (alligators are born to swim) and sing like a bird due to it's beak. Plus you could add anything else you want.
Another thing you could do is look up fantasy animals from video games and get inspired from them!
For worlds, you probably want to build a world that your animal could survive in.
No Man's Sky, a video-game, has endless biomes and worlds that you can take inspiration from for the climate and it's features.
You could also research about any known planets (doesn't have to be in our solar system) and mix two or more together, take aspects from one planet and give it to another, etc!
I hope these ideas helped you a bit :)
Multiple anterior rootlets arise from the spinal cord and merge to form a single ____________ root, which contains ____________ axons only. These axons arise from cell bodies in the anterior and ____________ horns of the spinal cord. Posterior rootlets arise from a single ____________ root, which contains ____________ axons only. The cell bodies of these neurons are located in a ____________ , which is within the posterior root. Each anterior root and its corresponding posterior root unite within the ____________ to become a spinal nerve.
Final answer:
Motor axons from the ventral horn form the ventral nerve root, and sensory axons from the dorsal root ganglion form the dorsal nerve root. These unite to become a spinal nerve.
Explanation:
Multiple anterior rootlets arise from the spinal cord and merge to form a single ventral (anterior) nerve root, which contains motor axons only. These axons arise from cell bodies in the anterior and lateral horns of the spinal cord. Posterior rootlets arise from a single dorsal (posterior) nerve root, which contains sensory axons only. The cell bodies of these neurons are located in a dorsal (posterior) root ganglion, which is within the posterior root. Each anterior root and its corresponding posterior root unite within the intervertebral foramen to become a spinal nerve.