Answer:
D. All of the above
Explanation:
The improving the well-being of people by altering their living situation. The environmental manipulation of a crop have unexpected consequences, All of the above .
What is environmental manipulation?The improving the well-being of people by altering their living situation, such as by setting an abused or late child in a foster home or by transferring an adult patient from a mental hospital to an adult home or a halfway house.
Thus, option "D" is correct, all the above.
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What role does the heart play in helping the circulatory system perform its functions?
Answer:
Blood circulates through a network of vessels throughout the body to provide individual cells with oxygen and nutrients and helps dispose of metabolic wastes
Explanation:
did this help
Bacteria are microscopic organisms that reproduce rapidly and often cause disease.
Antibiotics are drugs given to people to cure bacteria-caused diseases. Since the 1950s,
scientists have observed that antibiotics cannot kill many kinds of bacteria. What best
explains the reason why antibiotics are less effective now?
(10 Points)
O
People today do not take antibiotics as directed by doctors.
O
Antibiotics used today are weaker drugs than those used in the past.
O
The genes of some kinds of bacteria make them resistant to antibiotics.
O
Doctors have increased the testing of patients for diseases caused by bacteria.
Answer: The genes of some kinds of bacteria make them resistant to antibiotics.
Which of the following statements about weathering is true?
a. Physical and chemical are the two types of weathering.
b. Weathering occurs when rocks are subjected to the movement of wind or water.
Humans are the only cause of weathering.
d. Movement is required for weathering to take place.
Similar patterns of embryological development in different but related organisms are responsible for the formation of
Answer:
This question lacks options, options are:
a) homologous structures
b) analogous structures
c) Hox genes
d) intermediate fossil forms.
The correct answer is a.
Explanation:
Evolutionary theory predicts that related organisms will have similarities that come from common ancestors. Similar characteristics due to kinship are known as homologies. Homologies can be discovered by comparing the anatomical characteristics of different living beings, observing cell similarities and differences, studying embryological development, and studying the vestigial structures of the organisms themselves. Homologous structures are those that have a common origin regardless of the function they fulfill.
Answer:
Homologous structures
Explanation:
Homologous structures are structures that such as a part of the body, an organ or a gene that can be found or observed in organisms that have a shared ancestry.
Homologous structures for these organisms with shared ancestry can be found to be located at the same place and perform the same function in such organisms.
The DNA that codes for homologous structures is the same the organisms that have a common or shared ancestry.
For example:
A bat, a whale and an human have a common and shared ancestry which means that they are mammals. The homologous structures in these organisms are
Wings which bats use to fly, fins used by whales for swimming in the ocean and limbs in human. These homologous structure performs the same functions in each organism and that function is for movement.
Salivation is primarily controlled by nerves of the parasympathetic nervous system which release acetylcholine onto the acinar cells of the salivary glands. Salivation is primarily controlled by nerves of the parasympathetic nervous system which release acetylcholine onto the acinar cells of the salivary glands.
A. True
B. False
Answer:
True
Explanation:
Salivation or the secretion of the saliva through the salivary glands present in the mouth are controlled by the nervous system.
The primary nervous system involved in the salivation is the parasympathetic system of neurons. The parasympathetic system is involved in the rest and digest response of the body.
The parasympathetic system act by releasing acetylcholine in the acinar cells of the salivary glands. The acetylcholine binds to the receptors and causes a release of calcium. The calcium in the cell fuse with the membrane and thus saliva is released.
Thus, true is the correct answer.
A licensed hazardous waste materials hauler will dispose of used absorbent materials and will provide the proper documentation for your environmental file. A) True B) False
Answer:
A) True
Explanation:
Hazardous waste materials haulers are people that have been properly educated and well trained on the effect and various categories of hazardous waste to people and the environment as well as a proper way to dispose of the waste materials.
They also carry licenses that certify them as people who are permitted to dispose of hazardous waste materials.
Hazardous waste materials haulers also properly document any hazard that they come in contact with in the environment as well as proper documentation of hazardous waste materials that are transported.
After a major fire, grasses that are pioneer species start to grow in the ashy soil. The following list includes some of the ways that the grasses affect the ecosystem.
absorbing nutrients from the soil
absorbing water from the soil
providing food for animals
preventing erosion
Which of the items on the list contribute to ecological succession in the burned area?
Answer:
Providing food for animals
Answer:
preventing erosion and providing food for animals
Explanation:
Ecological succession is a process that starts with hardy pioneer species and leads to a diverse ecosystem. After a fire, the ashy soil is vulnerable to erosion by wind and water. Grasses prevent erosion so that the nutrients in the soil are still available for other plant species. By providing a source of food, grasses attract animals to the area.
Organisms that swim through water may have similar traits. For example, both dolphins and sharks have a dorsal fin, which helps the animal to stay upright and not roll over while swimming. Externally, the fins are similar. Internally, they are quite different. The latter observation suggests that is a case of what type of evolution?1. Convergent2. Divergent3. Adaptive radiation4. Allopatric
Answer:
Convergent
Explanation:
Convergent evolution is when different organisms evolve over a similar trait. Dolphins and Sharks both evolved over a similar trait but do not have a common ancestor, this is evidence of a convergent evolution.
Muhammad is a 72-year-old man who has problems with urinary retention. after an examination, muhammad's doctor explains that he has hyperplasia of his prostate gland that is restricting urine flow. which urinary structure is being affected by muhammad's hyperplastic prostate gland?
Answer:
Bladder
Explanation:
Prostatic hyperplasia is also known as prostrate gland enlargement, it causes blockage of urine flow out of the bladder which can eventually lead to bladder and kidney problem.
Answer:
When urine is accumulated in the bladder, it flows through nervous stimulation of urinary muscles controlling a tiny tube which connects the urethra to the penis to empty the bladder. This structure is called the urethra. it conducts both the sperm and urine out of the bladder through the penis for ejaculation and micturition
Therefore because of hyperplasia of the prostate, which leads to increase in mass of the prostate gland.The latter presses against the walls of the urethra, reducing its capillarity , restriction in urine flow,leading to retention of urine in the bladder.
Explanation:
Which of the following has the biggest impact on biodiversity in ecosystems?
a.) hatitat loss
b.)climate change
c.) invasive species
d.) overexploiting
Explain the relationship between cells, tissues and organs
Answer:
Cells are the smallest structural and functional unit of the Human body.
When a group of specialized cells perform a single job they form a TISSUE.
When a group of tissue carry out a particular function in the body they form the ORGANS.
Now when a group of organs perform the life process in the human body it constitute an ORGAN SYSTEM.
Explanation:
Cells are the basic units of life that pool together to form tissues. Tissues are groups of similar cells that perform a common function. Various types of tissues collaborate to form organs, each with a particular role in the organism.
Explanation:The relationship between cells, tissues, and organs stems from the hierarchical organization of the body, in which increasing complexity levels lead to multicellular organisms.
Cells are the basic units of life, capable of performing all vital functions. They can divide to create new cells and group together performing similar functions to form tissues.
Tissues are groups of cells performing a common function. Organs, however, are complex structures consisting of different types of tissues operating in concert to fulfill a specific job in the organism, like the heart pumping blood or lungs ensuring oxygen supply.
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What are the two ways macrophages are able to respond to invading germs?
Explanation:
Macrophages are effector cells of the innate immune system that phagocytose microscopic organisms and emit both expert incendiary and antimicrobial middle peopleThe macrophages assume a significant role in wiping out unhealthy and harmed cells through their customized cell death Macrophages are produced through the separation of monocytes, which transform into macrophages when they leave the bloodThere are two kinds of tissue macrophages such as macrophages that live inside explicit organs/tissue (free macrophages and fixed macrophages) and macrophages got from monocytes in response to inflammatory stimuliURGENT!!! A population of sixteen emu grew to thirty-nine in one year. After two years, the population had grown to forty-eight. The maximum number of emu that the environment can support is approximately sixty due to limited resources such as food and water. The carrying capacity of the emu population is .
A. Sixteen
B. Thirty Nine
C.Forty eight
D. sixty
Answer: D. sixty
Explanation: the answer is 60 or sixty
What is the tendency of an object to resist a change in its motion?
A. Velocity
B. Inertia
C. Gravity
D. Momentum
Answer: (BTW this is a Physics question) B, Inertia.
Explanation: Inertia, according to Newton's First Law (The Law of Inertia), is defined as an object's tendency to resist changes in its state of motion.
1. The process by which organisms best suited to the environment survive is called
A natural selection
B equilibrium
c frequency
D coordinated stasis
Answer:
Natural selection
As herds of cattle graze (eat grass in a field) they cause ground movements that bring insects to the surface. Birds use this opportunity to feed on the insects brought above ground. what type of symbiolic relationship?
In the cell cycle during which phase does the cell prepare for mitosis?
A. cytokinesis
B. G1 phase
C. anaphase
D. G2 phase
Answer:
the answer is A
hope this helps
Organelles protect a cell by Select one:
A. sequestering biochemicals that could dismantle other cellular structures.
B. forming a thick outer barrier.
C. containing powerful enzymes that kill any bacteria that enter.
D. producing new DNA if the genetic material is damaged.
Explanation:
the answer is B
it provides boundaries for the cell to protect it from the environment and regulate the passage of wastes
What muscle is responsible for contraction of the urinary bladder during micturition?
Answer:
Detrusor & Urethra
Explanation:
The major contractile muscle of the bladder is the detrusor. Urination involves either sustained contractions or short intermittent contractions of the detrusor along with contraction of the muscles in the urethra, the duct from the urinary bladder that conducts urine from the body.
In spite of hundreds of millions of dollars spent on insecticides targeted at pest species, such as mosquitoes and crop pests, we have been unable to drive any to extinction. On the other hand, bird, fish, plant, and insect species that we barely recognize have gone extinct. This has mainly been due to:
A) huntingB) farmingC) insecticides such as DDTD) habitat destructionE) scientific collecting
Answer:
E) scientific collecting
Explanation:
The main reason for bird, fish, plant, and insect species going extinct is habitat destruction, with examples such as the passenger pigeon and the dusky seaside sparrow. Overhunting, pollution, and pesticide use, notably DDT, have also contributed to extinctions, while pest species often demonstrate resilience, option C is correct.
Despite the intensive use of insecticides, we have not driven pest species like mosquitoes and crop pests to extinction. However, many non-pest species have become extinct due to human actions. The primary reason for the extinction of bird, fish, plant, and insect species is habitat destruction. A classic example is the passenger pigeon, which was once abundant in North America but was driven to extinction by overhunting and habitat destruction in the 1800s. Similarly, the dusky seaside sparrow was declared extinct in 1990 mainly due to habitat destruction and the impact of the pesticide DDT.
Overall, habitat destruction, which includes the transformation of natural environments into agricultural land and urban areas, poses the most significant threat to biodiversity. The continuous decline in biodiversity is also exacerbated by pollution, the propagation of invasive species, and climate change impacts. Ironically, many species considered pests are adaptable and resilient in the face of human efforts to manage them through chemical means, while more vulnerable species suffer unintended consequences.
Auroras are lights that appear at earths northern and southern poles. What is the main cause of an aurora
Answer:
A.
Explanation:
When charged particles from the sun strike atoms in Earth's atmosphere, they cause electrons in the atoms to move to a higher-energy state. When the electrons drop back to a lower energy state, they release a photon: light. This process creates the beautiful aurora.
Archaebacteria means... A ancient bacteria B spider bacteria C building bacteria D spiral bacteria
Answer: A. ancient bacteria
Explanation: microorganisms that are similar to bacteria in size and simplicity of structure but radically different in molecular organization. They are now believed to constitute an ancient intermediate group between the bacteria and eukaryotes.
The Neanderthal skeleton known as the "old man" showed evidence of many injuries over a long life. Several broken bones had healed, and almost all of his teeth had fallen out. What does this most likely indicate?
Answer:
It has been suggested that these kinds of lesions may be indicative of fighting with other members of its species or the attacks of predators
Explanation:
The Neandertals were exposed to very hard environmental conditions, thereby these lesions may be indicative of such conditions to which this species was exposed.
if snakes were removed from this food web, what would probably happen to the grasshopper population
Answer:
If snakes were removed the grass hopper population would increase
Explanation:
If snakes went there to eat the grass hoppers more grass hoppers would be alive cause of course theres not that much to eat them
-A population of birds with various size beaks eats seeds. Small seeds can be eaten by birds with small beaks. Larger,
thicker seeds can only be eaten by birds with larger thicker beaks. During a drought, only large thick seeds exist so only
the large, thick-beaked birds survive.
is it directional, disruptive or stabilizing selection
Answer:
Directional selection
Explanation:
The conditions of the environment change over time. These changes bring about the adaptation or not of species, hence, bringing about SELECTION. Selection is of different types but based on the example given in the question, DIRECTIONAL selection suits the description best. Directional selection is a kind of selection that occurs when an environmental change causes species with a particular phenotypic characteristics to be favored over the contrasting phenotype. Directional selection eventually results in the one-directional increase of species with a particular phenotype.
This is the case in this example involving a population of birds with different sizes of beaks (phenotype). The size of beaks determines the size of seed eaten by that bird i.e. small-beaked bird eats small seeds while birds with large and thick beaks eat large and thick seeds. A change in environmental conditions, which is drought, causes only large and thick seeds to be readily available. This means that only the birds with large and thick beaks can feed. Hence, the environment has selected or favored the birds with a large and thick beak over the ones with smaller beaks. This is an example of DIRECTIONAL selection because the selection goes in one phenotypic direction (birds with large, thick beaks).
The described situation is an example of directional selection, where the beak size in the bird population became larger due to selective pressures favoring larger beaks during a drought.
Directional selection occurs when one extreme phenotype is favored over others, causing the allele frequency to shift over time in the direction of that phenotype.
Before the drought, the bird population had a variety of beak sizes that allowed them to eat different types of seeds.During the drought, only large, thick seeds were available, which could only be eaten by birds with larger, thicker beaks.As a result, birds with smaller beaks died off, while birds with larger beaks survived and reproduced.Over time, the average beak size of the population increased as the genes for larger beaks became more frequent in the gene pool.complete question:
A population of birds with various size beaks eats seeds. Small seeds can be eatenby birds with small beaks. Larger, thicker seeds can only be eaten by birds with larger, thicker beaks. During a drought, only large thick seeds exist so only the large, thick-beaked birds survive. Does this so stabilizing selection, directional selection or disruptive selection?
Body cells include nerve cells and muscle cells. Each makes a number of different proteins. For example, nerve cells make cholinesterase and muscle cells make myosin. Which statement best compares the DNA normally found in these two types of cells in an individual?
(1) The two cells have identical DNA sequences and use the same section of the DNA to make these two proteins.
(2) The two cells have identical DNA sequences, but use different sections of the DNA to make these two proteins.
(3) The two cells have different DNA sequences, but use the same section of the DNA to make these two proteins.(4) The two cells have different DNA sequences and use different sections of the DNA to make these two proteins.
The DNA normally found in nerve cells and muscle cells is identical in sequence, but different sections of the DNA are used to make different proteins.
Explanation:The correct statement that best compares the DNA normally found in nerve cells and muscle cells is (1) The two cells have identical DNA sequences and use the same section of the DNA to make these two proteins.
All cells in the body generally contain the same DNA sequences. The differences between cell types, such as nerve cells and muscle cells, arise from the specific genes that are expressed or turned on in each cell. In this case, both nerve cells and muscle cells have the same DNA sequences, but they use different sections of the DNA to make different proteins.
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Homeostasis is NOT disrupted when a stressor triggers a nonspecific response because the body quickly adapts in order to function.
options:
True
False
Answer:
True
Explanation:
because the homeostasis controls the body to regulate itself.
Answer:
the answer is false.
Explanation:
Homeostasis IS disrupted when a stressor triggers a nonspecific response because the body quickly adapts in order to function.
What factor makes the Hawaiian Islands the perfect place for plant species to diversify? *
the volcanic soil and grounds are an extreme factor of having diversity in plant life. the air around the islands is also a little bit cleaner than air in nearby continents because the hawaiian islands are smaller so the amount of pollution is lower as well.
-ari.
Final answer:
The Hawaiian Islands are a prime location for plant species diversification due to their isolation, diverse ecosystems, and unique environmental conditions, leading to a high rate of endemism and evolutionary adaptation among plants.
Explanation:
The Hawaiian Islands represents a prime example of a location where plant species have diversified remarkably. This is largely due to the islands' unique geographical isolation, combined with a diverse range of ecosystems, such as alpine deserts, ocean coastlines, dry shrublands, and rainforests. The flora of Hawai'i is incredibly unique, with 88% of its species being endemic, found nowhere else on Earth. These conditions have created a hotspot for evolutionary diversification.
Plants originally reached Hawai'i by various means such as wind, birds, and ocean currents. Once there, they encountered a multitude of habitats which, coupled with the islands' isolation for 47 million years, allowed these early colonisers to evolve into a vast array of new species. The phenomenon of plants adapting to different environments and subsequently becoming new species through processes like self-pollination and fast growth has been significant in Hawai'i. An illustrative example includes a single colonist species in the Lobeliad group giving rise to 126 new species and in the Silversword alliance, where one species diversified into 30 new variants.
Additionally, human arrival introduced new plant species, further enriching Hawai'i's botanical diversity. This strong cultural connection to plants is evident in Native Hawaiian practices such as hula, medicine, and agriculture, highlighting the deep interconnectedness between the people and their natural environment.
Considerable evidence indicates that the null model of community structure is incorrect because _________.
a. each species responds independently of other species to the prevailing physical environment.
b. interactions among species have no significant influence on community structure.
c. when one species is removed, the populations of the other species are unaffected.
d. species interactions modify the fundamental niche of the species involved, influencing their relative abundance and, in some cases, their distribution.
Explanation:
Null model of community structure describes the communities which occur in the absence of a mechanism
Fundamental niche represents all the environmental conditions where a species is able to live or can live, there are no ecological barriers present in this type of niche
Species interactions modify the fundamental niche as a result distribution and abundance of species changes, ecological barriers comes into existence and fundamental niche changes into realized niche where species actually lives
________ prevents blood movement from right ventricle to right atrium
Answer:
Tricuspid valve: Allows blood to pass from the right atrium to the right ventricle; prevents blood from flowing back into the right atrium as the heart pumps (systole).
Explanation: