Answer:
I'm pretty sure its true
Explanation:
sorry if its not
Atoms with certain characteristics are radioactive. which of those below will always be radioactive?
Answer:
All atoms with an atomic number over 83
Explanation:
The electromagnetic repulsion of the protons in the nucleus is overcome by strong nuclear forces that keep the nuclear particles together. However, as the atomic number gets bigger so does the size of the nucleus. Therefore, the repulsive electromagnetic forces become greater than the nuclear forces hence the atom becomes unstable. Instability of the nucleus means the atoms become naturally radioactive.
Answer:
B.
all atoms with an atomic number under 40
Explanation:
just did it
Identify the organ in the digestive system responsible for producing bile, and for detoxifying molecules absorbed from the digestive system into the blood.
gallbladder
pancreas
duodenum
liver
Answer:
Liver
Explanation:
The liver produces bile and detoxifies the body.
Answer: Liver
Explanation: The liver's main job is to filter the blood coming from the digestive tract, before it is distributed to the rest of the body. The liver also detoxifies chemicals and metabolizes drugs. when it does this, the liver secretes bile that ends up back in the intestines.
An inversion in a human chromosome often results in no demonstrable phenotypic effect in the individual. What else may occur?
Answer:
Some abnormal gametes may be formed
Final answer:
A chromosome inversion can result in a mostly unaltered phenotype if it doesn't disrupt gene sequences. However, in heterozygotes, it can cause meiotic issues leading to decreased fertility, while homozygotes typically do not experience such issues. Some inversions can contribute to species evolution.
Explanation:
When a chromosome inversion occurs, it involves the detachment, 180° rotation, and reinsertion of part of a chromosome. This type of genetic rearrangement generally does not affect the individual's phenotype if it does not disrupt a gene sequence. However, in the case of heterozygotes, this can lead to issues during meiosis, creating a significant number of unbalanced gametes, and consequently a decrease in fertility. On the other hand, homozygotes for the inversion do not experience these problems, as their chromosomes pair normally without the formation of loops. Additionally, certain inversions, such as the one found on chromosome 18, can contribute to the evolution of new species, marking their significance beyond the individual level.
Bioinformatics includes all of the following except __________.
Answer:The correct option is C.
Explanation: The options attached to this question are given below:
A) Using computer programs to align DNA sequences.
B) Analyzing protein interactions in a species.
C) Using molecular biology to provide biological information to a system so that it gets expressed.
D) Development of computer-based tools for genome analysis.
E) Use of mathematical tools to make sense of biological systems.
Bioinformatic is an interdisciplinary field that deals with the collection and analyzing of complex biological information. Bioinformatic is useful for many reasons. For instance, in molecular biology, bioinformatic technique makes it possible for scientists to extract useful information from very large complex data. Bioinformatic techniques can be used to carry out all the processes given in the options with the exception of option C.
What are the effects of soil pollution?
Direct contact with pollution soil can cause problems, respiratory problems, and _______
A) cancer B) hearing loss C) speech interference in human beings. ________ A) digging
B) mining C) drilling often contaminates the soil with harmful chemicals, affecting terrestrial life adversely.
Answer:
A) cancer
B) mining
Explanation:
Unfortunately the soils nowadays are very often contaminated. The contamination comes from multiple different sources, industry, mining, chemicals used in the agriculture etc. All of them cause serious damage to the living organisms, be it plants, animals, or humans. A direct contact with soil that has been contaminated with certain metals can even cause cancer. The mining is one of the biggest polluters of the soil. In the process of mining, lot of toxic chemicals are released in the surrounding area, mostly contaminating the soil and the water, and making them totally unusable for prolonged period of time.
Direct contact with polluted soil can lead to issues such as respiratory problems and A)cancer in humans. Additionally, B)mining often contaminates soil with harmful chemicals, adversely affecting terrestrial life.
Soil pollution occurs when the soil is contaminated by harmful chemicals, leading to significant health problems such as cancer, and negatively impacts the environment by reducing biodiversity and agricultural productivity. Mining is a common cause of soil contamination. These issues highlight the importance of preventing soil pollution.
Effects of Soil Pollution:
Human Health: Direct contact or secondary contamination (via polluted groundwater or food grown in contaminated soil) can cause serious health issues, including cancer.Environmental Impact: Soil pollution can result in loss of biodiversity, lower bird and insect populations, and reduce the ability of many organisms to thrive.Economic Consequences: Contaminated soil reduces agricultural productivity and can lead to increased healthcare costs and environmental cleanup expenses.Knowing the type of food consumed by an organism helps to identify the role of the organism in the community. This role is known as its
Answer:
Niche
Explanation:
Niche refers to adaptive features of an organism, its activity pattern and consumption of resources in the system.
Niche of an organism refers to its habitat, activity role and functional position within system. It includes the resources such as food that it obtains from the habitat for its survival.
This organelle conducts respiration for the cell. It is also called the powerhouse of the cell. What is this organelle?
Answer:
Mitochondrion
Explanation:
Mitochondria are membrane-bound organelles of eukaryotic cells that generate power by converting energy into forms that are usable by the cell during the process of cellular respiration (Krebs cycle and electron transport chain with oxidative phosphorilation). The energy in the form of ATP that is produced within mitochondrion is required to perform many processes of the cell such as cell division, growth, and cell death.
Mitochondria have oval shape and are enveloped by a double membrane, outer and inner membrane. The inner membrane is folded creating structures known as cristae. Mitochondria are organelles that contain their own DNA-mitochondrial genome.
The energy that excites the photosystems is supplied by
Answer:Light energy enters the process of photosynthesis when pigments absorb the light. In plants, pigment molecules absorb only visible light for photosynthesis. The visible light seen by humans as white light actually exists in a rainbow of colors. Certain objects, such as a prism or a drop of water, disperse white light to reveal these colors to the human eye. The visible light portion of the electromagnetic spectrum is perceived by the human eye as a rainbow of colors, with violet and blue having shorter wavelengths and, therefore, higher energy. At the other end of the spectrum toward red, the wavelengths are longer and have lower energy.
Final answer:
Light supplies the energy that excites chlorophyll molecules in photosystems during the process of photosynthesis. This energy transfer initiates electron excitation necessary for the light-dependent reactions, with electrons in Photosystem II being sourced from the splitting of water.
Explanation:
The energy that excites the photosystems is supplied by light. In the process of photosynthesis, light energy is captured by chlorophyll molecules within the photosystems. Specifically, photons are absorbed by chlorophyll, which then transfers the energy to the primary electron acceptor. This energy then excites electrons, which in Photosystem II are sourced from the splitting of water, resulting in the release of oxygen. In Photosystem I, the excited electron comes from the chloroplast electron transport chain. Both photosystems, which contain a light-harvesting complex and a reaction center, absorb different wavelengths of light and are involved in different stages of the light-dependent reactions of photosynthesis.
Which is an example of a vestigial structure?
a. fish gills
b. human arm
c. raccoon tail
d. whale pelvis bone
Answer:D. Whale Pelvis Bone
Explanation:Structures that have no apparent function and appear to be residual parts from a past ancestor are called vestigial structures.
Examples of vestigial structures include the human appendix, the pelvic bone of a snake, and the wings of flightless birds. Hope this helps
Answer:
Whale Pelvis Bone
Explanation:
Apex...
The chemical breakdown of hydrogen-containing compounds requires an input of energy. true or false
The answer is true if I am correct
Answer:
True
-------------------------------------------------------------------------------------------------
'-'
Deep inside landfills, bacteria decompose organic wastes in a low oxygen environment. this anaerobic decomposition results in a mix of gases called landfill gas, which consists of about 50% ________.
Answer:
Methane
Explanation:
Methane is a greenhouse gas considered more potent than carbon dioxide in creating a greenhouse effect. Landfills also produce carbon dioxide gas. Therefore, measures are usually taken on landfills to prevent global warming. Such measure includes; capturing and collection of the gas and the use of methanotrophs bacteria on the soil over the landfills to convert the produced methane into organic compounds.
Answer:
During anaerobic decomposition, the composition of a the byproduct of this process called landfill gas is approximately 50 percent methane and 50 percent carbon dioxide with trace amounts (<1 percent) of nitrogen, oxygen, hydrogen sulfide, hydrogen, and nonmethane organic compounds
Explanation:
Landfill gases are produced when bacteria break down organic waste.
Landfill gas is a mixture of hundreds of different gases. By volume, landfill gas typically contains 45% to 60% methane and 40% to 60% carbon dioxide. Landfill gas also includes small amounts of nitrogen, oxygen, ammonia, sulfides, hydrogen, carbon monoxide and other gases.
Driving too fast for conditions or exceeding the posted speed limit can kill you.
a. true
b. false
The answer is true
This driver error was the cause, 21 percent occurred from going too fast for road conditions. Speeding also increases the likelihood that a crash will result in injury. ... Teens driving 40 mph in a 30 mph zone may think they're “only” going 10 mph over the posted speed limit.
The answer is A true because you can get in a really bad accident
Name three factors that are important in promoting venous return
1.The presence of valves 2.the milking action of skeletal muscles 3. the veins as the muscles contract
Venous return is the rate of back flow of blood to the heart. It mainly depends upon the factors such as blood volume, blood pressure, and the cardiac suction.
What is Venous return?Venous return is the rate at which blood flows back to the heart. It limits the cardiac output. Superposition of the cardiac function curve in an organism and venous return curve are used in hemodynamic model preparation.
Peripheral venous pressure is the pressure in the peripheral veins of the body which drains the body organs and tissues. It is the pressure differential between the peripheral and central veins which determines the venous return.
Venous return is facilitated by a number of different factors, including inspiration, increased blood volume, cardiac suction effect, the presence of venous valves and the skeletal muscle pump of the body.
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A small town in New Mexico discovers that a chemical plant outside of town recently learned that one of their underground pipelines had broken without their knowledge and had been leaking a toxic organic compound for over a month. The spill occurred 5m below the surface in a sandstone above a thin shale bed in the local bedrock. The beds are flat lying and this shale crops out 200m from the chemical plant. The town gets is water from deep wells, about 300m deep. What should the town worry about from this spill?
The major concern for the town in the described scenario is that the freshwater they use from the wells may get polluted by toxic organic compounds that will make the water unsafe and dangerous for usage. The toxic organic compounds have been released for a whole month bellow the surface in a sandstone layer. The sandstone is very easy to penetrate through, so the toxic matter will easily go down through it. As it reaches the lower layers, the shale bedrock comes as the only barrier between it and the freshwater used from the wells. The shale is a soft sedimentary rock, so with enough accumulation of the toxic organic compound it will soon have cracks and the toxic matter will reach the water. Once it mixes with the water, it will pollute it, thus making the deep wells unusable, and the people from the town will be left without their primary source of freshwater which can turn into a catastrophe.
A protein may consist of as many as _____ amino acid molecules.
a)500
b)2,000
c)5,000
d)48
2000 is right answer if not sorry
A protein may consist of as many as 5,000 amino acid molecules.
Answer:c
What is the molecular formulas for penicillin, adenosine triphosphate, cholesterol, testosterone, and phenylalanine.
Answer:
Penicillin Molecular Formula: C16H18N2O5S
adenosine triphosphate Molecular Formula: [tex]C10H12N5O13P3^{-4}[/tex]
cholesterol Molecular Formula: C27H46O
testosterone Molecular Formula: C19H28O2
phenylalanine Molecular Formula: C9H11NO2
Explanation:
A DNA molecule has the sequence GCATCCGA. What is the mRNA sequence resulting for this DNA code ?
A. CCTAGGCT
B. CGTAGGCT
C. CGUAGGCU
D. GCATCCGA
Answer:
the answer would be C
Explanation:
the letters are just the oppiste except for A and U
What structure receives blood from the efferent arteriole of a juxtamedullary nephron?
Answer:
The glomerulus.
Explanation:
The glomerulus receives blood from the efferent arteriole of a juxtamedullary nephron. It is also, the network known as a tuft, of filtering capillaries, located at the vascular pole, of the renal corpuscle, in Bowman's capsule. Each glomerulus, receives its blood supply, from an afferent arteriole, of the renal circulation. This is the correct answer to this question.
Hope this helps!!!
Kyle.
The efferent arteriole of a juxtamedullary nephron supplies blood to the vasa recta, which is a network of peritubular capillaries that surrounds the loop of Henle in a juxtamedullary nephron.
Explanation:The structure that receives blood from the efferent arteriole of a juxtamedullary nephron is called the vasa recta. This peritubular capillary network surrounds and interacts with the nephron. The efferent arteriole exits the glomerulus and forms this capillary network. In juxtamedullary nephrons specifically, this peritubular capillary network forms a network around the loop of Henle, hence known as vasa recta. These peritubular capillaries, including vasa recta, play a crucial role in reabsorption and secretion processes during urine formation.
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Single strand as a template plus 3 prime end to start DNA synthesis. A diagram shows a template strand of DNA as a sequence of bases. On the 3 prime end is an OH. A 3-base primer is attached to the 3 prime end of the DNA template via complementary base pairing; the 5 prime end of the primer lines up with the 3 prime end of the template DNA. An OH is also on the 3 prime end of the primer. Toward the 5 prime end of the DNA template, polymerase works, and DNA synthesis proceeds. The template DNA sequence is (3 prime to 5 prime): G A A T C T G C T G; the primer attached to the three prime end of the template reads (5 prime to 3 prime): C T T. Refer to the figure associated with this question. What bases will be added to the primer as DNA replication proceeds? The bases should appear in the new strand in the order that they will be added starting at the 3' end of the primer.
Cttagacgac is the answer
During which year does one of the projections show the human population reaching carrying capacity?
A. 2045
B. 2020
C. 1960
D. 2080
A 2045 would be the year we would reach capacity
Answer:
The correct answer is option A. "2045".
Explanation:
Many environmental scientist have the projection that the Earth has a maximum carrying capacity of 9 billion to 10 billion people, which would mean that at the point the resources of the Earth would start to decline. By 2045 it is projected that global population will reach nine billion people, therefore, it is believed that by that year the human population would reach its carrying capacity.
Why are birds that inhabit areas with high acid deposition more likely to lay eggs with thin shells?
a.acid deposition acts as an endocrine disruptor that interferes with reproductive hormones in bird species.
b.high rates of cancer due to acid deposition impact birds ability to form eggs.
c.in acidic soils calcium, an important nutrient for eggshell production, washes away and so less is available to birds in their diets
d.acid deposition increases the effects of ddt which has already been implicated in thinning eggshells?
Answer:
C
Explanation:
When it precipitates, the acid in the soil becomes dissolved forming an acidic solution. The low pH solution dissolves the calcium ions in the soil washing them away in runoffs and also leaching them deeper into the soil. This depletes the calcium ions hence making them unavailable to the birds. Calcium intake is important in birds because the ion is a significant component of eggs shells (makes them strong and not brittle hence the eggs don’t break easily)..
The process of gene cloning involves the transfer of what between organisms?
Answer:
Part of DNA (genetic material)
Explanation:
DNA cloning, as a method in molecular biology, is used for the multiplication of gene (or other piece of DNA). It usually includes steps of DNA insertion into plasmid (prokaryotic circular piece of DNA). That plasmid is than introduced into bacteria via process called transformation.
The principal hormone secreted by the corpus luteum is
The main hormone secreted by the corpus luteum, a temporary gland in the ovaries, is progesterone. It readies the uterus for possible pregnancy and sustains it if fertilization occurs.
Explanation:The principal hormone secreted by the corpus luteum is progesterone. The corpus luteum is a temporary gland formed in the ovaries following the release of an egg during the menstrual cycle. Its main function is to secrete progesterone to prepare the uterus for a potential pregnancy. If no fertilization occurs, the corpus luteum degenerates, leading to a decrease in progesterone levels and the start of menstruation. Progesterone plays a vital role in maintaining the health of the pregnancy as well as preparing the body for childbirth.
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The corpus luteum, that develops post ovulation, primarily secretes progesterone. This hormone is vital for pregnancy as it supports endometrium development and halts formation of new ovarian follicles. It also inhibits GnRH, FSH, and LH production.
Explanation:The corpus luteum is an endocrine structure that develops in an ovarian follicle post ovulation. The principal hormone it secretes is progesterone. This hormone plays a critical role for the establishment and maintenance of pregnancy as it aids in further development of the endometrium and prevents new ovarian follicles from developing. In addition, progesterone inhibits the production of GnRH, LH, and FSH, which also helps maintain pregnancy. If pregnancy does not occur, progesterone levels decrease, causing the stratum functionals to slough off - a process we recognize as menstruation.
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100 points and Brainliest! Complete this punnett square. In the punnett square list the possible genotypes and the percent probability for each one. In the punnett square what percent chance of have homozygous recessive.
Here's what the punnet square should look like:
T t
T TT Tt
t Tt tt
There is a 25% (or 1/4) probability the offspring will have the TT genotype
There is a 50% (or 2/4) probability the offspring will have the Tt genotype
There is a 25% (or 1/4) probability the offspring will have the tt genotype.
Homozygous means the offspring will have either TT genotype or tt genotype (The Tt genotype is heterozygous). Recessive means the offspring will have the recessive trait, marked with a lowercase letter.
In this case, the homozygous recesssive genotype is tt and there is a 25% probability that the offspring will have this genotype.
I hope this helps you!
the whole answer is the image attached
Hope this helps. :)
In which way is biomass similar to fossil fuels?
Answer:Biomass includes wood and food crops such as sugarcane and corn, and also byproducts such as agricultural waste
Fossil fuels (coal, oil and natural gas) have played and continue to play a major role in transforming the world from an agricultural society to the modern industrial world we live in today. Fossil fuels produce electricity, and fuels for heating and transportation. They also provide petrochemicals used in industrial products and plastics.
Explanation:
Answer:
the answer is corn
Explanation:
Hope this helps ap 3x
My boss isn't willing to increase the number of vacation days we get each year. that means she doesn't care about our health. it's wrong not to care about employees' health. she should be replaced with someone who cares about employees' health."
Talk to someone higher than her in status in the job?
Final answer:
Decisions about vacation policies involve various factors; it is not solely a measure of how much employers care about employee health. Supporting employees in work-life balance and understanding the implications of workplace health is becoming increasingly important in modern businesses. Engagement and support from supervisors are crucial in encouraging employees to take their allotted time off.
Explanation:
The assertion that a boss who is not willing to increase the number of vacation days does not care about employee health may not be entirely accurate. There are various factors influencing decisions around employee benefits beyond just caring for employee well-being. However, it is true that there is a growing understanding in the business community about the importance of employee health and work-life balance.
In 2015, according to Project Time-Off, 55% of U.S. workers did not use all of their paid vacation time and as a result, a staggering 658 million vacation days were lost. Businesses are beginning to recognize that unhealthy habits like smoking or being overweight increase health care costs, which in turn affect the company's bottom line. Companies seek to motivate employees to work hard, be productive, behave ethically, and stay healthy. Managers, like your boss, who seek suggestions to make it easier for employees to balance work and nonwork demands, are taking steps towards valuing employee health. The pressures of workload, job security, and affordability of vacations contribute to the hesitance to take time off.
The notion that someone should be replaced for not increasing vacation days is a matter of company policy and employee negotiation. It is important to note that the feeling of support from supervisors can significantly influence an employee's decision to take that much-needed time off.
Cesium is a radioactive element which was released into the ocean after the Fuushima nuclear power plant meltdown in 2011. Cesium's half-life is 30 years, which means that for every unit of cesium, half of it will decay over 30 years. How does this affect the human populations that eat fish from this area?
A.) Cesium's half-life is relatively long, so biomagnification could become a concern.
B.) All of the cesium will decay in approximately thirty years; therefore, humans can just avoid eating the contaminated fish for thirty years.
C.) Cesium levels will be acceptable in a short time, so biomagnification is not a concern and humans can eat fish as normal.
D.) Cesium will only decay by half in fifteen years, so human populations should avoid eating fish in this area and avoid contamination
Answer: Option A
Explanation:
A cesium's half life is relatively long( 30 years) which is quite a long period. This element can enter the food chain of the marine ecosystem and can lead to biomagnification.
Bio magnification can be defined as the phenomenon in which there is an increases in the toxic concentration as we move up in the food chain.
Cesium can enter into plankton and form there the concentration of cesium will increase as we will move towards the upper side of the food chain.
Which scenario will result in offspring that have the greatest genetic diversity? A. A bacterium divides every 20 minutes leading to exponential growth in its population. B. A piece of a sea sponge breaks off, attaches in a new location, and grows into a new organism. C. A single-celled amoeba splits into two separate cells, resulting in a new organism. D. A female salmon lays eggs that are fertilized by a male salmon and hatch into new fish.
Answer:
D
Explanation:
i got it right on study island
Which chamber receives blood from all the body veins
Do you know if there is just 1 answer? I think it is both the left atrium and right atrium.
If just 1 answer, try right atrium
a layer of rock contains an index fossil that is 250 million years old. How old is another layer of rock with the same fossil 1,000 miles away?
A layer of rock contains an index fossil that is 250 million years old. The another layer of rock with the same fossil 1,000 miles away is 250 million years old.
What do you mean by index fossil?Index fossils are fossils used to define and identify geologic periods. Index fossils must have a short vertical range, wide geographic distribution and rapid evolutionary trends.
There are some types of index fossils which include Ammonites, Brachiopods, Graptolites, Nanofossils and Trilobites. Ammonites: The fossil of ancient marine animals is said to be known as an ammonite index fossil.
Index fossils are used to define geological periods. These fossils can be defined as "commonly found, widely distributed fossils that are limited in time span." If one finds an index fossil in a given layer, then one has bounds on the age of the layer.
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