Answer:
Humans and Wildfire
Human-caused fires result from campfires left unattended, the burning of debris, equipment use and malfunctions, negligently discarded cigarettes, and intentional acts of arson. Lightning is one of the two natural causes of fires.
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Explanation:
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In chickens, FF produces extreme frizzle (very brittle and curly feathers), Ff has mild frizzle and ff has normal feathers. An extreme frizzle hen is mated with a normal rooster. What will the chickens look like? What will their genotype be?
Cross (parents):
Offspring will look like:
All of the genotypes will be
Answer:
if pure FF and pure ff marry, phenotypic ratio is all Ff or half-half
mild-ruffled feathers for all the chicks
Explanation:
makes sense
Which is an important source of carbon monoxide emissions that contributes to the greenhouse effect?
landfills
wetlands
vehicles
greenhouses
Explain the phenomenon you observe in the diagram. Provide as many details as possible to your explanation
Answer:
reflection
Explanation:
this is what is seen on the mirror
please answer the following questions correctly
Answer:
i. Name each of the parts labelled I, II, III, IV and V.
{5 marks}
I - Crown / Enamel
II - Dentine
III - Cement / Periodontal membrane
IV - Jaw bone / Root
V - Pulp Cavity
ii What is the function of each of the parts labelled I and III?
{2 marks}
I - Protects teeth from harmful bacteria
-- Enable teeth withstand pressure of chewing
-- Cutting / chewing / protects dentine / protect pulp cavity
III - hold tooth firmly (in socket / Jaw bone)
iii Which of the labelled parts could be affected by tooth decay?
{1 mark}
V - Pulp cavity
iv State three ways by which tooth decay may be prevented.
{3 marks}
→ avoid using sharp-pointed objects
→ avoid having dry mouth
→ use water containing fluorides to wash teeth / mouth
→ avoid smoking
→ the teeth should be cleaned regularly after each meal / remove food particle from the teeth / flossing
→ wash the mouth vigorously after each meal
→ regular visit to the dentist
→ avoid eating too hot foods
→ avoid eating too much sugary food
→ avoid eating too cold food / taking too cold drinks
Explanation:
This is the question I need help with.
Answer:
rodents
Explanation:
because they are closely related and have a more recent common ancestor. Hope the picture helps u to understand:)
Answer: D or Rodents
Explanation: Rodents have the same four limbs, Eukaryotic, have Vertabrae, and same Amniotic egg and hair/ fur, so they are the most closely related in this graph
3characteristics of good respiratory surface
thin walls.
a moist inner surface.
a huge combined surface area.
what you mean by accessory pigments?
Question 3
The difference between pectin an amylopectin is that
1. Pectin has more branching
2. Amylopectin has a - 1,4 glycosidic bonds and pectins have a - 1,6 glycosidic bonds
3. Amylopectin has more branching
4. Amylopectin has a - 1,4 glycosidic bonds and pectins have ß - 1,4 glycosidic bonds
The difference between pectin and amylopectin is that amylopectin has more branching than pectin.
What is pectin?"Pectin consists of a complex set of polysaccharides." This has a linear chains of α-(1–4)-linked D-galacturonic acid.This are mainly found in plants.This helps in binding cells together.What is amylopectin?"Amylopectin is a highly branched macromolecule composed mostly of α-(1→4)-d-glucopyranose units, with α-(1→6)-linkages at intervals of approximately 20 units."These are water insoluble.Hence, the correct option is 3. Amylopectin has more branching.
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What environmental factor was important for the
Cambrian "explosion of life”?
Answer: the earth was just starting to develop really well and well enough for life.
Explanation: atmospheric oxygen and oceanic calcium levels went up, but nobody needs to know that much facts about how earth developed, But the group called phyla started growing because of these conditions
Answer:
Explanation:
Tôi nghĩ rằng nếu quan trọng thời điểm đó phải là hình thành tầng ozon tạo tiền đề thiết lập hệ sinh thái
what is one way the gas giants differ from the terrestrial planets
what is one way the gas giants differ from the terrestrial planets?
ANSWERPlanets that are largely comprised of rock, such as rocky or terrestrial planets, are not like gas giants. Unlike rocky planets, gas giants lack a clearly defined surface there is no obvious line separating the atmosphere from the surface. The atmospheres of the gas giants are primarily hydrogen and helium.
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Wheat can vary in color from white to dark red depending on how much red pigment is present. Which genotype will produce the darkest wheat?
AaBBCC
aabbcc
AaBbCc
AABBcc
Answer:
AaBBCC
Explanation:
I think this is it. Hope it helps
A couple of questions about soil and agriculture in the image above. Help if you want
Answer:
1 Land resource is important because humans not only live but also perform all economic activities on land. Besides, land also supports wild life, natural vegetation, transport and communication activities.
2 Mineral. The largest component of soil is the mineral portion, which makes up approximately 45% to 49% of the volume. ...
Mineral. The largest component of soil is the mineral portion, which makes up approximately 45% to 49% of the volume. ... Water. Water is the second basic component of soil. ...
Mineral. The largest component of soil is the mineral portion, which makes up approximately 45% to 49% of the volume. ... Water. Water is the second basic component of soil. ... Organic matter. Organic matter is the next basic component that is found in soils at levels of approximately 1% to 5%.
Gases.
Microorganisms.
3 Loam soils generally contain more nutrients, moisture, and humus than sandy soils, have better drainage and infiltration of water and air than silt and clay-rich soils, and are easier to till than clay soils.
4 Soil organisms represent a large fraction of global terrestrial biodiversity. They carry out a range of processes important for soil health and fertility in soils of both natural ecosystems and agricultural systems.
5 Soils provide anchorage for roots, hold water and nutrients. Soils are home to myriad micro-organisms that fix nitrogen and decompose organic matter, and armies of microscopic animals as well as earthworms and termites. ... Soil plays a vital role in the Earth's ecosystem. Without soil human life would be very difficult.
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24) is it possible to know the genotypes of the three children in generation 111?
should their shapes be shaded? explain your answer to both questions.
Answer:
The genotype of all children in generation III is Hh. as H comes from dad and h comes from the mother for every case.
yes, their figures should be shaded.
reason :-
The dominant allele Fort this disease is shown by H whereas the recessive trait shown by h.
each offspring in generation III has the genotype Hh
and the presence of one dominant allele is enough to cause the disease.
all children in generation 3 suffer from the disease and so their figures should be shaded
The volume of air in the lungs is controlled by the
Does a computer have internal organization
Answer:
Yes, the operating system is the computers internal organization
Explanation:
a scientist begins working by trying to explain a natural occurence that is...
1. consistent
2. observable
3. In a lab
4. undetectable
Answer:
Observable
Explanation:
An observable phenomenon leads to an hypothesis.
Answer:
2. observable
Explanation:
The scientific method relies on a scientist being able to study an occurrence and understand it. So, all the occurrences must be observable; otherwise, they cannot be studied. If the patterns are observable then one can follow the scientific method and experiment with the different variables. All science depends on the observable world and the people that study it.
Describe the roles performed by the cell wall and cell membrane in a plant cell
Answer:
Cell membrane controls the substances that go in and out of the cell.
Cell wall keeps cell tugid and strong.
A principle that states in a sequence of undisturbed rocks, the oldest rocks are on the bottom
and the rocks become progressively younger toward the top
Choose from these answer:
(Superposition)
(Uniformity)
(Fault)
(Overfolding)
super position
Explanation:
because because it is arranged in a sequence
Plants are capable of using nitrogen directly from the atmosphere.
True False
strenuous exercise leads to muscle cramp give reason
Explanation:
Cramps can have causes that aren't due to underlying disease. Examples include dehydration, strenuous exercise or lack of muscle use.
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Answer: Lactic acid
Explanation: The acid is caused by anaerobic respiration, which you do when you do not get enough oxygen
By the end of this lab, you will see how some materials diffuse through a semipermeable membrane but others do not. The materials that you examine will differ in molecule size . Some will be larger and some smaller . Formulate an investigative question for this situation .
Answer:
Due to their sizes.
Explanation:
Some materials diffuse through a semipermeable membrane because of their small size which can pass through small pores present in the semipermeable membrane of the cell while on the other hand, some molecules can't diffuse through semipermeable membrane of the cell due to its large size. Glucose, oxygen and sodium are the examples which are smaller in size and can diffuse through semipermeable membrane whereas fats, carbohydrates and proteins are big in size so it can diffuse through semipermeable membrane of the cell.
Answer:
What is the effect of molecule size on a molecule's ability to diffuse across a semipermeable membrane?
Explanation:
here’s the proof… you’re welcome
Write about the structure and the purpose of Fat or Lipids.
Answer:
A lipid is any of various organic compounds that are insoluble in water. They include fats, waxes, oils, hormones, and certain components of membranes and function as energy-storage molecules and chemical messengers.
Which is an endocrine function?
Answer:
Explanation:
The endocrine system is a messenger system comprising feedback loops of the hormones released by internal glands of an organism directly into the circulatory system, regulating distant target organs. In vertebrates, the hypothalamus is the neural control center for all endocrine systems. In humans, the major endocrine glands are the thyroid gland and the adrenal glands. The study of the endocrine system and its disorders is known as endocrinology.
If the PH or the temperate where the enzyme is located changes, the enzyme is very likely to
denature (become inactive/ stop working)
True
False
Answer:
very true
Explanation:
they dont like change:)
Enzymes are proteins that help speed up metabolism, or the chemical reactions in our bodies.
If the PH or the temperate where the enzyme is located changes, the enzyme is very likely to denature is a true statement.
What are enzymes?The enzymes show the best activity at optimum temperature and pH. When there is a change in the temperature, the structure of the enzyme is changed.Any change in the temperature or pH will result in the breaking of the peptides or disulfide bonds. This will disturb the tertiary structure of the enzyme. At the lower temperature, the enzymes get deactivated while, at a higher temperature, it gets denatured.Thus, we can conclude that the correct option is True.
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Some species form social groups only with members of the same gender. For example, elephants form groups with only females and their offspring. Once the male offspring reach a certain age, they leave the group and become solitary.
Which is a benefit of this type of social group structure?
Females do not have to compete for a mate.
Male offspring can belong to more than one social group.
Adult males can mate with females in several different social groups.
Females are the only ones responsible for taking care of the offspring.
Answer:
Females do not have to compete for a mate.
Explanation:
Due to grouping of animals, females do not have to compete for a mate because each group has its own male. They have a male with which she mate and produce fertile offspring and has a complete family so we can say that the benefit of such type of social group structures is that females do not have to compete for a mate in the population as compared to other animals.
Answer:
A. female's do not have to compete for mates.
Explanation:
What is the role of RNA polymerase?
Answer:
RNA polymerase is an enzyme that is responsible for copying a DNA sequence into an RNA sequence, duyring the process of transcription.
Explanation:
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When people receive organ transplants, they often need to take medications that decrease immune responses because * 2 points D. transplanted organs produce their own antibiotics B. antigens present in these organs attack antibodies already present in the blood C. hormones present in replacement organs prevent the synthesis of antibiotics A. transplanted organs contain antigens that can trigger white blood cell activity
Answer:
The correct answer is A. transplanted organs contain antigens that can trigger white blood cell activity
Explanation:
The body's immune system is designed to seek out and destroy any foreign object it finds in the body, such as a cold or flu virus - or a transplanted organ. The process of destruction of the transplanted organ is called rejection.Immunosuppressive drugs will be provided to prevent your immune system from damaging the transplanted organ. Organ transplants require the use of immunosuppressive drugs capable of controlling the immune response triggered by the presence of antigens foreign to the body itself. The group of immunosuppressants is made up of drugs indicated both in the prevention of rejection of the transplanted organ and in its reversal.
Which structures are found only in plant cells, not in animal cells?
- [ ] A and B
- [ ] B and C
- [ ] C and D
- [ ] D and A
Answer:
answer is b and c
Explanation:
they have different cells, and chloroplast is only in plant cell
The difference between the bats in the United States with the Pd fungus and bats found in Europe and China with the Pd fungus was that A. the bats in the United States were immune to the fungus. B. the bats in the United States had a more deadly form of the fungus. C. the bats in Europe and China were dying at a faster rate. D. the bats in Europe and China were healthy.
Answer:
The correct answer is - D. the bats in Europe and China were healthy.
Explanation:
The white-nose disease of bats is caused by the Pseudogymnoascus destructans or Pd fungus that found in cold mines and caves of the bat. It is a fatal disease that leads to the destruction of the bat population in the United States, in north Calorina the population was dropped up to 99 percent. The bats found in Europe and China with the Pd fungus were healthy and do not cause any fatal disease in the population.
Which of the following is an example of a point source of population?
A. deforestation leads to soil erosion, which empties into a pond.
B. animal manure washed from a farm enters a stream.
C. an industrial waste pipe discharges water into lake.
D. storm water from street surfaces runs into river.