Answer:
Explanation:
Australopithecina or Hominina is a subtribe in the tribe Hominini. The members of the subtribe are generally Australopithecus (cladistically including the genera Homo, Paranthropus,[2] and Kenyanthropus), and it typically includes the earlier Ardipithecus, Orrorin, Sahelanthropus, and Graecopithecus. All these related species are now sometimes collectively termed australopithecines or homininians.[3][4] They are the extinct, close relatives of humans and, with the extant genus Homo, comprise the human clade. Members of the human clade, i.e. the Hominini after the split from the chimpanzees, are now called Hominina[5] (see Hominidae; terms "hominids" and hominins).
While none of the groups normally directly assigned to this group survived, the australopithecines do not appear to be literally extinct (in the sense of having no living descendants) as the genera Kenyanthropus, Paranthropus and Homo probably emerged as sister of a late Australopithecus species such as A. africanus and/or A. sediba.
The terms australopithecine, et al., come from a former classification as members of a distinct subfamily, the Australopithecinae.[6] Members of Australopithecus are sometimes referred to as the "gracile australopithecines", while Paranthropus are called the "robust australopithecines".[7][8]
The australopithecines occurred in the Plio-Pleistocene era and were bipedal, and they were dentally similar to humans, but with a brain size not much larger than that of modern apes, with lesser encephalization than in the genus Homo.[9] Humans (genus Homo) may have descended from australopithecine ancestors and the genera Ardipithecus, Orrorin, Sahelanthropus, and Graecopithecus are the possible ancestors of the australopithecines.[8]
The generation of radioactive wastes such spent (used) reactor fuel, uranium mill tailings, and other radioactive wastes is a significant environmental hazard associated with nuclear power.
What impact of nuclear power, energy on the environment?Nuclear energy is still readily available, despite the fact that it isn't strictly renewable (since there is only a finite amount of uranium on Earth).
Additionally, even though using nuclear energy to produce electricity is a carbon-free process, building new nuclear energy facilities and mining the uranium fuel have their own environmental consequences.
For millions of years, these substances may continue to be radioactive and hazardous to human health. The trash that nuclear power generates is the most urgent environmental concern.
During the course of a nuclear power plant's operation, a few different types of radioactive material are created, most notably used reactor fuel and the tailings from uranium mills.
Therefore, These pose numerous risks to the health of both people and the environment if they are not handled and disposed of properly.
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The scientific method often begins by asking questions about the natural world. Which of the following is an example of a scientific question? (2 points)How does fertilizer affect plant growth?Whats the best species of fish?Which color is best for wall paint?Who is the fastest person on the planet?
Answer: I would say that the first question "How does fertilizer affect plant growth?" would be the scientific question.
Explanation: That is because all the rest of the questions are questions that cannot be proved or tested by experimenting or finding proof. They can only be answered by subjective answers (opinions). Each person's answer to those types of questions will most likely be different and varied and therefore not scientific
Which statement best describes both insulin and glucagon? They both provide structural support, but only insulin is a carbohydrate. They both store energy, but only glucagon is a carbohydrate. They are both hormones that regulate blood-sugar levels. They are both hormones that help fight disease.
Answer:
They are both hormones that regulate blood-sugar levels
Explanation:
Insulin is a hormone that controls the blood glucose level. It released in the blood stream when the glucose level increases after eating food. It is produces by pancreas, insulin helps the glucose to enter the body's cells where it can either be stored for future use or can be used for energy.
Glcogen is produced by alpha cells of pancreas, it is a peptide hormone. Its main function is to raise the concentration of fatty acids and glucose in the bloodstream. It is one of the main catabolic hormone of the body
As per the above mentioned statements, the option 'They are both hormones that regulate blood-sugar levels' is the correct answer.
Answer:
They are both hormones that regulate blood-sugar levels
Explanation:
just took the test
why do sporangiophores grow vertically whereas rhizoids grow downwards
Answer:
The sporangiophore grow vertically which is in an upward direction because it is positively phototrophic. This means that it grows towards the ray of light from the sun which is found above. This is usually due to the provision of solar(light) energy from the sun which is used for the photosynthetic processes of the plants
The rhizoides grow downwards because they are positively geotrophic. This means they grow according to the force of gravity which acts downwards.
what is biology
what is leaf
Biology : The scientific study of living
things
Leaf: The principle lateral appendage of the vascular plant stem,usually born above ground and specialized for photosynthesis
Explanation:
Answer:
Biology is the scientific study of living things.
Leaf is a structure on a plant that is attached to the stem.
Explanation:
Monosaccharides (simple sugars) are also called carbohydrates. Using what you have noticed and learned about the elements in monosaccharides and ratios of the elements, explain why the term carbohydrate is an appropriate term for this group of compounds.
Answer:
Carbohydrate is one of major macromolecule and nutrient that is required for the energy and structure of body of almost every organism. These contains three elements that are carbon, hydrogen and oxygen in the ratio of 1:2:1. The general formula of carbohydrates is Cm(H20)n, in complex sugars m and n can be different.
Monosaccharides are simple sugars basic unit of disaccharides and polysaccharides. the ratio of carbon, hydrogen and oxygen are 1:2:1. As chemical level, they contain carbon, hydrogen and oxygen so termed as carbohydrates.
Which of the following is not an example of a contact force
____ is the theory that living organisms are composed of organic compounds that contain a vital force that is not present in nonliving matter.
a. Evolution
b. Natural selection
c. Vitalism
d. Homeostasis
Answer:
The answer is between a or b
but I strongly suggest the option a.
Evolution is the answer
Which term means the crossing of two different species that share common genes? Group of answer choices hybridization mutation population recombination
Answer:
The correct answer will be option A (Hybridization ).
Explanation:
Hybridization seems to be the method of integrating various organisms different types to start creating a hybrid. A hybrid, or genetic defect, has been the outcome of human reproduction incorporating the characteristics of two individuals of different ethnicities, types, organisms as well as subspecies.Other preferences presented are not closely linked to either the contexts in question. So the answer to the above seems to be the correct one.
Which forms of muscular dystrophy are X-linked? a. Becker b. Duchenne c. Facioscapulohumeral d. A combination of Becker and Duchenne"
Answer:
The correct answers a and b.
The inheritance of Becker and Duchenne dystrophies are linked to the X chromosome.
Explanation:
Duchenne and Becker muscular dystrophies (DMD and BMD, respectively) are neuromuscular diseases characterized by progressive muscle atrophy and weakness, as a consequence of the degeneration of skeletal, smooth and cardiac muscles. Both muscular dystrophies are caused by mutations in the DMD gene, located on the X chromosome. This is the largest known human gene and it encodes a protein called dystrophin, which is expressed in muscle cells. The mutations responsible for DMD lead to a total absence of dystrophin, while those underlying DMB lead to an abnormal quantity and / or quality of the protein. In both cases it is common to find deletions of the gene.
A food chain consists of phytoplankton, zooplankton, shrimp, and herring. If the bacteria produces 173,000 kJm-2 year-1 of energy, the plankton contain 28,000 kJm-2 year-1 of energy, the shrimp contain 3,100 kJm-2 year-1 of energy, and the herring contain 150 kJm-2 year-1 of energy then what is the trophic efficiency between the primary and secondary consumers?
Answer:
The trophic efficiency between the primary and the secondary produces is 18.064 %
Explanation:
The trophic efficiency is the ratio or the fraction obtained by dividing the energy used for growth at a trophc level by the level of energy supplied at the the next lower trophic level.
The given parameters are;
The energy produced by the bacteria (primary consumer) = 173,000 kJ/(m²/y)
The energy contained in the plankton = 28,000 kJ/(m²/y)
The energy contained in the shrimp = 3,100 kJ/(m²/y)
The energy contained in the herring = 150 kJ/(m²/y)
Therefore, we have;
Energy supplied at the primary trophic level = 173,000 kJ/(m²/y)
The energy used for growth (contained) in the secondary trophic level (secondary consumer) = 28,000 + 3,100 + 150 = 31,250 kJ/(m²/y)
[tex]Trophic \ efficiency = \dfrac{Energy \ used \ for\ growth\ (Secondary\ consumer) }{ Energy \ Supplied \ (Primary \ consumer) } \times 100[/tex]
[tex]Trophic \ efficiency = \dfrac{31,250}{ 173,000} \times 100 = 18.064 \ \%[/tex]
Science can lead to the development of:
It’s important to know that science is:
What the answer to these. I really need help I have been stuck on it for 30 minutes
Answer:
Science causes the development of economy, health, infrastructure and education.
Science helps finding new knowledge and technologies.
Explanation:
Science can lead to the development of economy, health, infrastructure and education. The development in these fields makes the people of that society are more advanced due to education and having good health and financial conditions.
It’s important to know that science is a way to help in finding new knowledge and technologies. the new knowledge helps in finding new technologies which minimize the adverse affect of that technologies on the environment and also these technologies reduce human efforts and make our work easier.
What does permeable mean
Answer:
Permeable means a (material or membrane) allowing liquids or gases to pass through it
Explanation:
Most aquatic plant life can be found in the littoral zone. T or F?
Answer:
True.
Explanation:
The littoral zone has a greater biodiversity than the benthic zone because the littoral zone can support plant life.
Answer:
true
Explanation:
What kind of alcohol is best to kill the corona virus?
1.45%
2.70%
3.90%
4.85%
My face is burning my eyes are watery what do I do
Answer:
Applying lubricating eye drops to reduce redness and improve eye comfort. For very dry eyes, a doctor may prescribe lubricating eye drops or artificial tears. Applying a warm compress to the eyes. Make a compress by soaking a clean, soft towel in warm water and then placing it over the eyes.
Explanation:
Answer:
call 911 or use Google
Explanation:
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Rebekah is studying a molecule and trying to determine if it is DNA or RNA. Which kind of molecule is she studying? I NEED HELP PLZ PLZ PLZ
Answer: Rebekah is studying [C-nucleic acids].
Explanation: This is since both DNA (DeoxyriboNucleic Acid) and RNA (RiboNucleic Acid) contain nucleic acids, as their names show.
Answer:nucleic acid
Explanation:
Facts about human brain
Answer:
The human brain is the largest brain of all vertebrates relative to body size. It weighs about 3.3 lbs. The average male has a brain volume of 1,274 cubic centimeters. The average female brain has a volume of 1,131 cm3. The brain makes up about 2 percent of a human's body weight.
Explanation:
____refers to the exactness of a measurement whereas ____ refers to how close a measurement is to its actual value
Answer: precision and accuracy
Explanation:
Take for example a basketball. The goal is to put the ball on the hoop. By doing that you are accurate. But let's say you hit a certain part of the rim 10 times. That means you're really precise in hitting the exact spot.
Answer:
Explanation:
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Identify the factors that cause magnetic stripes to form along the ocean floor. Select the two correct answers.
1 . Magnetic direction of rock changes as Earth s
magnetic poles drift.
2. Magma acquires the magnetic direction present on Earth when it hardens into rock
3. Plates move as new rock forms which causes magnetic direction to skew away from normal
4. Rock forming at the
oceanic ridge pushes older rock outward in both directions.
The factors causing magnetic stripes are ''magma acquires the magnetic direction present on Earth when it hardens into rock' and 'rock forming at the oceanic ridge pushes older rock outward in both directions'.
In ocean floors, magnetic stripes can be exposed in the upper part of the walls of the fracture zones.
The magnetic stripes are a type of symmetrical pattern on both sides of the mid-ocean ridges, which can be used to determine the periodicity of reversals of the magnetic field.
The magnetic stripes generate as the oceanic crust pulls apart when the magma rises to the surface at mid-ocean ridges and generates new bands of the ocean floor.
In conclusion, the factors that cause magnetic stripes are ''magma acquires the magnetic direction present on Earth when it hardens into rock' and 'rock forming at the oceanic ridge pushes older rock outward in both directions'.
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Magnetic bands along the ocean are caused when magma acquires the magnetic direction present on earth when the rock hardens and when rock formation on the oceanic crest pushes older rocks outward in both directions, as shown in options 2 and 4.
We can arrive at this answer because:
Magnetic bands form along with the separation between oceanic crust and magma.This happens above the mid-ocean ridges, which allows renewal of the seabed, which expands and generates new bands.As the oceanic crust separates, magma rises towards the surface, spilling over mid-oceanic ridges.In this case, the magma acquires the magnetic direction present on Earth as it cools, hardens, and becomes a rock.These rocks push older rocks up and down, making room for the creation of magnetic bands along the ocean floor.
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Question 6 of 10
A scientist bred fruit flies in two separate containers with different food
sources for many generations. When she put the fruit flies from the two
containers together again, she observed that the flies preferred mates raised
on the same food. Which conclusion can the scientist draw?
A. Fruit flies prefer the container where they were bred.
B. Fruit flies mate randomly regardless of how they were bred.
Ο Ο Ο
C. Fruit flies can adapt to eating different food sources.
D. Fruit flies prefer mates adapted to the same food source.
SUBMIT
Answer:
D. Fruit flies prefer mates adapted to the same food source.
Explanation:
Food and diet varies depending on the location of an animal, that being said, it is in the nature of an animal to mate with another in order to produce offspring who can survive on the same food source. Instinctively, a fly would see a mate who's diet differed and think that their offspring would not be able to survive due to the lack of that varying food source.
Three species of lizard, labeled A, B, and C, are being studied using molecular analysis by two research colleagues in different laboratories. The mitochondrial DNA of lizards A and B are compared and are found to differ by 0.1%. The ribosomal RNA of lizards B and C are found to differ by 0.02%. They compare their findings and conclude that lizard B is more closely related to C than to A. What is the flaw in their reasoning, and how can their analysis be improved?
A.They applied different mathematical formulas for their computations. They should recalculate using the same formulas.
B'They compared different molecules which have different mutation rates. They should compare same molecule in the lizards.
C.They only made one measurement each. They should repeat their measurements to reduce the uncertainty in their results.
D.They used different equipment for analyzing the molecules since they work in different labs. They should work in the same lab.
Answer:
The correct option is B
Explanation:
The biomolecule used in comparing lizards A and B is the mitochondrial DNA while that used to compare the same lizard B to another lizard C is the ribosomal RNA (rRNA). They should have compared the same biomolecules throughout by extracting the mitochondrial DNA of the three lizards and then proceed to sequence the whole genome of the lizards. After which they can now do a Global alignment (comparison) of the three sequences together. This procedure would have given them a more accurate information on there identity and similarity.
Which category of signal exerts its effects on target cells by binding to membrane-bound receptor proteins
Answer: Neurohormones
Explanation:
Neurohormones are chemicals produced by neuroendocrine cells which behave like hormones. They are released into the bloodstream unlike neurotransmitters that are released into the synaptic cleft.
The same neurohorome can have both functions (hormonal and neurotransmitter). Hormones are chemicals produced by the endocrine glands that move through the body in the bloodstream. They control many biological processes, including muscle growth, heart rate, hunger, and the menstrual cycle. A neurotransmitter is a biomolecule that enables neurotransmission, i.e. the transmission of information from one neuron (a type of cell in the nervous system) to another neuron, a muscle cell or a gland, via the synapse that separates them. The neurotransmitter is released from the synaptic vesicles at the end of the presynaptic neuron, towards the synapse, through the synaptic space and acts on the specific cell receptors of the target cell.
So, a neurohormone is a biomolecule that, like the neurotransmitter and the hormone, is responsible for an exchange of information between cells. The neuroendocrine cells that secretes de neurohormones are, in turn, half neurons, half endocrines, and are found both in the Nervous System and in other parts of the body. They bind to receptors located on the membranes of other cells. Unlike neurotransmitters that interact only with other neurons, neurohormones also interact with other cells. When a neurohormone enters a cell and binds to its receptor, it causes the receptor to change shape, allowing the neurohormone-receptor complex to enter the nucleus and regulate gene activity. The binding exposes regions of the receptor that can bind to specific DNA sequences. These sequences are found next to certain genes in the cell's DNA, and when the receptor binds to them, it alters their transcription levels.
The most obvious case is catecholamines, formed in the adrenal glands by chromaffin cells, which are modified neurons and they are released directly into the blood. In turn, they are also produced by neurons and act at the synapses.
Which type of macromolecule is a product of
photosynthesis?
Answer:
During photosynthesis, the biological macromolecule glucose is produced. Glucose is a simple sugar that is made of carbon, hydrogen and oxygen.
The process whereby phosphorus is drained away into ground water is called
agriculture
decomposition
leaching
sedimentation
Answer:
When soluble soil nutrients from the soil are washed away due to to effects of rain,floods or irrigation from agricultural practices the process by which this occurs is called LEACHING. As water molecules pass through different soil layers,soluble soil minerals are dissolved and carried by the water into the ground water.
Phosphorus is a soluble mineral which is easily carried away by the passing water molecules,and therefore drained from plants' roots.
if these were leached into rivers and drinking water,this may affect the water supply of the community as the percentage of Phosphorus increases in the water especially if NPK fertilisers were used.
In addition, some important solid nutrients are also leached into the underground soil layer leading to deficiencies in the plants.
Explanation:
What are 3 negative effects of under nutrition
Answer:
low weight for age, poor appetite, irritability
Explanation:
be low is never fun it has alot of i.pact on our bodies physically but most of all mentally
All life on Earth is part of the Eukaryota domain, except:
-plants
-bacteria
-animals
-bugs
Answer:
Bacteria
Explanation:
Bacteria is a Prokaryote and all the others are Eukaryotes.
Answer:
bacteria is a procaryotes under the kingdom monera
What is the cause of the hydranencephaly? Select one: a. Aqueductal stenosis b. Subaranchoid stenosis c. Overproduction of CSF d. Internal carotid arteries blockage
Answer:
The correct answer is d.
Explanation:
Hydranencephaly is a rare congenital anomaly characterized by the absence and replacement of the cerebral hemispheres by cerebrospinal fluid and necrotic remains, with preservation of the membranes (leptomeninges), within a skull of normal capacity and shape. It is the most severe form of cortical destruction cerebral bilateral and is considered an extreme form of porencephaly (focal cystic cavity). It mainly affects the territory of the internal carotid artery and middle cerebral artery, with preservation of the territories supplied by the vertebrobasilar arteries. The most accepted etiology is carotid vascular insufficiency, due to multiple causes (bleeding, placental thromboembolism, arteritis, vascular malformations, among others).
The portion of the female reproductive tract in birds that directs the egg to the cloaca is the __________.
Answer:
overies
ovaries produce the egg cells, called the ova or oocytes. The oocytes are then transported to the fallopian tube where fertilization by a sperm may occur. The fertilized egg then moves to the uterus, where the uterine lining has thickened in response to the normal hormones of the reproductive cycle
___ capture energy and convert it into a usable chemical form. ____ cannot make their own food.
Autotrophs capture energy and convert it into a usable chemical form. Heterotrophs cannot make their own food.
What is the difference between Inorganic and organic compounds?
O A Organic compounds contain lonic bonds and inorganic compounds contain covalent bonds.
OB. Organic compounds are produced naturally and Inorganic compounds are human-made.
OC. Organic compounds contain carbon and Inorganic compounds do not.
OD. Organic compounds are beneficial to the environment and Inorganic compounds are not.
Answer:
[tex]\Large \boxed{\mathrm{Option \ C}}[/tex]
Explanation:
Organic compounds contain chemically bonded carbon atoms, sometimes even hydrogen atoms to form hydrocarbons, and inorganic compounds do not contain these atoms.
Answer:C
Explanation: