select all that apply fossils are assigned to the genus homo if they exhibit evidence for which of the following characteristics? multiple select question. bipedalism brain size of 600 cc or larger evidence of tool use forelimbs relatively long jaw and teeth similar to humans
Answers
The hominin fossil record shows a progression from quadrupedally (walking on four legs) to bipedalism. Early hominins such as Sahelanthropus and Orrorin had some adaptations that suggest they were bipeds, but they were not fully committed to this mode of locomotion.
The earliest confirmed bipedal hominin is Australopithecus afarensis, which lived about 3.6 million years ago. Since then, all hominins have been bipeds. Brain size of 600 cc or larger: One of the defining characteristics of the genus Homo is an increase in brain size compared to earlier hominins. Early Homo species had brain sizes of around 600 cc, while modern humans have brain sizes of around 1350 cc. Tool use and other complex behaviors are associated with an increase in brain size. Forelimbs relatively long:
The forelimbs of early hominins were shorter than those of modern humans, which suggests that they were less important for locomotion. However, they were still used for a variety of tasks, including tool use. In early Homo, the forelimbs became relatively longer, which may have been an adaptation to a more tool-dependent lifestyle. Jaw and teeth similar to humans: The jaw and teeth of early hominins were adapted to a diet of tough, fibrous plant material.
However, as hominins began to eat more meat and other foods that were easier to chew, their jaws and teeth became smaller. Tool use is an important characteristic of the genus Homo, and it is associated with an increase in brain size and other behavioral changes.
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Related Questions
how does an entire population become adapted to its environment
a. traits that help individuals survive and reproduce become more common in the population over successive generations
b. each new variation becomes an adaptation as the organisms learn to use it
c. a population chooses which traits will help it survive
d. individuals develop changes during their lifetime and pass good changes to their offspring
Answers
Breathing hard during exercise brings oxygen to your muscles, which helps the
___ process release
energy to fuel your workout.
(Oxidation, diffusion, or active transport)
Answers
Answer: Respiration
Explanation:
which kingdom do bacteria belong to?
Answers
Answer:
EUBACTERIA kingdom
Explanation:
explain the difference between an
autotroph and an heterotroph.
Answers
Answer:
The answer will be listed below.
Explanation:
Autotroph and heterotroph are two different terms. Autotrophs are producers, such as plants and other organisms that can produce their own food. Heterotrophs are consumers who consumes producers or other consumers to get their food. Examples include animals, people, and those who consume other things for energy.
Which statement explains why oxygen molecules easily diffuse across a cell
membrane while DNA molecules do not?
A. Oxygen molecules are more useful to a cell than are DNA
molecules.
O B. DNA molecules contain carbon atoms, while oxygen molecules
have only oxygen atoms.
C. Oxygen molecules are very small, while DNA molecules are very
large.
D. DNA molecules have phosphate groups that the cell membrane
repels.
Answers
Answer:
C.
Oxygen molecules are very small, while DNA molecules are very large.
the action potential of cardiac pacemaker cells is caused by
Answers
The action potential of cardiac pacemaker cells is caused by the slow influx of calcium ions into the cell during phase 0 of the pacemaker potential. Cardiac pacemaker cells are a type of specialized heart cells that generate and regulate the electrical impulses that regulate the heartbeat.
These cells are found in the sinoatrial (SA) and atrioventricular (AV) nodes of the heart .The cells of the sinoatrial (SA) node, commonly known as the heart's natural pacemaker, spontaneously depolarize in a rhythmic pattern, producing electrical impulses that spread throughout the heart. The process by which these cells depolarize is referred to as the pacemaker potential or the prepotential, which is caused by a gradual influx of calcium ions into the cell during phase 0.
The slow depolarization of the pacemaker potential eventually reaches a threshold, at which point voltage-gated calcium channels open, allowing a rapid influx of calcium ions into the cell, resulting in a full depolarization of the cell membrane. This process is what generates the action potential of cardiac pacemaker cells.
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The story of the evolution of early birds winds through the chapter as an example of the dynamic nature of science. Why is it likely the dinosaur-bird evolutionary tree will be modified again?
Choose one:
A. The fossil record is incomplete, so the relationship between birds and dinosaurs will never be resolved, leaving the evolutionary tree to always be questioned.
B. The process of science is one of continual discovery, and new information is likely to be discovered that could change our current understanding.
C. Because dinosaurs are extinct, the dinosaur-bird evolutionary tree can never be resolved.
D. Because of the rapid advancements in technology, DNA analyses will ultimately prove that birds did not descend from dinosaurs.
Answers
Answer: B the process of science is one….
Explanation:
The process of science is one of continual discovery, and new information is likely to be discovered that could change our current understanding. Option B is correct.
The process of scientific inquiry is characterized by its dynamic and evolving nature. This applies to fields such as paleontology and evolutionary biology, including the study of the evolution of early birds and their relationship to dinosaurs.
The fossil record is incomplete, and while it provides valuable insights into the history of life on Earth, it does not capture every species that ever existed. As new fossils are discovered and technologies improve, our understanding of the relationships between different species, including the evolution of early birds from dinosaurs, can change.
Advancements in technology have allowed scientists to gather more detailed information from fossils, perform more precise analyses, and even extract DNA from ancient remains. These technological innovations can lead to new discoveries and a better understanding of the evolutionary relationships among different organisms.
Additionally, the scientific community encourages skepticism and critical evaluation of existing theories. New evidence, whether from fossils, genetic studies, or other sources, can prompt researchers to reevaluate and modify their understanding of the dinosaur-bird evolutionary tree.
In conclusion, the dynamic nature of science, the ongoing discovery of new evidence, and the advancement of technology all contribute to the likelihood that the dinosaur-bird evolutionary tree will continue to be refined and modified as our understanding of the past evolves. This is a fundamental characteristic of the scientific process, which seeks to refine and improve our knowledge over time.
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Match the type of stress to the correct type of plate tectonic boundary.
Answers
Answer:
compression:convergent
tension:divergent
shear:transform
Living things use energy:
- for activities and bodily functions, like moving and
digesting
-as the building blocks of their bodies
-all of the above
Answers
Answer:
for activities and bodily functions like moving and digestion
Explanation:
It is because moving and digestion are energy requiring activities
extra information
cell is know as the building blocks of body
hope it helps u
Question 14 (2 points) The process of evolution that involves a change in the DNA sequence that leads to evolutionary change is called natural selection. O mutation. genetic drift. migration.
Answers
The process of evolution that involves a change in the DNA sequence that leads to evolutionary change is called a mutation.
A mutation is a sudden and lasting alteration in the DNA sequence that can influence genetic variation. Changes in the DNA sequence can influence phenotype, which may or may not have an effect on an organism's fitness. Mutations occur spontaneously, either from errors in DNA replication or from exposure to mutagenic agents. Mutations may happen in either coding or non-coding regions of the DNA, and they can be either silent or expressed.
Evolution is a natural process that results in the gradual change of inherited characteristics in populations over generations. It is the process of alteration in the inherited characteristics of species over successive generations. In other words, it is the process of gradual changes that happen to species over time as they adapt to their environments. It can be defined as a change in the gene frequency in a population over time.
Types of Evolution 1. Natural Selection 2. Genetic Drift 3. Gene Flow 4. Mutation 5. Non-Random Mating 6. Admixture 7. Mutation Pressure 8. Genetic Draft 9. Bottleneck and Founder Effect 10. Sexual Selection the process of evolution that involves a change in the DNA sequence that leads to evolutionary change is called a mutation.
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Water fluoridation and cancer risk in assessing whether fluoridated water can cause cancer, what do the national research council, national health service, and centers for disease control and prevention all agree on? osteosarcoma is so rare that there is little need to study the risk of fluoride. fluoride should not be added to water according to research from dentists. there is a need for further research.
Answers
Water fluoridation and cancer risk in assessing whether fluoridated water can cause cancer, osteosarcoma is so rare that there is little need to study the risk of fluoride. fluoride should not be added to water according to research from dentists.
What is fluoride?Fluorides are compounds formed by combining fluorine with another material, usually a metal. Fluoride monofluorophosphate, sodium fluoride, and stannous fluoride are a few examples. (MFP fluoride).
Some fluorides exist naturally in soil, air, or water, though fluoride levels can vary greatly. Fluoride is present in almost all water. Fluoride can also be found in plant and animal foods.
Fluorides are absorbed into the bloodstream through the digestive tract once within the body. They circulate in the blood and tend to congregate in calcium-rich tissues such as the bones and teeth.
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Answer:
there is a need for further research
Help help help
10. Which of the following is an example of codominance in genetic traits?
A) A tall pea plant and a short pea plant produce tall pea plants.
B) An orange cat and a black cat produce an orange-and-black kitten.
C) A blue-eyed man and a brown-eyed woman produce a blue-eyed child.
D) A color-blind woman and a man with normal vision produce a color-blind the
Answers
Answer:
B
Explanation:
Both phenotypes are observed.
at which phase of mitosis do the sister chromatids become daughter chromosomes?
Answers
Answer:
Anaphase
Explanation:
The two chromatids on a chromosome separate and move in different directions. The sister chromatids thus become daughter chromosomes (chromosomes of a chromatid), which are transported along the fibers of the spindle to opposite poles of the cell.
During anaphase of mitosis, sister chromatids of a chromosome split and begin to move in different directions.
What is mitosis?Sister chromatids split apart to form distinct chromosomes. Therefore, the answer is Anaphase.
Prophase, Metaphase, Anaphase, and Telophase are the four basic phases of mitosis. Some textbooks divide prophase into an early phase (named prophase) and a late phase, giving the number five (called prometaphase).
Cytokinesis, the act of dividing the cell contents to create two new cells, begins in anaphase or telophase, and these phases occur in strict sequential order.
Therefore, During anaphase of mitosis, sister chromatids of a chromosome split and begin to move in different directions.
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one way mistakes during the cell cycle could result in problems (G2)
Answers
Answer:
If cells that aren't genetically correct don't conduct apoptosis, it could cause cancers. Tumors are chunks of genetically incorrect cells. They could be incorrectly copied during mitosis.
a pressure injury was noted in the mucous membrane outside the urethra from a urinary catheter.
Answers
When a urinary catheter is inserted into the body, it can cause irritation and injury to the surrounding tissue and membranes. In this case, a pressure injury was noted in the mucous membrane outside the urethra from a urinary catheter.
The mucous membrane is a thin layer of tissue that lines various organs and body cavities, including the urethra. When this membrane is damaged or injured, it can cause discomfort and pain for the patient.
A pressure injury occurs when there is prolonged pressure on a particular area of the body. This can happen when a catheter is left in place for an extended period of time, causing pressure on the surrounding tissue. To prevent pressure injuries, it is important to regularly reposition the patient and ensure that the catheter is properly secured and not causing excessive pressure.
If a pressure injury is noted, it is important to take appropriate steps to prevent further damage and promote healing. This may include removing the catheter, providing wound care, and monitoring the patient for signs of infection. With proper care and attention, the injury should heal over time and the patient can recover without any long-term complications.
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When sunlight strikes a plant, the leaves capture most of that energy to use for photosynthesis. Which of these materials helps plants use energy from sunlight?
a. Chlorophyll c. Roots
b. Glucose d. Soil
Answers
Answer: A. Chlorophyll c. Roots
Answer:
chlorophyll
Explanation:
i did this and got it right
Assume you use a complete fertilizer containing urea, superphosphate, and potassium chloride. Describe what might happen to all the nutrients added. How might they be used, stored, or lost?
Answers
Fertilisers give crops vital nutrients like nitrogen so they may grow larger, more quickly, and yield more food.
However, using too much fertiliser can be harmful because it causes eutrophication and the emission of greenhouse gases.
Potassium (K)-rich fertilisers are regularly used to make up for plant deficiencies. Farmers must add this essential plant nutrient when soils are unable to provide crops with the K levels they require.When urea is added to the soil, it quickly turns into ammonium through a reaction with water and the soil enzyme urease.
The chemical reaction below illustrates this conversion, which is known as urea hydrolysis. The consumption of hydrogen ions (H+) in this reaction raises the pH of the soil close to the fertiliser.
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effective population size was estimated for a population of the common bait-stealing padre island blue-phased gaff topsail catfish. heterozygosity at neutral loci was found to be very high. from this we can infer that:
Answers
The high heterozygosity at neutral loci in the population of the padre island blue-phased gaff topsail catfish suggests that the effective population size (Ne) of the population is likely large.
Heterozygosity refers to the presence of different alleles at a specific genetic locus. In a large population with high genetic diversity, there is a higher chance of having multiple alleles at each locus, leading to increased heterozygosity.
Effective population size is a concept that takes into account factors such as genetic drift, migration, and selection, which can affect the genetic diversity of a population. A larger effective population size generally implies a more stable and diverse gene pool. Conversely, a smaller effective population size can lead to reduced genetic diversity, increased genetic drift, and increased susceptibility to the effects of inbreeding.
In the case of the padre island blue-phased gaff topsail catfish population, the high heterozygosity at neutral loci suggests that the population has a large effective population size. This indicates that the population is likely experiencing sufficient gene flow, minimizing the effects of genetic drift and maintaining high genetic diversity.
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What is the role of protein in a cell?
Answers
Answer:
Proteins are large, complex molecules that play many critical roles in the body. They do most of the work in cells and are required for the structure, function, and regulation of the body's tissues and organs. These proteins provide structure and support for cells. On a larger scale, they also allow the body to move.
Explanation:
three major roles of proteins are:
hormones. Many hormones are protein in nature; hormones control growth and metabolic activities of the body.
catalytic activities. Enzymes are globular protein.
Transport of oxygen.
Blood Clotting.
Immunity.
Muscles contractility.
What are the degradations made by detrital rocks?
Answers
Answer:
Sedimentary rocks can be organized into two categories. The first is detrital rock, which comes from the erosion and accumulation of rock fragments, sediment, or other materials—categorized in total as detritus, or debris. The other is chemical rock, produced from the dissolution and precipitation of minerals.
Explanation:
blame the internet if this is wrong
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The pedigree below tracks the presence of attached earlobes through a family's generation. Having attached earlobes is an autosomal recessive trait.
If individuals I-1 and I-2 had a fourth child, what is the chance that the child would have attached earlobes?
Choose 1 answer:
(choice A)
A
0%
(choice B)
B
50%
(choice C)
C
75%
(choice D)
D
100%
Answers
Answer:
100%
Explanation:
Answer:
itd be 50%
Explanation:
Will award 70 points!
Calculate the rate of photosynthesis(mm/hr) for Elodea if when measuring net photosynthesis, the water level moved up 5 min and, when measuring cellular respiration it took 20 minutes for the water level to move down 1mm.
63mm/hr
57mm/hr
67mm/hr
61mm/hr
52mm/hr
Answers
Answer:
Net photosynthesis- 3mm/20min- 1.5mm/10min
Cellular respiration- 1mm/15min- 0.66mm/10min
Gross photosynthesis = Net photosynthesis + Cellular respiration = 1.5+0.66 = 2.16 (mm/10min)
Rate of photosynthesis = (gross photosynthesis)6 = 2.16 *6 = 12.96 mm/hr
As we are measuring rate of photosynthesis in hr ,we should multiply gross photosynthesis with 6 (as we measured gross photosynthesis for 10 min).
Explanation:
In bacteria, a partially diploid strain may result from.
Answers
n bacteria, a partially diploid strain may result from bacterial conjugation or transformation. Bacterial conjugation is a process by which genetic material, usually in the form of a plasmid, is transferred from one bacterium to another.
During conjugation, two bacterial cells come into direct contact, and the donor bacterium transfers a portion of its genetic material to the recipient bacterium. This can include the transfer of a plasmid carrying additional genetic information. As a result, the recipient bacterium becomes partially diploid, containing both its own chromosomal DNA and the transferred DNA. Similarly, bacterial transformation is another mechanism by which bacteria can acquire foreign DNA. In transformation, bacteria take up free-floating DNA from their environment. If the acquired DNA integrates into the bacterial chromosome, it can result in partial diploidy in the recipient bacterium advantages.
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Watson and Crick made a successful model of DNA based on Rosalind Franklin's X-ray studies. This indicated that DNA was
A.
a triple helix with intertwined bases.
B.
a double helix with bases outside the helix.
C.
a double helix with bases inside the helix.
D.
a single linear molecule of bases held together by sugar-phosphate bonds.
Answers
Answer:C. a double helix with bases inside the helix
ExpAnswer: I got it correct
Atom A has six protons , five neutrons and five electrons. Atom B five protons , six neutrons, and five electrons . Are atoms A and B of the same element ?
1. no, because they do not have the same number of protons
2. no, because they do not have the same number of neutrons
3. yes , because they have the same number of electrons
4. yes , because both have 16 protons , neutrons, and electrons combined
Answers
Answer:
no, because they do not have the same number of protons
Explanation:
No of protons represents atomic number which decides the characteristics of an atom . Two atoms having same number of protons but different number of neutrons are same element . They differ only in some physical characteristics . They are called isotopes . In respect of chemical properties they are same . In a neutral element number of protons and number of electrons are same . But in some case number of electrons may differ . In that case they form ions of the element . In positive ion , number of electrons is shorter than number of protons .
In the present case , atom A and atom B differ in respect of number of protons so they represent different element .
tooth decay is caused by bacteria, such as s. mutans, that can attach to the surface of a tooth. how are these bacteria able to attach to the surface and cause infection? what is the role of sugar in this process?
Answers
The main dietary component in the growth of dental decay caries is free sugars. When oral bacteria break down glucose to create acid, which demineralizes the hard structures of the teeth, dental caries is created (enamel and dentine).
As part of its metabolism, the anaerobic bacteria S. mutans is known to create lactic acid. Second, S. mutans can adhere to tooth surfaces when there is sucrose present because it produces glucans, a polymer that helps to attach the bacteria to the tooth. Dental decay is caused by acids produced by bacteria that digest sucrose and other dietary carbohydrates, which dissolve tooth mineral, chiefly hydroxyapatite, Ca10 (P04)6(0H)2. These microorganisms are found in dental decay plaque, a buildup of bacteria on the tooth's surface.
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So my younger sister says that since she hit puberty she can no longer be referred to as a child. I disagreed and called her a child anyways. Do you agree or disagree with my sister? SideNote: We are both minors so I think we are both still children.
Answers
Answer:
I would still refer to her as a child because even tho you may have hit puberty that doesn't mean that ur mentally ready to not be called a child.
Explanation:
A truck spilled oil due to an accident in a lake inhabited by pink flamingos, algae and shrimps. The oil causes the death of shrimps and algae.... what will be the effect of this on the flamingos?
Answers
Answer:
The flamingos will not be able to eat algae and shrimp, thus the food chain will slowly get unbalanced, and then everything will stop
Explanation:
Put the following terms in the order they would occur in the angiosperm life cycle. The first one is done.
Pollination, mature plant with flower, formation of fruit with seed, seed germination, Fertilization of pollen with egg in ovary, seed dispersal.
1 New plant
2
3
4
5
6
7
Answers
Answer: Angiosperms are the plants which produce flowers for sexual reproduction.
Explanation:
In the angiosperm life cycle the following events occur:
1. Seed germination: Under suitable condition inside the soil obtain water, oxygen and minerals the seed germinates and from the two precursors plumule from where the stem emerge and radicle from where the root emerges.
2. Mature plant with flower: The plant gets matured with the develop of root and shoot and from the shoot the bud originates which produces the flower.
3. Pollination: During the process of pollination a mature pollen grain is transferred towards the female reproductive structure typically the stigma receives the pollen grain.
3. Fertilization of pollen with egg in ovary: The pollen is the male gametophyte which develops in the anthers which are the male reproductive structure of the flower and the egg or ovule is the female gamete which develops inside the ovary or female gametophyte. The fusion of male gametes provided by the pollen grain with that of the ovule is called as fertilization.
4. Formation of fruit with seed: After the fertilization process the ovules develop into seed and the ovary into fruit.
5. Seed dispersal: The fruit gets detached from the plant and it may get rotten and dried the dried seeds disperse and may germinate in favorable conditions.
Which of these provides evidence from development biology of a shared evolutionary history ?
Answers
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the leg of the whale and the skeletal structure of it provides the evidence from developmental biology of a shared evolutionary history.
Answer:
D. The skeletal structures of a leg of a horse and a flipper of a whale are very similar.
Explanation: