PBS Evolution: Great Transformations short movie1.If the world’s history were compressed into one hour, how long have humans been here?Microbes. single-celled organisms2.How long ago did mammals first appear on earth? Mammals first appeared about 200 million years ago3.What type of animal did the skull that Dr. Gingrich discovered resemble? Dr. Gingrich discovered resembled a whale4.What did “Whale Valley” used to be?Whale valley is a 5.What unusual feature did they find at the end of the early tetrapods’ limbs? 6.How long ago did animals first appear on Earth? 7.When the mouse “eyeless” gene was implanted into the fruit flies, what happened? 8.How would walking on two legs be an advantage? 9.What modifications does the human skeleton have? Humans has the same transformation as other animals even though humans are special. 10.Your summary/reflection:
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The episode opens up with one probably the evolution contingency's favorite examples of an alleged transformation--from land mammals to the whale. Fossils of Pakicetus, Ambulocetus, Rhodocetus, Dorontid, and Basilosaurus are shown to account for this transition. Pakicetus is represented by a small portion of a skull, a far cry from a solid transitional fossil. Though Ambulocetus is represented in the documentary as a complete fossil of an aquatic mammal with legs, this is an interpretory stretch and embellishment upon the quite fragmented Ambulocetus skeleton which was actually found. Rhodocetus is represented in the series by a mere skull. Though Basilosaurus is a complete whale-like fossil with how important is it really for accounting for the transition. Many have suggested those "legs" aren't vestigial but played some role in copulation. Perhaps they even had a swimming function. So what have we been shown here? 2 skulls, one fragmentary skeleton not necessarily transitional whatsoever, and a full aquatic whale type with small hind legs. From this data we have our number one example of an alleged evolutionary transition.
Related Questions
Carlton and Vanessa are lab partners in their biology class. One of their labs was to run the smell test experiment on each other.
When performing the smell test, Vanessa was quite good at noticing a difference between the various intensities of vanilla and also
the various intensities of evergreen. Although Carlton could distinguish what the vanilla and evergreen smells were, he couldn't tell
there was a difference in the intensities in the vanilla or the evergreen. Based on the information presented in this scenario, which
of the following is true?
Vanessa has a more sensitive difference threshold than Carlton.
Carlton has an impaired absolute threshold.
Vanessa has a better absolute threshold than Carlton.
Carlton has the superior performance with respect to the difference threshold.
Vanessa has an impaired absolute threshold.
Answers
Vanessa has a better absolute threshold and more sensitive difference threshold than Carlton, and Carlton has an impaired absolute threshold.
Carlton and Vanessa were lab partners for a biology class and were asked to run a smell test experiment on each other.
Vanessa was excellent at noticing the difference between various intensities of vanilla and evergreen.
Carlton, on the other hand, couldn't distinguish the difference in the intensities of both vanilla and evergreen, though he could tell the smells of both.
Hence, based on the information provided in the scenario, it can be inferred that Vanessa has a more sensitive difference threshold than Carlton, and Carlton has an impaired absolute threshold.
The two significant aspects that are involved in the scenario are absolute threshold and difference threshold.
The absolute threshold is the smallest quantity of a stimulus that an individual can detect, whereas the difference threshold is the minimum difference in stimuli that an individual can detect.
Carlton could recognize the stimuli's smell but not the difference in the intensity of vanilla and evergreen.
This shows that Carlton has an impaired absolute threshold.
He could not detect the smallest quantity of a stimulus to differentiate between the smells.
Vanessa was quite good at noticing the difference in the intensities of vanilla and evergreen.
This means that Vanessa has a more sensitive difference threshold than Carlton. She could detect the minimum difference in stimuli required to differentiate between smells.
Vanessa also has a better absolute threshold than Carlton as she could detect the smallest quantity of stimulus required to detect the smells.
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From the examples below, select the examples of cells or organisms responding to stimuli in order to maintain homeostasis.
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Example of cells or organisms responding to stimuli in order to maintain homeostasis
A unicellular organism beating microscopic hairs to escape a chemical pollutant in its environmentA plant bending toward a light sourceAnts moving within their mounds depending on the time of dayIguanas laying in the sunlight if their body temperature is lowA person shivering when their body temperature is low.What is homeostasis?Homeostasis is the process by which the body maintains a fairly constant environment at all times.
Homeostasis is important to organisms because the cells of the body can only perform their metabolic functions efficiently within certain physiological conditions.
Example of cells or organisms responding to stimuli in order to maintain homeostasis include the following:
A unicellular organism beating microscopic hairs to escape a chemical pollutant in its environment so that the internalenvironment is not adversely affected by the pollution in the external environment A plant bending toward a light source in order to receive more light required for growth and production of food. Ants moving within their mounds depending on the time of day in order maintain their body temperatures within the optimum range requiredfor continuous body functions.Iguanas laying in the sunlight if their body temperature is low in order maintain their body temperatures within the optimum range requiredfor continuous body functionsA person shivering when their body temperature is low in order maintain their body temperatures within the optimum range requiredfor continuous body functions.In conclusion, homeostasis helps organisms respond and adapt to changes in their environment.
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why do geologist think earths core contains mostly iorn
Answers
I hope my answer helped you! If you need more information or help, comment down below and I will be sure to respond if I am online. Have a wonderful rest of your day!
Did Atom is the smallest level of organization
Answers
Answer: yes atom is the smallest level of organization
Explanation:
What are the fnctions of ovule and sepal.
If u write good answer i will keep u in mark as brainlist.
Answers
Answer:
Ovule is the organ responsible for the formation and containment of reproductive cells and it consist of majorly three parts which are integuments (the outer part), the nucellus and the gametophyte
Sepal acts majorly as a defender providing protection to the reproductive cells also acting as a petal in plants without petals.
What are the three types of interactions between organisms in an ecosystem? a. competition, mutualism, and predation b. territoriality, predation, and symbiosis c. competition, predation, and symbiosis d. commensalism, parasitism, and mutualism
Answers
Answer:
The answer is C. sorry for late answer
Explanation:
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Answer:
C.)
Explanation:
september would the earth be experiencing a solstice or an equinox
how do you know
Answers
In September the earth will be experiencing an equinox
Equinoxes occur between March and September. When the Sun's rays strike the equator at midday and at a 90° angle, it is considered an equinox. It stands for the idea that day and night have equivalent lengths. The sunset and dawn are separated by 12 hours everywhere on Earth. One may observe how quickly the sunset and dawn hours shift throughout the day the farther one goes from the equator.
Whereas, solstices occur in June and December. The contrary is visible close to the solstices. For a few days, both the sunset and sunrise appear to be constant. Over the course of the year, the time of day when the sun is directly overhead where one lives also gradually changes.
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inquiry based pedagogy is being embraced in principle across the globe. in the last decade , it has been supported by an increasing body of research on its effectiveness. illustrate your understanding of the concept of inquiry based pedagogy with a relevant example
Answers
Inquiry-based pedagogy involves fostering curiosity and active learning. For example, students investigating real-world environmental issues and proposing solutions.
Inquiry-based pedagogy is a teaching approach that promotes active learning and critical thinking through inquiry and exploration. One relevant example of inquiry-based pedagogy is a science classroom where students are encouraged to design and conduct their own experiments. Instead of simply following instructions, students formulate research questions, develop hypotheses, plan and execute experiments, collect and analyze data, and draw conclusions. For instance, students may investigate the effect of different variables on plant growth by manipulating factors like light, water, or soil composition. This approach allows students to engage in authentic scientific practices, develop problem-solving skills, and gain a deeper understanding of the scientific method. By actively participating in their learning process, students develop a sense of ownership and become more engaged, fostering a love for learning and nurturing their ability to explore and discover knowledge independently.For more such questions on Pedagogy:
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"How are the peppered moths of 19th century England, during the Industrial Revolution, proof of evolution?"
Answers
Answer the question above
Answers
Answer:
F
Explanation:
Most digestion and absorption of food occurs in the
Answers
The given statement, "Most digestion and absorption of food occurs in the" is incomplete and doesn't provide any clue about the required answer. Therefore, it is essential to know the full statement to provide a valid answer to this question.
The process of breaking down food into smaller components (nutrients) in our digestive system so that the body can absorb them for energy production and other metabolic processes is called digestion. The digestive process can be divided into two types: mechanical digestion and chemical digestion.
Mechanical digestion involves the physical breakdown of food into smaller particles through chewing and grinding. On the other hand, chemical digestion refers to the breakdown of food into smaller nutrients with the help of digestive enzymes and other secretions from the gastrointestinal tract.
After the breakdown of food, the process of absorption takes place. Absorption is the process in which the nutrients, minerals, and other components of food are absorbed by the small intestine and transported to other parts of the body. The small intestine is a critical part of the digestive system responsible for nutrient absorption, while the large intestine absorbs water and minerals.
Nutrients from food are absorbed by the small intestine into the bloodstream and then transported to cells throughout the body for energy production, tissue repair, and other metabolic processes.
In conclusion, the process of digestion and absorption of food is crucial for the proper functioning of the body. The majority of digestion and absorption of food occurs in the small intestine.
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IUPAC name of 2,2,3-trimethyl butane
Answers
Answer:
Triptane molecular formula C7H16what is the meaning of involuntary action
Answers
Involuntary actions is when something happens unintentionally or without a person's conscious control, it is said to be occurring involuntarily
What is Involuntary actions?When something happens unintentionally or without a person's conscious control, it is said to be occurring involuntarily. Usually, the autonomic nervous system or reflexive reactions control these actions.
In contrast to voluntary acts, which may be controlled consciously, involuntary actions occur without conscious thought or intentional decision-making.
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Which has the highest potential energy - glucose or glycogen?
Answers
Glucose is referred to as the compound which has the highest potential energy.
What is Potential energy?This is referred to as the type of energy which is possessed by a body by virtue of its position and is depicted by the state of rest of a body or compound.
Glucose and glycogen are compounds which helps supply energy to the cells of the body so as to enable them perform their daily activities. Glucose however has the highest potential energy because it has more bonds and also means there is more energy available to perform different types of reactions.
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The sex chromosome of plants were first discovered in?
Answers
Answer: The chromosome was discovered for the first time in Melandrium.
Explanation:
These plants have XX-XY mechanism of sex determination, wherever the male plant is heterogametic and carries “XY” chromosome, while feminine plant carries 2 copies of X-chromosomes (XX) as sex chromosomes.
What evidence was used to create the geologic time scale?
Answers
Answer:i think the answer is changes in the fossils going from oldest to youngest sedimentary rocks.
Explanation:
How do I give a specific coherent answer for those two questions?
Answers
Individuals or population have specific interaction in between them that may affect the species distribution and abundance. Species lives and survive together in a so called inter-specific competition. If the intraspecific competition is stronger between individuals from the same species, species can survive the interspecific competition in between species. Competition from the same species can be active or passive.
Interspecific competition is the survival of different species in a certain habitat. While sharing the same habitat, these different species undergo interaction with each other that affect their population growth and abundance. This is called as ecological community. Specific interaction in between species are competition, predation, herbivory, symbiosis, mutualism, and commensalism. These type of interspecific interactions can be affected by different factors such as reproduction, natural resources, space and nesting sites, competition, and waste and diseases. While competing for survival, these species will have access to common resource that is limited in supply. The outcome of such competition is usually negative. It is always affecting the weaker competitors.
explain how a kidney machine works if you have a kidney failure
Answers
Answer:
Explanation:
A kidney machine, also known as a hemodialysis machine, filters your blood through a dialyzer, which works like a kidney and filters out extra salt, waste, and fluid. The machine has built-in safety checks to ensure the process is safe and effective. A pump in the machine slowly draws out your blood, then sends it through the dialyzer. Your cleaned blood is sent back into your body through the second needle in your arm.
Hope this helps :) !!!
In peas, round shape is dominant (R) over wrinkled (r) and yellow color is dominant (Y) over green (y). If both parent plants are heterozygous for both traits,
what is the probability of an offspring's phenotype being round and yellow?
HELP I NEED A NUMBER OUT OF 16
Answers
Answer:
9/16
Explanation:
RrYy x 2
Answer:
9 out of 16 (also 9/16)
Explanation:
Count the likeliness of the offspring to be round:
RR, Rr, rR, rr
round shape is 3 out of 4 times
Count the likeliness of the offspring to be yellow:
YY, Yy, yY, yy
yellow color is 3 out of 4 times
Multiply the likeliness of being round and being yellow (since they are two independent probabilities, we are using multiplication rule):
3/4 * 3/4 = 9/16
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The function of an intromittent organ is to:
transfer sperm to the female.
aid in external fertilization.
transfer pollen grains to the stigma.
Answers
Answer:
Explanation:
An intromittent organ is any external organ of a male organism that is specialized to deliver sperm during copulation. Intromittent organs are found most often in terrestrial species, as most non-mammalian aquatic species fertilize their eggs externally, although there are exceptions. For many species in the animal kingdom, the male intromittent organ is a hallmark characteristic of internal fertilization.
Which of the following organelles can change shape, can move quickly around the cell, and is found in both plant and animal cells? Cell wall Central vacuole Chloroplast Mitochondrion
Answers
Answer:
Mitochondrion
Explanation:
Both plant and animal cells contain Mitochondrions and they move within the cell. Hope this helps :)
Some parts of the worlds rainforests haven’t been studied closely, and may contain species of plants which have benefits for humans. ‘Suggest and explain uses of stem cells taken from the meristem of a new species of plant.’
Answers
To determine the similarity of stem cells of one species of plant with that of another: By determining the similarity between the stem cells taken from two different species, it can be identified whether there is a possibility of clowning, of giving birth to new and improved species of plants that are beneficial for mankind, or that of interchanging the stem cells to boost up or slow down the growth of the plants. To determine whether the stem cells can be altered and reintroduced to make the plants grow in a specified manner: By altering and modifying the stem cells and reintroducing them back again, it is possible to restrict the growth of the plant to a specific size or shape. This trait of the stem cells can be used to make the plantation possible in compact areas as well as to grow the plants in the desired shapes.
To determine whether the speed of division of cells at the roots and appendages of the plant can be modified: By restricting or boosting the speed of the division of meristem cells using modified stem cells, the plant can be made to grow faster in a specific season and slower in another. This feature can be used to lower the vulnerability of the plant species towards various natural weathering actions.
Stem cells extracted from the meristem can be precisely examined for their effectiveness against illnesses that harm portions of the plants such as the roots, shoots, and appendages to ascertain the resistance against various plant diseases.
What is meristem?They can thus also be utilized to rebuild the damaged plant tissues if the newly discovered species becomes extinct.
It can be determined whether there is a chance of clowning, or of giving birth to new and improved species of plants that are beneficial to mankind.
Therefore, Stem cells extracted from the meristem can be precisely examined for their effectiveness against illnesses that harm portions of the plants such as the roots, shoots, and appendages to ascertain the resistance against various plant diseases.
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Bacteria are classified in which of the following domains? EukaryoteProkaryoteFungalPlantae
Answers
Bacteria are classified to be under the domain Prokaryote. It is because these organisms are unicellular and lack a membrane-bound nucleus and organelles.
Proteins do all of the following things in the body, except which of the following?
a. digest food
b. carry genetic information
C. carry oxygen in the blood
d. speed up chemical reactions
Answers
Answer:
b. carry genetic information
Explanation:
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Proteins do all of the following things in the body, except the following - b. carry genetic information
ProteinsProteins 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.they form tissues and organshelps in digesting the foodthey are as enzymes and hormones also help in the regulation of various chemical reactions of the body.Thus, Proteins do all of the following things in the body, except the following - b. carry genetic information
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What type of succession is shown in the picture?
Answers
Answer:
secondary succession
Explanation:
intermediate species
Answer:
Primary succession
Explanation:
Primary succession is one of two types of biological and ecological succession of plant life, occurring in an environment in which new substrate devoid of vegetation and other organisms usually lacking soil, such as a lava flow or area left from retreated glacier, is deposited. In other words, it is the gradual growth of an ecosystem over a longer period of time.
What are the flattened membranes in chloroplasts called?
Answers
Answer:
Thylakoid membrane
Explanation:
There are three "layers" of a chloroplast. The inner layer, the outer layer and the Thylakoid membrane is the third and internal membrane system.
I hope this helped!
In dragons, blue horns
(B) are dominant to
yellow horns (b).
What percent of these
offspring would have
yellow horns?
50%
75%
0%
25%
Answers
The answer is 25 percent
Question 27 of 30
Which statement provides the best description of the relationship between
primary consumers and producers?
OA. Primary consumers provide producers with the chemical energy
they need.
OB. Primary consumers eat secondary consumers, which rely on
producers for food.
OC. Producers provide primary consumers with the chemical energy
they need.
OD. Producers and primary consumers compete with each other for
food sources.
Answers
The correct choice is:
OC. Producers provide primary consumers with the chemical energy
they need.
Primary consumers (e.g. herbivores) eat producers (e.g. plants) and gain their chemical
energy from the producers. The other choices do not accurately describe this producer-primary
consumer relationship.
OA. Primary consumers do not provide producers with chemical energy.
Producers provide chemical energy to primary consumers through photosynthesis.
OB. Primary consumers do not eat secondary consumers. Secondary
consumers eat primary consumers.
OD. Producers and primary consumers do not compete for the same
food sources. They occupy different trophic levels in the food chain.
Producers are the base of the food chain and primary consumers feed on them.
So the key relationship is that producers provide primary consumers
with chemical energy by being the base of the food chain and serving
as the primary food source for herbivores.
(i think it’s antigens)…how do people require immunity? A. through inflammationB. through breast-feedingC. through a shot D. through antigens
Answers
Immunity to a disease is achieved through the presence of antibodies to that disease.
Write down two ways in which the tadpoles depend on the water plants for survival
Answers
Answer: Tadpoles depend on water plants for oxygen. Water plants produce oxygen through photosynthesis and release it into the water, providing a crucial source of oxygen for the tadpoles to breathe.
Tadpoles also depend on water plants for food. Many species of tadpoles are herbivorous, meaning they feed on plant matter such as algae and aquatic plants. Water plants provide a source of nutrition for the tadpoles to sustain themselves and grow into adult frogs.
Explanation: