Reflection Questions
1. Explain how biological evolution is supported by the fossil record.
2. Why is natural selection a mechanism for biological change?
3. How does chemical evolution explain the origin of life on Earth?
4. Explain why scientific theories, such as biological and chemical evolution, represent the
strongest explanation of the changes observed in the fossil record.
5. How can scientific theories on evolution and the fossil record change over time?
Answer:
1) The word ‘evolution’ was first mentioned in the book ‘The Origin of Species’ in 1859, by Charles Darwin. Darwin put forward the concept of evolution during his journey to the Galapagos Islands.
2)Natural selection is an important mechanism of evolution. It states that the organisms that are able to survive and reproduce with the changing environmental conditions are selected by nature while the ones that cannot survive are eliminated.
3) Evolution mainly deals with the origin of life on earth. The conditions and the forms of life on earth were entirely different from what we see today.
please forgive me I cant answer 4th one..
5)Charles Darwin, an English naturalist of the 19th century made an extensive study of nature for over 20 years.
1. The fossil record provides crucial evidence for biological evolution. Fossils are the preserved remains or traces of past organisms, providing a record of life on Earth over millions of years.
By studying fossils, scientists can observe changes in organisms and their characteristics over time. Fossils show a progression of simpler life forms in older layers to more complex ones in more recent layers.
2. Natural selection is a mechanism for biological change because it leads to the adaptation of populations to their environments over time. It is based on the concept that individuals within a population exhibit variation in traits, and those traits that enhance survival and reproduction are more likely to be passed on to future generations.
Through natural selection, individuals with advantageous traits have higher chances of surviving and reproducing, leading to the increased frequency of those traits in subsequent generations.
3. Chemical evolution, also known as abiogenesis or prebiotic evolution, explains the origin of life on Earth by proposing that life arose from non-living matter through a series of chemical reactions.
According to this theory, in Earth's early conditions, simple organic molecules formed from inorganic compounds through processes like lightning, volcanic activity, and reactions in the atmosphere and oceans.
These molecules then underwent further reactions, leading to the formation of more complex molecules like amino acids and nucleotides, which are the building blocks of proteins and nucleic acids, respectively.
4. Scientific theories such as biological and chemical evolution represent the strongest explanations for the changes observed in the fossil record because they are supported by extensive evidence from multiple scientific disciplines.
These theories have withstood rigorous testing, scrutiny, and peer review over many years. They are based on a large body of evidence, including the fossil record, comparative anatomy, genetics, molecular biology, and observations of natural populations.
5. Scientific theories on evolution and the fossil record can change over time as new evidence is discovered, technologies advance, and scientific understanding improves.
The process of scientific inquiry involves continuous investigation, testing, and refinement of theories based on new data and observations.
As scientists gather more evidence from fossil discoveries, genetic studies, experimental research, and other fields, our understanding of evolution and the fossil record can deepen and evolve.
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i need info about hurricane maria (threes sentences)
HYEOO PEEPS what happens when u push a triangular box back and forth on a ramp
Answer:
hi-hi,
i believe the answer is that you'll create friction and thermal heat
Explanation:
https://www.khanacademy.org/science/physics/work-and-energy/work-and-energy-tutorial/v/work-energy-problem-with-friction
this is the video i watched to help answer your question
good luck :)
i hope this helps
**please let me know if this was not what you were looking for/incorrect or both**
have a nice day!
TRUE/FALSE: One way to tell the difference between a plant and animal cell is that the animal cell is rectangular in shape.
Answer:
false
Explanation:
animal cells are circular
PLS HELP
Flocabulary
Answer:
im pretty sure its B
Explanation:
On the average, how much energy is lost from each trophic level? explain why
Answer:
I think it's 10% because some of it turns into heat energy
Explanation:
On average, about 90% of the energy is lost from each tropic level. The remaining 10% is available for the next trophic level.
The tropic level of the organisms is the position of organisms occupied in the food web. When an organism consumes other organisms as its food, the energy stored in the form of chemical energy in the organic molecules is converted into the energy used for cellular respiration.
This conversion is not efficient and the energy is lost in the form of heat. Some of the energy is used for growth and maintenance. While other energy is excreted.
Thus, when an organism consumed organic matter, 90% of the energy is lost and 10% of the energy is involved in the building of body tissues. This 10% of energy is passed to the next level.
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Please, help me!!
Question is down below..
Answer:
CO(Carbon dioxide) is a compound because it is made up of atoms of carbon bonded to atoms of oxygen. Diatomic molecules are classified as elements because it consists of two atoms(the same kind) bonded together.
Can you defang a octopus?
How can the energy stored in the photosynthetic organism be used?
☁️ Answer ☁️
1: "Through photosynthesis, certain organisms convert solar energy (sunlight) into chemical energy, which is then used to build carbohydrate molecules."
2: "The energy stored in the bonds to hold these molecules together is released when an organism breaks down food. Cells then use this energy to perform work, such as movement. "
-GoogIe
(And I love your pfp)
Hope it helps.
Have a nice day noona/hyung.
How will a humans and a rabbits habitat overlap or intersect?
Answer:Rabbits impact our national parks and reserves by: reducing the regeneration of native plants, through grazing and ringbarking of saplings. competing with native animals for food and shelter. damaging historic and cultural sites, through soil erosion caused by over grazing.Jul 27, 2018
Explanation:
Melanie took two identical thermometers, one with its bulb painted black and the other with its bulb painted white. She kept a lighted lamp at equal distance from the two thermometers.
Which thermometer will show a higher temperature after an hour?
Thermometer with black bulb, because black reflects less heat than white
Thermometer with black bulb, because black absorbs less heat than white
Thermometer with white bulb, because black reflects more heat than white
Thermometer with white bulb, because black absorbs more heat than white
Answer:
A
Explanation:
Answer:
A
Explanation:
The table compares continental and oceanic landforms on Earth. What term should be used to replace the question mark in the table? A) cavern B) trench C) plateau D) mountain
Answer:
D
Explanation:
Because these are in oceans and on land.
You are tasked with identifying several rock samples. You are stumped by this sample. Your teacher has given you a hint. She tells you that it contains iron. You can now narrow your choices. But, you want to know if the rock contains hematite or magnetite.
Design a strategy to test what mineral is present.
A) Test to determine the hardness of the two samples; observe the colors.
B) Observe the shape of the crystals; observe the streak color from a streak test.
C) Observe the colors; do a streak test; see which sample is attracted to a magnet.
D) Observe the shape; determine the hardness of the two samples; observe the colors.
Answer:
I am prety sure C
Explanation:
Also how do you start a message with your friends?
Tell me something interesting about protozoa (at least 5 facts)
make it simple
Answer:
an expression of more than two algebraic terms, especially the sum of several terms that contain different powers of the same variable(s).
Hello there!!
I love protozoa so this should be fun.
1. Protozoans are unicellular beings that live in wet environments.
2. Protozoans have 2 prevalent ways of feeding:
a) the most common is utilized by heterotrophs like amoeba. An amoeba extends its elastic body until it completely surrounds the victim. Then the amoeba simply has to digest its food.
b) The second most common is through cilia. Paramecia use this method. The hair-like cilia in its mouth catch hold of food and push the meal into the paramecium's digestive tract.
3) The only protozoan to have its own family is Euglena.
4) Euglena has its own family because it has chloroplasts (meaning it can undergo photosynthesis) but it can also feed like a heterotroph. Because Euglena exhibits both plant and protozoan qualities, it has its own category.
5) Rotifers move by two spinning wheels of cilia. This type of propulsion makes the rotifer a speedy little protozoan.
I hope this answers your question. :)
A protein may fold incorrectly if_________ brings the wrong amino acid to the ribosome to assemble the protein.
If tRNA does not bring back the appropriate amino acids, the protein may fold incorrectly. so, the blank is tRNA.
What is tRNA?The type of RNA that helps in the synthesis of proteins from mRNA, called as tRNA. tRNA acts as an adapter molecule during the translation process, and as an adapter, it connects amino acids to nucleic acids. It carries the amino acids that are added to the peptide chain and decodes the same codons in the mRNA molecule.
The structure of tRNA can be separated into primary, secondary and tertiary structures. The structure tRNA has four arms (the acceptor, D, anti-codon and -arms), three loops (D, anti-codon and -loop) and a variable region.
It binds amino acids to specific codons present in the mRNA, by acting as an adapter. Therefore, If tRNA bring wrong amino acid to ribosome for assembly of protein, protein may fold incorrectly.
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Yeast are unicellular organisms that produce offspring from a bulge that forms and breaks away from the parent. Based on this information, what type of reproduction is this?
A. Sexual Reproduction
B. Asexual Reproduction (budding)
C. Asexual Reproduction (binary fission)
Answer: B. asexual reproduction (budding)
Explanation:
it might help you
Which of the following is the smallest level of organization in living things?
A. organ system
B. cell
C. tissue
D. organ
Answer:
B. Cell
Explanation:
Order from smallest to most complex:
Cell - Tissue - Organ - Organ system.
Cells are the smallest. Multiple cells working together forms a tissue. Multiple tissues working together forms and organ. Multiple organs form an organ system.
Cell
Cells make tissue, tissues makes organs, organs make a system.
The image below shows how wolves and dogs compare to some other animals in the levels of classification. (5 points)
An image of classification levels of dog is shown. There are 8 columns and 7 rows. The top row says Animalia and then lists the following organisms from left to right: Insect, Fish, Rabbit, Cat, Fox, Jackal, Wolf, and Dog. The second row says Chordata and lists the following organisms from left to right: Fish, Rabbit, Cat, Fox, Jackal, Wolf, and Dog. The third row says Mammalia and lists the following organisms from left to right: Rabbit, Cat, Fox, Jackal, Wolf, and Dog. The fourth row says Carnivora and lists the following organisms from left to right: Cat, Fox, Jackal, Wolf, and Dog. The fifth row says Canidae and lists the following organisms from left to right: Fox, Jackal, Wolf, and Dog. The sixth row says Canis and lists the following organisms from left to right: Jackal, Wolf and Dog. The seventh row says Canis lupus and lists the following organisms from left to right: Wolf and Dog.
Based on the chart, how are fish and dogs related?
They belong to the same kingdom but different phyla.
They belong to the same phylum but different classes.
They belong to the same kingdom and class.
They belong to the same phylum and class.
Answer:
I would say it is 'They belong to the same phylum but different classes.'
Explanation:
hope this helps :)
Which choice best explains why scientists may use volunteers to help with an investigation?
A. Scientists have a large amount of data to collect.
B. Scientists must spend a lot of time creating graphs to analyze the data.
C. Scientists want to help volunteers learn more about the scientific process.
Answer:
c
Explanation:
well volunteers are use to help and learn so i think c is the correct answer
Sammie is using radiocarbon dating to determine the age of a sample of objects. Which best explains why radiocarbon dating can be used to determine the accurate age of these items?
A. They contain radioactive isotopes that decay at a constant rate.
B. They are made primarily of radioactive carbon that is easy to detect.
C. They give off radioactive isotopes when an electrical charge is applied.
D. They have been exposed to large amounts of radioactivity in the atmosphere.
Answer: I think the correct answer is A or B.
Explanation: But i highly suggest B
Radiocarbon dating is a feasibe method because the isotopes involved decay at a constant rate.
What is radiocarbon dating?The term radiocarbon dating refers to the use of carbon in the establishment of the age of a sample. This is usually done by the use of carbon -14 isotope.
The reason why radiocarbon dating can be used to determine the accurate age of these items is that they contain radioactive isotopes that decay at a constant rate.
Learn more about isotopes: https://brainly.com/question/365923
can u plz explain the role of the digestive, endocrine, and excretory systems in maintaining homeostasis.
Answer:
Following are the roles of the digestive, excretory and endocrine systems in terms of homeostasis:
The endocrine system regulates the secretion of various hormones and homeostatic mechanisms in response to signals of the hypothalamus and pituitary glands.The excretory system maintains homeostasis by purifying the blood and getting rid of toxic waste from the blood.The digestive system is mainly involved in the transfer and regulation of nutrients from food.Explanation:
Role of Endocrine System:
The endocrine system mediates all the chemical signaling in the body.
Hormones are chemical messengers that the endocrine system uses to maintain chemical homeostasis.
Endocrine system manages glucoregulation by controlling the secretion of the hormones glucagon and insulin by the pancreas. Low and high blood sugar levels are sensed by the brain which then signals the endocrine system to release glucagon and insulin respectively.
The endocrine system is also indirectly involved in thermoregulation. A low core temperature signal received by the hypothalamus initiates the release of TSH by the pituitary gland and then that of T3, T4 thyroid hormones that stimulate shivering thermogenesis in the skeletal muscles.
Role of Digestive System:
The digestive system regulates the amount of nutrients absorbed in the body.
Although the absorption of nutrients in food is not exactly according to bodily needs, the absorption of dietary iron and calcium is strictly regulated by the digestive system.
Role of Excretory System:
The excretory system carries out osmoregulation which is the maintenance and regulation of water and salt levels in the blood.
The excretory system regulates the excretion of toxic waste from the blood.
Excess water, salts, urea and bilirubin (produced as a result of RBC break down) are some of the excretions.
please mark me as brainliest
Answer:
Following are the roles of the digestive, excretory and endocrine systems in terms of homeostasis:
The endocrine system regulates the secretion of various hormones and homeostatic mechanisms in response to signals of the hypothalamus and pituitary glands.
The excretory system maintains homeostasis by purifying the blood and getting rid of toxic waste from the blood.
The digestive system is mainly involved in the transfer and regulation of nutrients from food.
Explanation:
Role of Endocrine System:
The endocrine system mediates all the chemical signaling in the body.
Hormones are chemical messengers that the endocrine system uses to maintain chemical homeostasis.
Endocrine system manages glucoregulation by controlling the secretion of the hormones glucagon and insulin by the pancreas. Low and high blood sugar levels are sensed by the brain which then signals the endocrine system to release glucagon and insulin respectively.
The endocrine system is also indirectly involved in thermoregulation. A low core temperature signal received by the hypothalamus initiates the release of TSH by the pituitary gland and then that of T3, T4 thyroid hormones that stimulate shivering thermogenesis in the skeletal muscles.
Role of Digestive System:
The digestive system regulates the amount of nutrients absorbed in the body.
Although the absorption of nutrients in food is not exactly according to bodily needs, the absorption of dietary iron and calcium is strictly regulated by the digestive system.
Role of Excretory System:
The excretory system carries out osmoregulation which is the maintenance and regulation of water and salt levels in the blood.
The excretory system regulates the excretion of toxic waste from the blood.
Excess water, salts, urea and bilirubin (produced as a result of RBC break down) are some of the excretions.
Can octopuses grow their fangs back?
Answer:
hi
Explanation:
i think they can't.But they can regrow their arms
have a nice day
Which statement best describes how panting after running helps a person's body maintain homeostasis? EXPLAIN THE ANSWER
A). It keeps the person's body warm when it is cold outside.
B). It rids the body of harmful organisms in the respiratory tract.
C). It brings more oxygen into the body to help meet increased energy needs.
D). It signals the body to start exercising to prevent getting out of shape.
How do weather impact travel and tourism? (We are going to explore how weather impacts travel to Costa Rica, and how weather influences whale migration/whale watching tourism.)
Scientists group similar organisms together through a process called …..
Answer:
your answer would be taxonomy
Explanation:
This probably isn't much, but I LOVE science,
(please pick as Brainliest)
There are several microorganisms all around us, they all come in different shapes and sizes. It might be quite difficult to identify one organism from the other. To solve this problem scientists came up with a method of naming and grouping microorganisms into different categories, this method is known as TAXONOMY.
Taxonomy is the method of classifying different organisms into various groups. The scientist that first came up with this method is known as Carl Linnaeus. The different categories include; kingdom, phylum, class, order, family, genus, species.
Hence scientists group similar organisms together through a process called TAXONOMY.
During facilitated diffusion, molecules pass through the cell membrane with the help of?
- proteins,
- lipids,
- water
Answer:
proteins
Explanation:
In the levels of organization, a group of organs form _________.
- an organ system,
- tissues,
- bones
Answer:
an organ system
Explanation:
1. What is the value of the AMPLITUDE for WAVE A?
2. What is the value of the WAVELENGTH for WAVE A?
Answer:
Sorry I really just needed the points ;(
Explanation:
Answer:
1) Amplitude of wave A: 0.5 meters
2) You would have to find the wavelength with the equation λ = [tex]\frac{v}{f}[/tex]
Explanation:
1) Amplitude of a wave is the height of the wave from the horizontal line drawn on "0" to the highest point on the wave.
2) λ is lambda, sign for the wavelength. V is the velocity of the wave, and F is the frequency of the wave.
Hope this helps!
Plsss help me with this its science
Make a general comparison of those planets closer to the sun with those farther from the sun,
based on the data below.
Answer:
Planets that are farther tend to have gas surfaces, a bigger diameter, and more moons. Planets closer to the sun have the opposite.
what is the howler monkeys biome