Answer:
Characteristics of Chordata. Animals in the phylum Chordata share four key features that appear at some stage during their development: a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post- tail (Figure 2). In some groups, some of these are present only during embryonic development.
List three ways in which mitosis and meiosis differ, and list two ways in which they're similar.
Mitosis;
- Divided from a somatic cell
- 2 daughter cells
- All daughter cells have 46 Chromosomes
Meiosis;
- Divided from a reproductive cell
- 4 daughter cells
- All daughter cells have 23 chromosomes
Some ways they're similar;
- Produce new cells
- Similar basic steps
- Start with a single parent cell
Mitosis and meiosis differ in the number of divisions, chromosome numbers, and genetic variation, while they are similar in terms of cellular processes and stages.
Explanation:Mitosis and meiosis differ in three main ways:
Number of divisions: Mitosis is a single division process that results in two identical daughter cells, while meiosis involves two divisions and produces four genetically different daughter cells.Chromosome number: Mitosis maintains the same number of chromosomes as the parent cell, whereas meiosis reduces the number of chromosomes by half, resulting in haploid daughter cells.Genetic variation: Mitosis produces genetically identical daughter cells, whereas meiosis generates genetic variation through recombination and crossing over.Similarities between mitosis and meiosis:
Cellular processes: Both mitosis and meiosis involve the division of cells.Stages: Both processes have similar stages, including prophase, metaphase, anaphase, and telophase.Learn more about Mitosis and Meiosis here:https://brainly.com/question/32989055
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Lakes and ponds which have limestone or calcium carbonate are affected less by acid rain than those which have granite. This is because ?
Answer:
Limestone and Acid Rain. Carbon Dioxide-Bicarbonate-Carbonate Equilibrium ... The buffered water resists changes to pH from additional acid or base. ... Because surface waters are in equilibrium with atmospheric carbon dioxide there is ... The presence of limestone and other calcium carbonate rock in lakes and streams ...
Explanation:
Answer:
calcium carbonate solutions are basic and neutralize the acid rain.
Explanation:
Earth’s outer core will not transmit S waves because it is made of _____.
liquids
nonmagnetic material
granodiorite
solids
Answer: Liquids
Explanation: S-waves are not transmitted through the liquid outer core. This produces a 'shadow zone' on certain parts of the Earth's surface where S-waves are not recorded.
Answer:
liquids
Explanation:
Seismic wave (also called S waves) is simply the name given to waves that travel internally across the planet or on its surface as a result of major events, such as earthquakes.
They can be classified into two groups, depending on the medium in which they are propagated. The volume waves that propagate inside the Earth and the surface waves, which as the name suggests, propagate on the surface. Each classification groups waves that have different shapes, speeds and natures.
The Earth's outer core does not transmit S waves because it is formed by iron and the material is in a liquid state.
S waves have a shear movement, which means that the soil is displaced perpendicular to the direction of propagation, and propagate only in solids, since fluids have no shear resistance. The animations below show how these waves are propagated.
What starts the light reaction of photosynthesis?
Answer:
light strikes the chloroplast.
Explanation:
The first stage of photosynthesis is the light dependent reactions. These reactions take place on the thylakoid membrane inside the chloroplast. During this stage light energy is converted to ATP (chemical energy) and NADPH (reducing power).
At the end of each bronchiole is an (1) air sac (2) pleura (3) bronchus (4) larynx
At the end of each bronchiole is an air sac (a) made from small clumps of alveoli.
Hope this helps.
- Danielle xo
Answer:
1) air sac
Explanation:
The smallest branches are called bronchioles and at the end of these are your air sacs.
Which global wind belt do we live in?
Okay, first of all, I don't know what "do we live in" means. I am guessing you're talking about the United States.
We live in the Prevailing Westerlies, which blow in the middle latitudes. Most of North America fits into this belt.
Which of the following characteristics describe the outer planets?
A: high density, large gas giants, made of metal and rock, have no moons
B: small gas planets, high density, made of rock and metal, many moons
C: large gas giants, made of helium and hydrogen, many moons,
D: low density, smaller than inner planets, made of helium and hydrogen, no moons
The answer is C, hope this helps
Create an explanation for the anatomical similarities and differences of modern versus fossil organisms to show evolutionary relationships. PLEASE SOLVE, WOULD MEAN A LOT THANK YOU! :)
The anomitic is for the difference
Analyzing anatomical features in both fossils and modern organisms reveals evolutionary relationships through similarities that point to a common ancestor. Comparative anatomy, along with embryological and molecular data, provides evidence for these links, highlighting the fundamental blueprint shared by diverse species that have diverged over time.
Understanding the evolutionary relationships between modern and fossil organisms involves examining their anatomical features. The presence of similar structures in different species, a concept known as homology, is a powerful indicator of common ancestry. When we compare the anatomy of fossils with contemporary species, we often discover that while each species has adapted to different environments and lifestyles, there's a fundamental blueprint that links them together.
For example, the whale flipper, bird wing, and human arm all share a common structural pattern—a long bone (humerus), followed by two bones (radius and ulna), then smaller bones (carpals), and finally the digits. Such similarities arise not from a functional need to be similar but from a shared lineage that diverged through evolutionary processes. These homologous structures may have different functions but their underlying similarity points to a common ancestor.
On the other hand, when observing fossil records, we notice changes that illustrate how species have diverged from this common blueprint due to natural selection and adaptation to their environments. The skeletal structures, while retaining some level of similarity, may display significant differences in form and function. This evolutionary adaptation is evident when we analyze sequential changes in fossil records, such as the transition from dinosaurs to birds or the development of horses from small, multi-toed ancestors.
Through comparative anatomy, we observe that the number, size, and shape of bones may vary between creatures, reflecting the evolutionary pressures unique to their way of life. However, the presence of certain bones—the vertebral column in vertebrates—is a persistent and undeniable link among species, highlighting their common origin. Another example is the anatomical similarities observed in the skeletons of distantly related species such as the dugong and the European mole, implying deep evolutionary connections.
In addition to anatomical and fossil evidence, embryology and molecular data like DNA similarities also reinforce evolutionary connections. Embryological development can show homologous structures that may not be evident in adult organisms, while DNA sequence comparisons can quantify the genetic links between species. In conclusion, the continued study of fossils, anatomy, embryology, and molecular biology provides a robust framework for understanding the evolutionary relationships that unite the diversity of life on Earth.
Describe an environmental factor that could influence natural selection and decrease genetic diversity and pick a specific example to illustrate your point
Answer:
Environmental factors model organisms' phenotypes. Natural selection benefits certain traits over others to increase organisms' fitness and adaptation. Oceanographic barriers and streams model the dolphins' skulls.
Explanation:
A change in the environment can influence natural selection and decrease genetic diversity. An example of this is the evolution of the peppered moth in England during the Industrial Revolution.
Explanation:One environmental factor that could influence natural selection and decrease genetic diversity is a change in the environment. When the environment changes, populations can undergo directional selection, which selects for phenotypes at one end of the spectrum of existing variation. An example of this is the evolution of the peppered moth in eighteenth- and nineteenth-century England. Prior to the Industrial Revolution, the light-colored moths blended in with the light-colored trees and lichens in their environment. However, as soot from factories darkened the trees, the darker melanic form of the moth had a higher survival rate in habitats affected by air pollution.
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what happens when too much water enters an animal cell via osmosis
Answer: The cell explodes
Explanation:
The cell has to maintain equilibrum. For that to happen, it must have been overriden. The cell will end up dying.
Arrange the unstable isotopes in decreasing order based on the length of their half-life. carbon-14 (5.73 × 103 years) argon-39 (2.69 × 102 years) hafnium-182 (9 × 106 years) krypton-81 (2.29 × 105 years) calcium-41 (1.03 × 105 years) iron-60 (1.5 × 106 years)
Answer:
a) argon-39 (2.69 × 102 years)
b) carbon-14 (5.73 × 103 years)
c) calcium-41 (1.03 × 105 years)
d) krypton-81 (2.29 × 105 years)
e) iron-60 (1.5 × 106 years)
f) hafnium-182 (9 × 106 years)
Explanation:
The most unstable isotopes would be the one which will have small half life. A half life depicts the time period in which a radioactive isotope would reduce to a quantity just half of its originals quantity. Thus isotopes with high half life period will take much longer time to reduce to their original quantity. Thus on arranging the given isotopes in decreasing order of stability, the following series is obtained –
a) argon-39 (2.69 × 102 years)
b) carbon-14 (5.73 × 103 years)
c) calcium-41 (1.03 × 105 years)
d) krypton-81 (2.29 × 105 years)
e) iron-60 (1.5 × 106 years)
f) hafnium-182 (9 × 106 years)
What do most birds do in the wintertime?
A.
They stay in their nests all winter to keep warm.
B.
They group together to keep each other warm.
C.
They find a warm garage or vacant building to live in.
D.
They fly south for the winter because more food is available and it is warmer.
NEED HELPPP!
Answer:
I believe the answer is D.
The technical definition of that phrase is migration, if that clears it up a little more.
Hope this helps!
D. They fly south because it’s warmer and there is more food available
Which of the following items transforms electrical energy into thermal energy? A. Watching your favorite TV show in the living room. B. A gas fireplace to keep you warm in the winter. C. Burning charcoal to cook a steak. D. A stove cooking a casserole.
Answer: i beleive it is D but read the expalantion
Explanation: B and C both use fossil fuels to creat heat. The stove creats heat using electrcity but not all stoves do use eltricity. A) the tv one is not made to creat heat but they do if you leave it on for a while. But i really think D is your best option or the one that makes sense.
I hope this helps you out a thank and a brainlist would be greatly appreciated.
Burning charcoal to cook a steak transforms electrical energy into thermal energy. Hence the correct option is C.
When charcoal burns, it undergoes a chemical reaction that releases heat, which in turn heats up the grill or cooking surface. This process transforms electrical energy (if the charcoal is ignited using an electric starter) or potential energy (if ignited manually) into thermal energy, which is used for cooking the steak.
Explain intelligence.
A. the ability to respond to the environment
B. the ability to solve problems and make good decisions
C. the ability to learn from others
D. the ability to be creative
B. The ability to respond to the environment good decision
Answer:
B. the ability to solve problems and make good decisions
Explanation:
Intelligence is attained in many different ways through many influences, both social and personal.
The secretions of endocrine glands _____
Answer:
The glands are organs that discharge certain chemical substances
Explanation:
endocrine glands are glands whose secretions (called hormones) are collected by blood and reach tissues through circulation. the hypophysis (pituitary gland) and the adrenal glands are examples of endocrine. Hope this helps, if does please give braniliest
Answer:
Endocrine glands are ductless glands of the endocrine system that secrete their products, hormones, directly into the blood.
-TheUnknownScientist
Occur when the normal developmental process of the nervous system is disrupted.
Answer:
The affected organism dies shortly after birth (as a result of severe brain defects, ..... Development usually occurs in a rich environmental milieu, and most animals ... also be the source of chemicals that disrupt normal developmental processes.
Explanation:
When the development of such neurological system becomes disrupted, neurodevelopmental problems emerge.
What is neurological system?The brain or even spinal cord composes up the central nervous system, one of the two major components of the nervous system.
What is development?
The development would be the phenomenon of growth, the acquisition of new knowledge, or an occasion.
Therefore, when the development of such neurological system becomes disrupted, neurodevelopmental problems emerge.
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Will mark brainliest for first answer, and 25 points!!!!!
Embryonic stem cells are cells derived from an embryo. These cells can be used to create new tissues for patients suffering from certain illnesses and disorders. Which statement best summarizes why the use of embryonic stem cells could be seen as unethical?
A.
Some people consider embryos to possess rights equal to those of fully developed human beings.
B.
Extracting stem cells from embryos is a very energy-intensive process, which consumes resources that could be used elsewhere.
C.
Embryos are difficult to obtain, so the monetary cost of using them for research outweighs their benefit.
D.
The process of extracting stem cells from embryos generates biohazardous waste that cannot be safely disposed of.
I would say A is correct.
With the abortion situation that is currently going on in the U.S, pro-lifers biggest argument is that by killing an embryo you are killing a fully developed person. These people believe that the embryo shouldn’t be killed because it didn’t give consent, and it has full rights even before being born. Using the same embryo for treating patients most likely triggers the same argument for people.
3. Which of the following species has the highest reproductive potential?
A. rabbit
B. elephant
C. human
D. horse
The answer is rabbit. ( A.)
Answer:
rabbit
Explanation:
One organ system may be composed of many ________.
Answer:
Organs -usa testprep
Explanation:
Answer:
the answer is organs
Explanation:
i have usatestprep
Alcohol is a
A. Stimulant
B. Narcotic
C. Depressant
D. Hallucinogen
I believe is a Depressant C.
Answer:
C. Depressant.
Explanation:
It is depressant because it slows down brain functions
Select all that apply. Invertebrates have only nonspecific immunity, which means _____.
A.) the body attacks anything foreign to the body
B.) the body attacks particular foreign invaders
C.) immunity is inborn or innate
D.) immunity is adaptive
A and C. Attacks foreign bodies and it’s inborn.
Answer:
A and C are correct.
Explanation:
The nonspecific immunity is going to work since born. The body born with some general immune defenses that are general, that mean, is going to react to different invaders.
In general, when a substance changes from a solid to a liquid, A. the density of the substance remains the same. B. the substance no longer has density since density is a property only solids have. C. the density of the substance increases. D. the density of the substance decreases.
Answer:
D
Explanation:
The density of a substance is dependent on mass and volume of the substance, so a change in state of matter affect the change in volume which affect the density of the substance
Answer:
The answer on Study Island is...
D. The density of the substance decreases
Explanation:
I did it on Study Island and I got it correct. I hope my answer can help those who need it :)
I need help pwease
The total amount of carbon on Earth is constant.
True or False?
Answer:
True
Explanation:
Although the amount varies, the overall amount of carbon on earth is stable.
Carbon cycle dynamics explained with clarity.
The total amount of carbon on Earth is constant is False. The Earth's carbon cycle is a continuous process where carbon moves between different spheres such as the atmosphere, biosphere, hydrosphere, and lithosphere. While there are fluctuations in carbon levels within these spheres, overall, the total amount of carbon on Earth remains relatively constant due to the cycling of carbon. So, the statement that the total amount of carbon on Earth is constant is false since carbon constantly moves between different reservoirs in the Earth's system.
How a dog meets all charactistics in life
Answer:
by meeting new people
Explanation:
Answer:
B
Explanation:
match the following thank you I appreciate the help
Answer:
11. E
12. B
13. C
14.D.
15. A
16. E. Stroke
17. A. Alzheimer's Disease
18. Encephalitis
19. Concussion
20. Brain tumors
Explanation:
11. The occipital lobe is found at the lower back of the brain. This is the smallest lobe, and it is also known as the visual center of the brain because it helps us process or interpret what we see with our eyes.
12. The frontal lobe is found, as the name suggests, in the front portion of the brain. It controls higher order of thinking skills (this means cognitive skills) like problem solving, decision making, and the like.
13. The pituitary gland is also known as the master gland. It is deemed so because it controls other glands in the endocrine system. It is about the size of a pea and it is found between the the hypothalamus and pineal gland.
14. Technically, the frontal lobe is responsible for language, speaking and memory. However, the frontal lobe, along with the other 3 lobes of the brain is part of the Cerebrum. It is the largest part of the brain.
15. The medulla oblongata is part of the hindbrain, specifically located on the brainstem. It is the lower half of the stem that connects to the spinal cord. It controls functions of the autonomic nervous system like breathing, heart rate, and the like.
16. Stroke happens when the blood supply to the brain is impeded or is insufficient. This deprives the brain of oxygen and the cells in the affected part of the brain then die.
17. Alzheimer's disease is a degenerative disease. It is called degenerative because it is progressive, The brain cells in the cerebrum start to deteriorate and affects the functions that the cerebrum controls.
18. Encephalitis is the inflammation of the brain. It can be caused by many things but infection is usually the cause, particularly viral infections. There are two types of encephalitis: primary encephalitis, which happens when the infection is in the brain itself; and secondary encephalitis, which happens when the infection occurs somewhere else other than the brain.
19. Concussion is a type of trauma to the brain. It usually occurs after a blow to the head that causes your brain to shake inside your skull. A concussion can lead to an altered mental state or even unconsciousness.
20. Brain tumor is the abnormal growth of tissue in the brain. Actually, any abnormal growth of cells is a tumor. Brain tumors can grow on the brain or can also occur as a result of another tumor growing in another part of the body and it metastasizes (spreads) to the brain.
what element differentiate the amino acids of protein from the sugar of carbohydrate
The presence of nitrogen in their amino groups and sometimes sulfur in certain amino acid side chains differentiates amino acids in proteins from sugars in carbohydrates. Sugars typically do not contain nitrogen or sulfur, while amino acids have variable R-groups that provide unique characteristics.
Explanation:The element that differentiates the amino acids of protein from the sugar of carbohydrates primarily lies in the presence of a nitrogen atom within their structure. While both proteins and carbohydrates contain carbon, hydrogen, and oxygen, proteins uniquely include nitrogen within their amino groups (-NH₂), and sometimes sulfur within certain amino acid side chains, such as cysteine and methionine. Sugars generally have the formula Cn(H2O)n and do not contain these nitrogen or sulfur atoms.
Furthermore, what distinguishes the 20 amino acids from one another is the variable 'R' group or side chain attached to their central carbon atom. These side chains can be polar or nonpolar, and their variation gives each amino acid unique characteristics, influencing the structure and function of the proteins they compose.
Amino acids, which are the building blocks of proteins, are differentiated from the sugars of carbohydrates by the presence of a side chain or R-group. This side chain can vary in size and polarity, giving each amino acid its unique characteristics. For example, some amino acids like cysteine and methionine contain sulfur in their side chains, which affects the assembly of proteins containing these amino acids. Sugars, on the other hand, do not have side chains and have a simpler structure than amino acids.
A student rides a bike 2 hours from school to home , making stops along the way. What is the average speed that the student is traveling
The average speed of a student biking from school to home cannot be calculated without the total distance. Average speed is total distance over total time, while average velocity also includes direction. Example calculations demonstrate the differences between speed and velocity.
Explanation:To calculate the average speed of a student biking from school to home, we need to know the total distance traveled and the total time taken. As the question does not provide the total distance, we cannot compute the average speed directly. However, we can examine similar examples to understand how average speed is calculated. For instance, if a student drove 12.0 km to the university in 18.0 minutes, their average speed would be distance divided by time, which is 12.0 km / 0.3 hours (since 18 minutes is 0.3 hours), equaling 40 km/h.
In contrast, average velocity is a vector quantity that depends on the displacement and the time taken. For instance, if the straight-line distance to the university is 10.3 km south of east and the time is still 18 minutes, the average velocity will include both magnitude and direction, e.g., (10.3 km / 0.3 hours, 25.0° south of east).
For a round trip where a student returns along the same path, such as a 30-minute trip to the store with a 6 km total distance traveled, the average speed again is the total distance divided by total time, which is 6 km / 0.5 hours = 12 km/h. However, the average velocity is zero since the initial and final positions are the same, and therefore, there is no net displacement.
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What's evaluated at the G2 checkpoint in mitosis and meiosis?
A. That there are nutrients available for cell growth
B. That growth hormones are aligned and ready to be deployed to the new cells
C. That none of the DNA is damaged in the cell
D. That the cell is large enough to support division
Answer:
The correct answer is option C. That none of the DNA is damaged in the cells.
Explanation:
Control mechanisms in cells during cell division which ensure the proper division of the cells are called cell cycle checkpoints. There are three checkpoints in the cell cycle in meiosis or mitosis-
G1 checkpoint assesses the integrity of DNA. There is intermediate S checkpoint between G1 checkpoint and G2 checkpoint checks if DNA replication is completed or not.
G2 checkpoint checks or assesses the proper chromosome duplication and that none of the DNA is damaged in the cell.
M checkpoint assesses the attachment of every kinetochore to a spindle fiber.
Which of the following is a core issue in Environmental Service Systems? The laws regulating environmental issues are not updated on a regular basis. The methods used to solve environmental issues lack a foundation in science and technology. The politics of government cause a gridlock in the debate and resolution of environmental issues. The damage that is done to the environment can take years to be discovered or fully understood.
Answer:
Environmental Science is an interdisciplinary course covering a wide variety of topics including biology, physics, geology, ecology, chemistry, geography, astronomy, meteorology, oceanography, and engineering. The course also considers ways in which human populations affect our planet and its processes. Of special emphasis is the concept of sustainability as a means of using resources in a way that ensures they will always be around us. The unifying concepts that tie the different areas of environmental science together are as follows:
Science provides a way to learn more about the world and influences how we understand it.
Energy conversions underlie all ecological processes.
The Earth is one interconnected system.
Humans change natural systems.
Environmental issues have a cultural and social context.
Human existence depends in part on increasing practices that will achieve sustainability
Explanation:
which describes the greenhouse effect? A. an artificial process B. dangerous C. natural D. new
Answer:
b dangerous
Explanation:
Answer: The answer would be C. Natural .
Explanation: This is the answer only because greenhouses are collecting the suns sunlight and not letting them out .