6. In fossils, what anatomical evidence indicates that gills were present?
7. Many transitional species had gills which means that they lived in
8. Lungs allow an animal to breathe _____________. Why did this adaptation evolve?
9. Tetrapods use ____________ to breathe. Do any modern tetrapods have gills? Explain.
13. Most modern tetrapods have ___________ digits on front limbs and __________ digits on back limbs, although some species have fewer. How does this number compare to the number of digits on the limbs of transitional fossil forms?
14. Why do many of the transitional fossils between fish and tetrapods have flat heads?
15. How did the anatomy of the shoulder and head change during tetrapod evolution?
16. ___________________ and __________________ are fossil species have characteristics unique to fish as well as characteristics found in fish and tetrapods. Describe the characteristics of lobe-finned fish that are similar to those of tetrapods.
17. Which lobe-finned fish is alive today? ________________________
18. Acanthostega and Icythyostega have been called fish-like tetrapods. Explain why they are described as such and describe the environment in which they probably lived.
19. Why is Tiktaalik such an important transitional fossil?
20. __________________ and _____________________ are early tetrapods that do not have features
unique to fish. Describe how these two species differ anatomically and what that means about where they each lived.
Answers
Answer and explanation:
6. In fossils, what anatomical evidence indicates that gills were present?
The anatomical evidence found in the fossils, such as special bone structures in the shoulders and skulls to support the gills, allows us to know the existence of these structures in some ancient species.
7. Many transitional species had gills, which means they lived in aquatic environments.
Gills are structures which allow people to breathe underwater, and many evolutionary transition species had them, such as the Tiktaalik, which also had lungs.
The existence of gill and lung respiration is what leads us to think that transition species were the first to leave the aquatic habitat to become terrestrial tetrapods.
8. Lungs allow an animal to breathe air. Why did this adaptation evolve?
Species considered transitional between fish and land animals were equipped with both gills and lungs.
It is suggested that the appearance of the lungs is due to the lower concentration of oxygen in the water and the need to obtain oxygen from another source, such as air, where the oxygen concentration is higher. In these circumstances, increased oxygen demand forced some animals to leave the aquatic habitat.
9. Tetrapods use lungs to breathe. Do any modern tetrapods have gills? Explain.
Some present-day tetrapods - such as salamanders, toads and frogs - are amphibians, and in their larval stage they remain in an aquatic habitat, so they are equipped with gills during this stage of their life cycle.
In amphibians like the frog, the passage from the larval stage to the adult stage involves a process called metamorphosis, in which the gills disappear and the lungs develop, in addition to the appearance of the four limbs, which are absent in the larva.
13. Most modern tetrapods have five digits on front limbs and five digits on back limbs, although some species have fewer. How does this number compare to the number of digits on the limbs of transitional fossil forms?
The transitional species originally had fins, but fossils of the first tetrapods have been found with developed limbs and five or more digits, representing an equal or greater number of digits than current species.
An example of a larger number of toes is represented by the genus Acanthostega, with eight toes on each limb.
14. Why do many of the transitional fossils between fish and tetrapods have flat heads?
Many of the transition fossils between fish and tetrapods have flat heads, from top to bottom, because these species participated in the transition between aquatic and terrestrial habitat, adapted to living in shallower waters near the surface, and with gill and lung breathing capacity.
15. How did the anatomy of the shoulder and head change during tetrapod evolution?
The changes in the anatomy of the shoulder and head during the evolution of the tetrapod were basically three:
The bony skeleton of the shoulder is separated from the skull, which in aquatic animals was attached. The appearance of the neck, between both structures. Development of an independent movement of the skull, with respect to the shoulder and the rest of the body.16. Tiktaalik and Acanthostega are fossil species have characteristics unique to fish as well as characteristics found in fish and tetrapods. Describe the characteristics of lobe-finned fish that are similar to those of tetrapods.
Lobe-finned fish -called sarcopterygians- like dipnoi, are lungfish, given the existence of functional lungs in their body. Another characteristic of lobefish is that each of their fins is attached to a single bone, as in the case of the humerus and femur of mammals.
The existence of lungs and the attachment of the limbs to a bone are common features among lobed finfish and tetrapods.
17. Which lobe-finned fish is alive today?
The coelacanth is one of the oldest species of fish that exist, as they are lobe-finned fish that were thought to be extinct, but still exist.
The characteristic of possessing lungs and bony skeleton relates them to the actual lung fishes and to the terrestrial vertebrates.
18. Acanthostega and Icythyostega have been called fish-like tetrapods. Explain why they are described as such and describe the environment in which they probably lived.
Both the Acanthostega and the Icythyostega were animals characterized by having four extremities and be equipped with gills and lungs at the same time, which determines that they are called tetrapods similar to fish.
Their characteristics made them suitable for living in aquatic and terrestrial environments, so they probably inhabited shallow waters or even the surface of the earth.
The origin of the fish from the tetrapods has been detected with the fossils and their study.
In fossils, the anatomical evidence indicating that gills are present has been the bone structure in the shoulder and skull to support gills.The transitional species having gills have been the indication that they live in an aquatic environment and utilize gills for respiration.Lungs allow the animals to breathe in air. The adaptation has been evolved as there has been to deal with the concentration difference of oxygen in air and water.Tetrapods use lungs to breathe. The tetrapods living in the larval stage in aquatic conditions have been equipped with gills.Most modern tetrapods have five digits on front limbs and five digits on back limbs, although some species have fewer. The fossils at the later stage of the development have been found to be equipped with an equal number of limbs.Many species have transition fossils as the intermediate has been the developmental phase of the fish and tetrapods.While the development from the tetrapod, the shoulder has been detached from the skeleton with the development of the neck. Free movement has been facilitated.Tiktaalik and Acanthostega are fossil species that have characteristics unique to fish as well as characteristics found in fish and tetrapods. The characteristic similar to the lobe fish and the tetrapods has been the presence of the gills.The characteristic presence of the lungs and the body skeleton in the lobe-finned fish supports their existence.Both the organisms have the presence of characteristic gills and fins similar to the fishes.Tiktaalik characteristics are unique to fish as well as characteristics found in fish and tetrapods.Pederpes and Tulerpeton are the early tetrapods that do not have features unique to fish.For more information about the fossils, refer to the link:
https://brainly.com/question/20048416
Related Questions
How does an enveloped virus gain/obtain/get its envelope?
The envelope is produced by the organelles in the host cell.
The envelope is produced by the DNA/RNA of the host cell.
The virus builds its envelope after it has been released from the host cell.
The envelope come from the host cell membrane as the virus leaves the host cell
Answers
Answer:
The envelope come from the host cell membrane as the virus leaves the host cell
Explanation:
A virus is an organism that is incapable of replicating on its own without infecting a living host. A virus consists of a genetic material (DNA or RNA) , a protein coat called CAPSID, and sometimes some viruses possess an envelope, which is an outer covering or enclosure. Viruses that possess this envelope are referred to as ENVELOPED VIRUS.
The virus lacks the ability to produce any structure, hence, they gain this envelope made of phospholipid from the cell membrane of the host they infect. During the infection cycle of a virus, a process called budding enables a portion of the host's plasma membrane to cover or encapsulate the virion cells, hence, making them enveloped in the process.
Who painted the image above?
Answers
Answer:
What image?
Explanation:
Next time please provide pictures and/or options to answer specific questions so we can help you with the problems you may have :)
Thank you...
Good luck deary.... :)
<3
Which path would occur faster,and why is this advantageous? The question is from a gizmo packet. The packet is a student exploration guide named senses.
Please I need an answer right away!?!?!
Answers
Final answer:
P resides closer to the school, P starts earlier for school, Q walks faster and reaches the school earlier
Explanation:
1: Which of the two resides closer to the school?
We can answer this question by knowing the displacements. The total displacements here are OC by P and OD by Q. From the figure, OC < OD. Hence, P resides closer to the school.
2: Which of the two starts earlier for the school?
The start times are point O for P and A for Q on the time axis. Hence, P starts earlier for school.
3: Which of the two walks faster?
The speed is given by the slope of the plot. The slope of the motion of P is smaller than that of Q. Hence, Q walks faster.
4: Which of the two reaches the school earlier?
Q reaches the school earlier since Q walks faster.
Any organism with a notochord and a dorsal nerve cord is classified in subphylum Vertebrata.
O True
O False
Answers
Answer: False
Explanation: The phylum Chordata (chordates) includes two other subphyla: Cephalochordata (e.g. lancelets) and Urochordata (e.g. tunicates). Both subphyla encompass organisms which do possess a notochord and a dorsal nerve cord, lost after the embryonic stage or otherwise.
What is the "snip" rule in Biology?
Thx so much♥♥
Answers
Answer:-if you "snip" below a node, a clade falls off
Explanation:
Carbon is a major component of all organic compounds, including carbohydrates, lipids, proteins, and nucleic acids. Carbon dioxide is continually exchanged between the atmosphere and oceans. What geological process returns carbon to the atmosphere in the form of carbon dioxide?
A) respiration
B) transpiration
C) volcanic activity
D) decomposition of marine sediments
Answers
Final answer:
Volcanic activity is the geological process that returns carbon to the atmosphere as carbon dioxide, playing a crucial role in the carbon cycle by releasing carbon stored within the Earth's mantle.
Explanation:
The geological process that returns carbon to the atmosphere in the form of carbon dioxide is volcanic activity. This activity brings carbon stored deep within the Earth's mantle back into the carbon cycle. Volcanic eruptions release carbon dioxide into the atmosphere that was locked in the mantle or in long-term carbon reservoirs such as carbonates and fossilized organic materials.
Other processes involving carbon include photosynthesis, where carbon dioxide is converted to organic carbon by plants and algae, and respiration, where living organisms release carbon dioxide back into the atmosphere. Additionally, carbon is cycled slowly through other geological processes such as the formation and decomposition of limestone, and through human activities like the burning of fossil fuels.
Final answer:
Volcanic activity is the geological process that returns carbon to the atmosphere as carbon dioxide, playing a critical role in the Earth's carbon cycle.
Explanation:
The geological process that returns carbon to the atmosphere in the form of carbon dioxide is volcanic activity. Volcanoes release carbon dioxide gas that has been stored within the Earth's mantle. This process is a part of the carbon cycle, which includes the exchange of carbon among the atmosphere, oceans, and living organisms on Earth. Long-term storage of carbon also occurs when organic matter from living organisms becomes fossilized deep underground, and volcanic activity plays a key role in returning this carbon back to the carbon cycle through eruptions that release stored carbon dioxide into the atmosphere.
the state of the atmosphere in a small geographic area refers to
Answers
Explanation:
The atmosphere is a thin layer of gases that surrounds the Earth. It seals the planet and protects us from the vacuum of space.The lowest layers interact with the surface of the Earth while the highest layers interact with space. On your level, you may feel the atmosphere as a cool breeze.
Final answer:
A microclimate defines the distinct atmospheric state in a specific, limited geographic area, contrasting with the broader climate of the region.
Explanation:
The state of the atmosphere in a small geographic area refers to a microclimate. This is a distinctive climate that can be very different from the surrounding area's climate. Microclimatology is a branch of climatology that specifically examines the climate at a localized level, focusing on variations that occur over short distances.
While weather represents the short-term state of the atmosphere, including conditions like temperature, humidity, and precipitation, climate encompasses the long-term patterns of these atmospheric conditions. The term 'microclimate' reflects the nuanced variations that can exist within even a small geographic locale, possibly due to factors like shading, altitude, or water bodies, which can all influence the localized atmospheric characteristics in a significant way.
Which statement BEST describes a similarity and a difference between photosynthesis and cellular
respiration?
A. Photosynthesis and cellular respiration both use carbon dioxide to create energy, but while animal cells
respire it as a waste product, plant cells absorb it for their use.
B. Photosynthesis and cellular respiration both produce glucose molecules, but while cellular respiration
requires the ingestion of glucose in animal cells, plant cells are able to create their own during
photosynthesis.
C. Photosynthesis and cellular respiration both occur in the chloroplasts, but while photosynthesis only occurs
in plant cells, cellular respiration occurs in both plant and animal cells.
D. Photosynthesis and cellular respiration both produce energy, but while photosynthesis assembles glucose
molecules in plant cells, cellular respiration breaks down glucose molecules in plant and animal cells.
Answers
Answer:
d
Explanation:
photosynthesis creates the end product of glucose used for energy while cellular respiration breaks down glucose in order to make its own energy
Answer:
Option D. Photosynthesis and cellular respiration both produce energy, but while photosynthesis assembles glucose molecules in plant cells, cellular respiration breaks down glucose molecules in plant and animal cells.
Explanation:
Cellular Respiration: A catabolic reaction that occurs in the Mitochondria of all living organisms which involves breaking down glucose or sugar molecules using oxygen to release energy and carbon dioxide.Photosynthesis: An anabolic reaction that occurs in the chloroplast of phototrophic plants involves the production of glucose in the presence of carbon dioxide to release oxygen.The similarity between the two processes is that it involves the usage and production of energy and the exchange of gases.The difference between the two processes is that while cellular respiration breaks down glucose to use in other biological activities, photosynthesis produces glucose as food for the plants.For more information:
https://brainly.com/question/20066477
How can resource availability affect interactions between organisms?
QUICK
Answers
a lack of resources cause organisms to fight for the resources and some organisms use said resources to obtain what they need to survive such as how predators act around a water hole.
The tundra biome receives about the same amount of precipitation as
A. deserts
B. deciduous forests
C. coniferous forests
D. the rainforest.
Answers
A) The tundra biome low precipitation levels, similar to deserts.
Tundra biome is characterized by short growing seasons and little precipitation. Deserts are also characterized by low precipitation levels, making them comparable to tundras in terms of precipitation amount.
What percent of marine creatures live in coastal waters?
Answers
Final answer:
Between 79% and 87% of marine species live in coastal waters, which are rich in biodiversity. Coastal waters are of significant interest to conservation efforts, as they are home to the vast majority of marine creatures.
Explanation:
Although precise estimates can vary, a significant majority of marine species are found within these regions. One figure suggests that 96% of marine species and 70% of terrestrial species are reliant on the coastal ecosystem. Given that invertebrates make up nearly 97% of animal species, with many species like the sea star thriving in coastal zones, the biodiversity in coastal areas is substantial.
Understanding the concentration of marine life in coastal waters is essential for conservation efforts, as highlighted by studies and initiatives like the Tagging of Pacific Predators (TOPP) program. The health of coastal ecosystems is critical not just for the species that live there, but for global biodiversity and human communities as well. For example, many coastal countries are striving to protect coastal and oceanic waters, with the goal of achieving conservation targets to sustain marine populations and ecosystems.
Magnetic fields store energy.
A. True
B. False
Answers
Answer:true
Explanation:because the energy stored is magnetic energy
What is the relationship between auxin and phototropism?
Answers
Answer:
It functions as hormones or chemical messengers.
Explanation:
This shows that somehow one-sided lighting causes less plant tissue to gather on the illuminated side and more to gather on the shaded side. This makes the cells on the shaded side grow and enlarge faster, causing the sprout to bend towards the light.
What separates rabbits/primate from the crocodiles on this cladogram?
Answers
Answer:
eggs with shells
Explanation:
Crocs lay eggs and rabbits dont.
Explain how ligand A and ligand B can cause identical cellular responses in a cell?
Answers
Ligand in cell signaling is defined as the molecules, which bind to specific receptors. Two ligands, for instance, ligand A and ligand B can generate a similar cellular response by binding to different receptors.
The ligands interact with the specific molecule in the target cell. If two same ligands are attached to the two different receptors, then they will generate two different responses.
Acetylcholine is such an example of a ligand, which when attached to two different receptors will generate the same response.
This type of response can also be generated in epinephrine and glucagon. These ligands are responsible for controlling the transcription process in the DNA molecule.
Therefore, the ligands are the molecules that bind to the receptor and generate a signal.
To know more about ligands and cell signaling, refer to the following link:
https://brainly.com/question/21626532
Ligand A and ligand B can cause identical cellular responses by binding to the same receptor or different receptors that activate the same signal transduction pathway using common second messengers and similar downstream components.
Explanation:The phenomenon where ligand A and ligand B cause identical cellular responses can be explained through the concept of signal transduction pathways. These pathways start with the binding of a ligand to its specific receptor, initiating a cascade of biochemical events inside the cell. It is possible for different ligands to bind to the same type of receptor (or different receptors that trigger the same pathway) and produce the same response due to the use of common second messengers and similar downstream signaling components within the cell.
One scenario is that different cell types produce the same receptor, which binds to the same ligands, but triggers different responses in each cell type. Alternatively, cells may contain different genes that produce different receptors capable of binding to the same ligand, leading to diverse responses. Moreover, the interaction between ligands and G-protein-linked receptors, ligand-gated ion channels, and receptor tyrosine kinases can activate varied intracellular reactions even though the same second messengers are involved.
In the context of autocrine signaling, a cell may send and receive the same signal, which can regulate processes such as pain sensation, inflammation, and programmed cell death. Whether the signal impacts only the signaling cell or also affects neighboring cells can determine the overall biological outcome. Such specificity in signaling allows for precise control over cellular function and differentiation during organism development.
When scientists look at the bones of a dinosaur, why
do you think they decided the outside of a dinosaur
looks like a lizard rather than a furry animal or a
feathered animal?
Answers
Scientists first thought dinosaurs resembled lizards due to their reptilian features and close relation to reptiles like crocodiles. The discovery of feathered dinosaurs like Archaeopteryx has since provided evidence for their bird-like characteristics, although not all dinosaurs were warm-blooded or feathered.
When scientists look at the bones of a dinosaur, they initially surmised that dinosaurs had scaly, lizard-like skin rather than being furry or feathered based on their closest living relatives, such as crocodiles, and overall reptilian morphology. However, recent discoveries have challenged this notion, uncovering the existence of feathered dinosaurs. Archaeopteryx, an ancient fossil, displays characteristics of both dinosaurs and birds, suggesting a transitional form. It possesses both teeth, like dinosaurs, and feathers modified for flight, which are typically associated with birds. These feathery dinosaurs might not necessarily have been warm-blooded like modern birds, as not all dinosaurs had feathers, suggesting a diversity in their thermoregulatory strategies.
Moreover, birds are descendants of a specific group of dinosaurs known as theropods, sharing several anatomical features, such as a furcula and specific bone structures in their hips and wrists, further supporting the feathered dinosaur hypothesis. Despite this feathered evidence, not all dinosaurs were endothermic, and the depictions of dinosaurs as lizard-like may have originated from the fact that some dinosaurs indeed had scaly skin, and this representation became culturally embedded before the discovery of feathered dinosaur fossils.
How does the respiratory system help build social relationships?
The respiratory system helps create sound that enables humans to communicate with each another.
The respiratory system helps prevent the spread of disease so humans are able to live in communities together.
The respiratory system helps humans have feelings and base decisions on those feelings.
The respiratory system helps humans remember and recall memories of friends and special times.
Answers
Answer:The respiratory system helps create sound that enables humans to communicate with each another.
Explanation:
Answer:
The respiratory system helps create sound that enables humans to communicate with each another.
Explanation:
Zebra mussels have the following genotypes and phenotypes. Which cross would the greatest number of heterozygous offspring. A) AA x aa C) AA x Aa or D) aa x Aa
Answers
Answer:
In Zebra mussels the cross that would the greatest number of heterozygous offspring is AA X aa (option A).
Explanation:
For a specific trait the cross that provides the greatest amount of heterozygous offspring is that of two pure lines, dominant and recessive. In this case, AA x aa will have a 100% probability of heterozygous (Aa) offspring, as can be seen in a Punnett chart:
Alelles A A
a Aa Aa
a Aa Aa
AA X Aa will only have a 50% chance of heterozygous offspring, as will the cross aa X Aa.
- AA X Aa
Alelles A A
A AA AA
a Aa Aa
- Aa X aa
Alelles A a
a Aa aa
a Aa aa
A heterozygous genotype results in two different alleles being found in one gene, which determines a specific trait, where the dominant characteristic is expressed in the phenotype.
A) AA x aa
yuh lololololololol it wouldn't let me explain. but this is correct
What survival stimulus makes an animal thirsty?
Answers
Answer: Survival and reproduction of animals results from genetic variation in their behavior and physiology. differential survival and evolutionary theory. variation exists among individuals, most offspring do not survive to reproduce, some survive and produce more offspring.
Which of these human behaviors has the greatest potential to harm the environment
Answers
A. The use of technology to speed harvesting of resources is the human behavior with the greatest potential to harm the environment. This is because it leads to overharvesting, where resources are extracted faster than they can replenish. Examples include overfishing and deforestation due to efficient, mechanized methods.
The behavior with the greatest potential to harm the environment is A. Use of technology to speed harvesting of resources. This is primarily due to the concept of overharvesting, where advanced technology allows for more efficient and extensive extraction of natural resources, often at unsustainable rates. Overharvesting depletes natural resources faster than they can replenish, leading to the decline or extinction of species and the degradation of ecosystems.
For example, advanced fishing technologies can lead to overfishing, depleting fish populations quicker than they can naturally recover. Similarly, mechanized logging can lead to rapid deforestation, with significant impacts on biodiversity and climate.
The complete question is : Which of these human behaviors has the greatest potential to harm the environment? A. Use of technology to speed harvesting of resources B. Focus on steady harvesting of abundant resources C. Efforts to harvest easily replaced resources D. Use of technology to obtain difficult-to-harvest resources
More and more bacteria are becoming antibiotic-resistant. How might this affect our ability to fight certain infectious diseases in the future? *
Answers
Answer:
this would make more bacteria resistant to antibodies which could lead to extreme sickness or even death
What survival advantage does an unhinged jaw give the California Kingsnake?
better vision due to eye positioning on head
greater efficiency in oxygen absorption
ability to conform to tight spaces
Answers
Answer:
The unhinged jaw allows the snake to eat something larger than its mouth could open in the snake couldn't unhinge its jaw.
Explanation:
Are viruses always fatal?
Answers
Answer:
No
Explanation:
The short answer is no, but the more complex one is that it depends on the virus. In the case of *****-19, the answer is no, as many people have recovered from it. But almost any viral infection can lead to sepsis, which is a chain reaction that can trigger inflammation throughout the body and damage multiple organs. This, however, is very rare, though potentially fatal.
Answer:
Not all viruses are fatal.
Explanation: This pandemic is a virus thing that is going around and not all people are dying. There is some people who have the virus and got "rid of it". Not all viruses is fatal because viruses can include not only bacteria, but it can spread through saliva, air, blood.I hope this helps.
What is the really scientific word for rain sleet snow hail
Answers
ANS: The scientific term of rain sleet, snow and hail is precipitation.
which resource is renewable
Answers
Answer:
Pinto beans
Explanation: because you can grow them again and again.
Please Help!! We know that the electromagnetic spectrum uses wavelengths and frequencies to determine a lot about outer space. How does it help us find out the make-up of stars?
Answers
What is the spinal cord made up of?
Answers
Answer:bone
Explanations brain
where are the eggs produced and stored in the female body
a
b
c
d
Answers
Answer: The ovaries.
Explanation: The ovaries are two oval-shaped organs that lie to the upper right and left of the uterus. They produce, store, and release eggs into the Fallopian tubes in the process called ovulation.
Does the structure of the Rock change as it transforms into a
Metamorphic Rock
Answers
Answer:
Yes
Explanation:
The new conditions cause the structure of the rock to change and new minerals to grow in place of the original minerals. The rock becomes a metamorphic rock.
The main parts of the first line of defense for the human body against disease are______ and _______ .