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.
Which of the following are social implications of an environmental policy? Check all that apply.
A•loss of jobs
B•poorer air quality
C•less erosion
D•cleaner water waste
E•higher taxes
F•elimination of tourist activities
Answer: A, E, F
Explanation: I just did the problem and I got them correct
Answer:
A,E,F,
Explanation:
just took it on edge
Wild hogs introduced to Texas from Europe became feral after the
hogs escaped from the ranches where they lived. Feral hogs are omnivores
that feed on native plants, crops, and small animals. Feral hogs can damage
an ecosystem by rooting through the soil to look for food and trampling
small plants. Which types of native organisms do feral hogs most likely
compete with for food sources?
Mark only one oval.
1)Carnivores and producers
2)Herbivores and carnivores
3)Producers and decomposers
4)Decomposers and herbivores
Answer:
2)Herbivores and carnivores
Explanation:
Because it feeds on small animals and plants.
Answer:
2) Herbivores and carnivores
Explanation:
Feral hogs are omnivores that feed on a variety of sources including native plants, crops, and small animals. Therefore, they compete with both herbivores and carnivores for food sources.Feral hogs can cause significant damage to an ecosystem by rooting through the soil and trampling small plants. They can also disturb the soil and contribute to erosion. Feral hogs have become a major problem in many parts of the United States, including Texas.
Really late
A child is born with a genetic disease caused by mutations found in mtDNA (mitochondrial DNA); How did the child inherit this disorder? A) The child received the mutation from his mother. B) The child received the mutation from the father. C) The child inherited a recessive allele from each parent. D) All mitochondrial diseases are caused by the inheritance of one dominant allele.
Answer:
d
Explanation:
its easy as pie.
The D string on a violin has a frequency of 293 Hz when it is in tune. Calculate the period.
Answer:
Answer:The Time (period) is 0.003 s
Step-by-step explanation:
The period is equal to Time.
the formula for calculating Time (period) is:
Time (period)= 1/frequency
frequency= 293 hz
Time (period) = 1/293
= 0.003
If The D string on a violin has a frequency of 293 Hz when it is in tune, its period is equal to 0.003 s.
What is period?The period is the length of time required to finish a circuit. The inverse of this, or the amount of cycles in a second, is frequency. The wavelength is the distance that sound moves in one period.
Time is equivalent to the period.
Time (period) is calculated using the following formula:
Period (time) Equals 1/frequency
Frequency=293 hertz
Period (time) Equals 1/293
= 0.003 s
As an illustration, if a newborn baby's heart pulses 120 times per minute, its period—the space between beats—is half a second 60 seconds divided by 120 beats.
Therefore, the period is the reciprocal of the frequency because it is the length of time for one cycle in a repeating occurrence.
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1-Paragraph that explains an example of natural selection . (3-5 sentences)
Answer:
In a habitat there are red bugs and green bugs. The birds prefer the taste of the red bugs, so soon there are many green bugs and few red bugs. The green bugs reproduce and make more green bugs and eventually there are no more red bugs.
Answer:Natural selection is the process in nature by which organisms better adapted to their environment tend to survive and reproduce more than those less adapted to their environment.For example, tree frogs are sometimes eaten by snakes and birds. Gray Tree frogs blend well in dark wooded areas on tree bark and Green Tree frogs blend in well with green vegetation found in marshes and swamps. A Green Tree frog on the bark of a tree is easier for a predator to find, compared to a Green Tree frog on a green leaf. So, Green Tree frogs that go into habitats where they are not camouflaged are more likely to be eaten by predators. Since Tree frogs that have been eaten do not live to have any more baby Tree frogs, natural selection has favored Tree frogs that live in habitats in which they are more camouflaged.
When calculating population growth
and reproductive potential, which will
make the biggest impact?
A. The organism's mass
B. How soon the organism is able to reproduce
C. How often the animal is able to reproduce
D. How many offspring it produces
10/31
Answer:
B. How soon the organism is able to reproduce.
As a result of mitosis, in a human body cell, the nucleus of each daughter cell contains _________ chromosomes.
Answer: 46 chromosomes
Explanation: Each human body cell has 46 chromosomes (2 sets of 23). Mitosis duplicates the chromosomes and distributes them to the daughter cells, leaving 2 daughter cells with 46 chromosomes each.
What are three ways body systems work together to maintain homeostasis?
Answer:
Each organ system performs specific functions for the body, and each organ system is typically studied independently. However, the organ systems also work together to help the body maintain homeostasis.
For example, the cardiovascular, urinary, and lymphatic systems all help the body control water balance. The cardiovascular and lymphatic systems transport fluids throughout the body and help sense both solute and water levels and regulate pressure. If the water level gets too high, the urinary system produces more dilute urine (urine with a higher water content) to help eliminate the excess water. If the water level gets too low, more concentrated urine is produced so that water is conserved. The digestive system also plays a role with variable water absorption. Water can be lost through the integumentary and respiratory systems, but that loss is not directly involved in maintaining body fluids and is usually associated with other homeostatic mechanisms.
Similarly, the cardiovascular, integumentary, respiratory, and muscular systems work together to help the body maintain a stable internal temperature. If body temperature rises, blood vessels in the skin dilate, allowing more blood to flow near the skin’s surface. This allows heat to dissipate through the skin and into the surrounding air. The skin may also produce sweat if the body gets too hot; when the sweat evaporates, it helps to cool the body. Rapid breathing can also help the body eliminate excess heat. Together, these responses to increased body temperature explain why you sweat, pant, and become red in the face when you exercise hard. (Heavy breathing during exercise is also one way the body gets more oxygen to your muscles, and gets rid of the extra carbon dioxide produced by the muscles.)
Which of these provides evidence from developmental blology of a shared evolutionary history?
a. the dna sequences of the cytochrome c genes in chimpanzees and spider monkeys are over 90% identical
b. the skeletal structure of a leg of a horse and a flipper of a whale are very similar
c. both snakes and dogs have pelvical bones even though they are vestigial structures of the snake
d. both lobsters and frogs go through metamorphosis as a process in their life cycle
Answer:
b
Explanation:
The evidence from developmental blology of a shared evolutionary history is both snakes and dogs have pelvical bones even though they are vestigial structures of the snake and the correct option is option C.
Snakes and dogs belong to different evolutionary lineages, yet both possess pelvical bones, which are vestigial structures in snakes. The presence of these bones in both species suggests a shared ancestry and evolutionary history.
This indicates that their ancestors once had functional pelvic structures, but over time, snakes lost the need for them and they became reduced and non-functional.
The presence of vestigial structures in different species indicates a common ancestor with a shared developmental pathway, supporting the idea of shared evolutionary history.
Thus, the ideal selection is option C.
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Which of these fields of scientific study involves investigating the physical
processes that occur within Earth?
O
A. Geophysics
O
B. Meteorology
O
c. Geography
O
D. Biology
Final answer:
Option A. Geophysics is the field of study that investigates the physical processes within Earth, using principles of physics to study the planet's interior and phenomena such as seismic waves and magnetic fields.
Explanation:
The field of scientific study that involves investigating the physical processes that occur within Earth is Geophysics. This field applies principles of physics to study the Earth's interior and includes the investigation of seismic waves, magnetic fields, and gravity. Geophysics is a branch of earth science alongside others, such as geomorphology, oceanography, and climatology, which fall under the broader category of geography. Other branches of science include physiology, which is the study of the function of an animal's or a plant's body, and agriculture, which deals with the cultivation of plants and raising animals for food, fiber, and other products.
In this lesson, you learned about an analogy between parts of our society and some organelles. Now, your job is to come up with an analogy between organelles and a school. Be sure your analogy contains a comparison between four organelles and four parts of a school. Additionally, your response should include an explanation as to why the analogy works for that particular organelle. The analogy has been started for you below.
In comparing a school to a cell, the main office would be like nucleus because this is where the information is stored and it functions as a "control center" for the school.
1. Membrane, maybe a fence around your school or the walls as it is physical barrier between the cells internal environment and the outside.
2. Chloroplast, cafeteria, it generates food for the cell.
3. Rough endoplasmic reticulum, corridors, it transports proteins.
4. Lysosome, trash can, gets rid of old parts of the cell
___________________________________, and _______________________________ are a few other terms that are also often used to refer to plant biotechnology.
(Please hurry)
Answer:
Explanation:
tissue culture and mutational breeding
What’s the answer to this earth science question?
Note that the evidence shown on the map that indicates point B is most likely experiencing precipitation is the front represented by the line with bumps moving from low to high pressure.
On the map, the indication that point B is likely experiencing precipitation is the presence of a front represented by a line with bumps moving from low to high pressure.
This front typically denotes a transition zone where warm and cold air masses meet, leading to atmospheric instability and potential precipitation. As the front advances, it often brings changes in weather conditions, including cloud formation, rainfall, or other forms of precipitation, affecting areas along its path such as point B.
All of these are reasons why viruses make good carriers for gene therapy,except
A)viruses are very good at targeting specific cells
B)viruses already have the methods to bypass the host immune system
C) viruses naturally have all the tools they need to get into a cell and replicate its genes
D)viruses will kill the cells affected by the disease by taking over the cell process to replicate more viral particles
Answer:
C
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How do animals and plants depend on one another and on nonliving things in a tropical rainforest ecosystem?
Answer:
By consuming
Explanation:
When something is eaten, it sends energy to the other organism
Jana made a table to help her review the types of mutations for an exam. She started with the sequence THE MAN SAT TALL. Which statement best describes Jana’s error in the table? The insertion sequence should be the deletion sequence. The substitution sequence should be the insertion sequence. The insertion and deletion sequences should be switched. The substitution and deletion sequences should be switched.
Answer:
D
Explanation:
Just answered the question
This question is incomplete as the sentences depicting mutated sequences are not included. The complete part is:
1) The cat was red 2) The fat aca tsa t 3) SHE Has The DG
The answers are:
1. The cat was red - Substitution
2. The fat aca tsa t - Insertion
3. SHE Has The DG - deletion
What is mutation?A mutation, as stated in this question, is an alteration in the nucleotide sequence of a gene, which can alter the gene product. In this question, each sentence is made up of three‑letter words, representing mRNA codons. The sentences are:
THE FAT CAT SAT
THE CAR WAS RED
SHE HAS THE DOG
A substitution mutation is that mutation involving the replacement of a nucleotide by another in a sequence. In the sentence; THE CAR WAS RED, R letter was replaced by letter T, hence, the sequence/sentence changed to THE CAT WAS RED.
An insertion mutation involves the addition of a nucleotide into the original sequence. In the sentence/sequence; THE FAT CAT SAT, letter A was added in between "fat" and "cat" to change the sentence to THE FAT ACA TSA T.
Deletion mutation involves the removal of a nucleotide from an original sequence. In the sentence/sequence; SHE HAS THE DOG, letter O was removed from the sentence to change it to SHE HAS THE DG.
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Which element or elements in the periodic table are most similar to the reactivity to chlorine
15 POINTS Imagine that you are playing in a basketball game. Write 3-5 sentences
describing different forces observed during the game. Remember, any time an
object's motion changes, there must be some kind of force acting on it.
Answer:
A friction force occurs in the shoes that are played and the floor of the court.When the ball spins, a centripetal force occurs that prevents the ball from moving away from the center of its rectilinear motion. The weight force allows the ball to fall back to the ground because without it it would be suspended in the air, it would not bounce, which would make basketball an impossible game.Which is NOT something shown in the diagram below?
A. convection
B. a local wind
C. a land breeze
D. a region of high pressure
Answer:
C
Explanation:
What is the correct amino acid sequence for the mRNA code AUGCCAGUAUG?
(a) Tyr-Gly-Arg-His
(b) Met-Pro-Ala-Val
(c) Tyr-Gly-His
(d) Met-Pro-Val
The sequence of amino acid for the given mRNA code is Methionine-Proline-Valine.
What is a codon?It is a trinucleotide sequence of RNA or DNA, which corresponds to a particular amino acid. The genetic code illustrates the association between the DNA base sequence within a gene and the corresponding sequence of protein, which it encodes.
The sequence of the gene is read based on the groups of three bases. In total there are 64 distinct codons, of which 61 codes for amino acids and the rest three are used as stop signals. On seeing the mRNA code AUGCCAGUAUG, it can be seen that,
AUG codes for methionineCCA codes for prolineGUA codes for valineUG is not a codonTherefore, the correct amino acid sequence will be Methionine-Proline-Valine.
Thus, the correct answer is option d.
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What part of a flower forms a fruit?
a.Stamen
b.Anther
c.Stigma
d.Ovary
Answer:
d.Ovary
Explanation:
The part of the stamen where pollen is produced. Pistil: The ovule producing part of a flower. The ovary often supports a long style, topped by a stigma. The mature ovary is a fruit, and the mature ovule is a seed.
The Earth is populated mostly by unicellular organisms, such as bacteria. However, there are many multicellular organisms as wel
Which of the following is a multicellular organism?
A
flower
B
human
C
all of these
Answer:
all of these
Explanation:
A flower, a human, and an insect are all examples of multicellular organisms, so the correct answer is all of these.
What do scientists need to look before developing an argument?
resources, and research them on website
Use the passage to answer the question: What kind of relationship can be found between the clams and the shrimp?
Captionless Image
Question 5 options:
parasitism
predation
competition
commensalism
mutualism
Answer:
mutualism
Explanation:
The transfer of pollen from the stamens to the pistil of a flower begins the process of which of the following?
A. Germination
B. Oxidation
C. Fertilization
D. Transpiration
Answer: Fertilization
Explanation:
ANSWER ASAP PLZ!!!
What is the end result of using a technique known as polymerase chain reaction
is it B,C, OR D???
The answer is C; Many copies of a DNA Fragment
The specific DNA sequence has been doubled. This cycle of Denature-Anneal-Extend is repeated, usually about 35 times, by using a thermocycler over 2-3 hours (the "chain reaction" of PCR). This produces 34,359,738,368 copies of DNA (That's 2^35)!
PCR is a technique used which is used to amplify DNA so, many copies of a DNA fragment will get as a end result of using PCR.
What is DNA?DNA stands for deoxyribose nucleic acid.It is a self-replicating substance that makes up the majority of chromosomes in practically all living creatures. It carries genetic information of living beings.What is PCR polymerase chain reaction?Kary B. Mullis, an American scientist, invented PCR in 1983.The polymerase chain reaction (PCR) is a laboratory technique used for rapidly amplifying millions to billions of copies of a single DNA region.PCR entails selecting a portion of the genome to be amplified using short synthetic DNA fragments called primers, followed by several rounds of DNA synthesis to amplify that segment.Amplification is accomplished by a three-step process:-Denaturation is the process of heating double-stranded DNA templates to separate the strands at 95°C.Annealing is the process of short DNA molecules called primers binding to flanking regions of target DNA at 55°C.Extension is the process of DNA polymerase extending the 3′ end of each primer along the template strands at 72°C.These processes are performed 25–35 times to make precise copies of the target DNA exponentially.
Hence, the correct option is D.
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Describe the relationship between the sickle cell phenotype and hemoglobins structure and function.
Answer:
It would be harder for the hemoglobin to move oxygen throughout the body because of how sickle cell looks/ its structure.
Sickle cell is a red blood cell but looks like a hook (in my opinion) while red blood cells are typically round, making them easier to transport in veins. due to the shape, it is harder for the blood to be transported.
Explanation:
A field study on tomato growth has two groups. One receives fertilizer A, and one receives no added
fertilizer. Each group has ten tomato plants. The researchers set up five plots, each with the same planting
positions and same numbers per group.
What is the sample size in this study?
DONE
How many replications of the study are done?
DONE
When doing final statistics on the study, how many tomato plants can be analyzed for each group?
DONE
Answer: 10, 5, 50
Explanation:
The sample size in this study is 20 (10 tomato plants in the group receiving fertilizer A and 10 in the group without added fertilizer).
Five replications of the study are done.
For final statistics, a total of 20 tomato plants can be analyzed for each group.
In this field study on tomato growth, we have two groups: one receiving fertilizer A and another receiving no added fertilizer. Each group consists of ten tomato plants.
Sample Size:
The total number of tomato plants in both groups is
10+10=20. Therefore, the sample size in this study is 20.
Replications:
The researchers set up five plots, each with the same planting positions and the same number of plants per group.
Each plot represents a replication of the study.
Plants Analyzed for Each Group during Final Statistics:
For each group, there are a total of ten tomato plants.
Therefore, during final statistics, ten tomato plants can be analyzed for each group.
In summary, the sample size is 20 (representing the total number of tomato plants), there are five replications of the study (each in a different plot), and for final statistics, ten tomato plants from each group (fertilizer A and no added fertilizer) can be analyzed.
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Which of the following accurately describes a cause for a change in blood flow?
•Consistent exercise strengthen the heart so that it doesn't have to work as hard so blood pressure is
increased.
•The walls of blood vessels lose elasticity causing resistance which increases blood pressure.
•A disease causes an increases blood viscosity which in turn increase the speed of blood flow.
•An accident causes excessive bleeding that leads to a decrease in blood fluid volume and high blood
pressure.
Answer: B The walls of blood vessels lose elasticity
Explanation: This usually happens with arthrosclerosis.
Final answer:
Several factors can cause a change in blood flow, including consistent exercise, loss of elasticity in blood vessel walls, increased blood viscosity due to disease, and excessive bleeding.
Explanation:
Blood flow is the movement of blood through a vessel, tissue, or organ. The slowing or blocking of blood flow is called resistance. Blood pressure is the force that blood exerts upon the walls of the blood vessels or chambers of the heart. There are several factors that can cause a change in blood flow. For example, consistent exercise can strengthen the heart so that it doesn't have to work as hard, resulting in increased blood pressure. The walls of blood vessels losing elasticity can cause resistance and increase blood pressure. A disease can cause an increase in blood viscosity, which in turn increases the speed of blood flow. Lastly, an accident causing excessive bleeding can lead to a decrease in blood fluid volume and high blood pressure.
The growth of a plant toward light is an example of _____.
adaptation
response
homeostasis
metabolism
Answer: The correct asnwer is response