The fossil record provides evidence of five mass extinctions. Scientists compare fossils found in rock layers to find evidence about how organisms were affected by extinction events. Which of the following images shows evidence of an extinction event?
How are the bones in the fin structure of the Tiktaalik evidence of a transition from fish to amphibian?
Scientists use evidence from their findings to support theories of life on earth. Which of these findings could NOT be used to provide supporting evidence that life on earth has changed over time? *
A. increasing complexity of fossils in younger rock layers
B. increasing diversity of fossils in rock layers following an extinction
C. transitional fossils
D. rock layers with no fossils
Organisms with more complex body plans are more likely to be found in younger rock layers. This prediction is based on observed patterns of the increasing complexity of physical structures in organisms over time.
True
False
It is impossible to tell from this information.
PLEASE HELP
Answers
Related Questions
Describe an example of how forests are used as a resource. What is one advantage of using the resource in this way? What is a disadvantage?
Please help!!
Answers
Answer:
They are used as resources because of the trees. the government uses the trees to make paper and other necessary objects for the public. the disadvantage is that it makes the earth unhealthier and clearcutting can lead to major problems.
Explanation:
which type of asexual reproduction would be seen in a kitchen? In a Garden? On a walk in the woods? State which types of reproduction can be observed in everyday "real life".
Need help with this ASAP!
Answers
Answer:
1 Binary Fission, budding, fragmentation, spore formation, Regeneration and vegetative propagation.
2
The type of asexual reproduction would be seen in a kitchen Binary Fission and budding. In a garden, vegetative propagation, fragmentation, spore formation, and regeneration.
What is Asexual reproduction?Asexual reproduction may be characterized as a mode of reproduction that does not involve the fusion of gametes or a change in the number of chromosomes. In this mode of reproduction, a new offspring is produced by a single parent. The new individuals produced are genetically and physically identical to each other, i.e., they are clones of their parents.
The types of asexual reproduction that can be observed in everyday "real life" are as follows:
Binary fission: Single parent cell doubles its DNA, then divides into two cells.Budding: Small growth on the surface of the parent breaks off, resulting in the formation of two individuals.Fragmentation: Organisms break into two or more fragments that develop into a new individual.Regeneration: The natural process of replacing or restoring damaged or missing cells, tissues, organs, and even entire body parts to full function in plants and animals.Vegetative propagation: It is an asexual method of plant reproduction that occurs in its leaves, roots, and stem.To learn more about Asexual reproduction, refer to the link:
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Every DNA strand has an EQUAL number of adenine and thymine nucleotides in a molecule. Explain why.
Is this true for cytosine and guanine nucleotides? Explain your answer.
Is this true for cytosine and adenine nucleotides? Explain your answer.
Answers
Where are molecules of water created?
Answers
Answer:
in the nucleus
Explanation:
A water molecule consists of three atoms; an oxygen atom and two hydrogen atoms, which are bond together like little magnets.
All you need to know is in the pic below
Answers
Answer:
A and B
Explanation:
Answer: Condensation and Deposition
Explanation: extra info: Removing Energy: Removing energy will cause the particles in a liquid to begin locking into place. A. Boiling and Evaporation: Evaporation is the change of a substance from a liquid to a gas. Boiling is the change of a liquid to a vapor, or gas, throughout the liquid.
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In the moouth ____________ mechaaanicaaaallyyy (physicaaaally) diggest foood.
AA: Teeth,aamaalyysee
B: Tooungee, cheewwingg
CCC: Teeth, cheewwingg
D: Saaalivaaa, aaaamaalysee
(traaanslation: In the mouth ____________________mechanically (physically) digest food.
A. Teeth,amalyse
B. Tongue, chewing
C. Teeth, chewing
D. Saliva, amalyse )
Answers
f human cells could use the food eaten in that form, there would be no need for a digestive system. The digestive system changes the food into a form that can be used by the cells and that enables the nutrients to get into the blood so they can be transported throughout the body
There are two kinds of digestion: mechanical and chemical. Mechanical digestion involves physically breaking the food into smaller pieces. Mechanical digestion begins in the mouth as the food is chewed. Chemical digestion involves breaking down the food into simpler nutrients that can be used by the cells. Chemical digestion begins in the mouth when food mixes with saliva. Saliva contains an enzyme (amylase) that begins the breakdown of carbohydrates. (An enzyme is a protein that can catalyze certain biochemical reactions).
The Digestive Process
Mouth
Food is chewed into smaller pieces. Adults have 32 specialized teeth—teeth that can grind, chew, and tear different kinds of food. The tongue is an organ consisting of skeletal muscles (voluntary muscles) that move the food around the mouth to allow for efficient mechanical digestion. Salivary glands beneath and in back of the tongue secrete the saliva that allows for easier swallowing of food and the beginning of chemical digestion.
↓
Pharnyx
Swallowing forces the chewed food through a tubular entrance (pharynx) to the esophagus (food tube). As food is swallowed a flap-like valve, the epiglottis, closes over the trachea (windpipe) to prevent food entering the windpipe and causing choking.
The stomach starts chemical digestion of protein. Secretions from the stomach lining consist of about two liters of hydrochloric acid (HCl), pepsin, and other fluids that make up gastric fluids each day. The fluid is extremely acidic and it helps kill bacteria and other pathogens that may have been ingested.
The thick mucus also produced by the stomach lining usually keeps the acids from damaging the lining. If not enough mucus is produced or if too much acid is produced, peptic ulcers form. Heredity, stress, smoking, and excessive alcohol intake can make the ulcers worse. The condition can worsen and bleeding ulcers can result.
Food stays in the stomach for approximately 3-4 hours and moves through another sphincter muscle to pass into the small intestine.
↓
Small intestine
Nearly 7 meters in length, the small intestine is folded and curled around a small area in the abdominal cavity. The inside surfaces of the intestine are covered with projections called villi. These finger-like structures are covered in smaller projections called microvilli and work to absorb food molecules that have been broken down by the processes of chemical digestion.
The small intestine has three distinct parts: the duodenum, the jejunum, and the ileum. Each day, about 9 liters of fluid enters the duodenum. Most chemical digestion takes place in the duodenum by chemicals secreted by the liver, pancreas and small intestine. The other two sections of the small intestine, the jejunum and the ileum, absorb food molecules by way of the villi directly into the blood stream.
Large intestine
The large intestine receives the material “left-over” from chemical digestion that is basically nutrient free. Only water, cellulose, and undigestible materials are left. The main job of the large intestine is to remove water from the undigested material. Water is quickly removed from the material through villi and returns to the blood stream.
Liver
The liver is a large organ located just above the stomach. The liver produces bile which helps digest lipids. Bile is stored in the gallbladder and flows from the gallbladder to the duodenum where it helps digest fats.
The picture at the left shows a human liver.
Gall bladder
The gall bladder is a small, greenish organ located just under the liver. It stores bile produced by the liver until it is secreted directly into the first section of the small intestine.
Pancreas
The pancreas has three important functions that help the digestive system change food into a form that can be used by the cells.
1) It produces enzymes which help break down proteins, lipids, and carbohydrates.
2) It produces the hormone, insulin, which helps regulate blood glucose levels.
3) It produces sodium bicarbonate which helps to neutralize stomach acids.
Checking for Understanding.......
1. What is the function of the digestive system?
To change ingested food into a form that can be used by the cells, to get the nutrients into the blood stream, to reabsorb water, and to eliminate wastes.
2. What is the function of the following parts/organs of the digestive system?
a. mouth—houses teeth, salivary glands and tongue for mechanical and chemical digestion
b. teeth—chews, grinds, and tears food into smaller pieces
c. esophagus—food tube; leads from the pharynx to the stomach
d. stomach—
churns food to mix with gastric enzymes and acid to continue mechanical and chemical diges
Suppose Gene A on the left chromosome is damaged and no longer function. What form of the trait would show? Why ?
Answers
Answer:
An X-linked recessive gene almost never has a counterpart on the Y chromosome. Therefore excessive traits on the X chromosome
Explanation:
Mendel conducted many experiments on pea plants. His
experiments included crosses betwean pea plants with
seeds of different colors, like the one shown.
Parents
First
generation
Х
Yellow
Green
Yellow
What did Mendel conclude from the results of the cross shown?
A. Yellow seed color is codominant with green seed color.
O B. Green seed color is dominant and yellow seed color is recessive.
Ο Ο Ο O
C. Yellow seed color is dominant and green seed color is recessive.
D. Seed color is determined by multiple genes.
Answers
Answer:
c
Explanation:
just took the quiz
help i need help plz ill give brainleist
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Have a nice day! :)
Which of the following organisms would be considered the most important part of the ocean's ecosystem because they are producers?
A: Clams
B: Dolphins
C: Jellyfish
D: Phytoplankton
Answers
Explanation: this feeds the majority of everything in the ocean
What type of cells does a mushroom have?
Answers
A mushroom is a plant, therefore the cell that it has that is different from animal cells would be chloroplasts. However, mushroom also have a specific cells called "fungal cells" which can only be found in mushrooms and fungus.
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Mushrooms are composed of eukaryotic cells. These cells contain a true nucleus and other membrane-bound organelles.
What are eukaryotic cells?Eukaryotic cells are a type of cell that contains a true nucleus and other membrane-bound organelles. They are characteristic of all organisms in the domain Eukaryota, which includes plants, animals, fungi, and protists. Eukaryotic cells are typically larger and more complex than prokaryotic cells, which lack a true nucleus and other membrane-bound organelles.
Eukaryotic cells also have cytoskeleton, which helps in maintaining the shape of the cell and movement of organelles. They have a plasma membrane that controls the exchange of materials with the environment and a cytosol, a gel-like fluid that fills the cell and surrounds the organelles.
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Mitosis is a type of cell division that occurs
I. to make more cells so organisms can grow.
II. so organisms can replace old or damaged cells.
III. when organisms make sex cells for reproduction.
IV. only during fetal stages of development.
Answer Choices:
A. I, II, and III only
B. II, III, and IV only
C. I and II only
D. I and IV only
Answers
Answer: a type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus, typical of ordinary tissue growth.
In cell biology, mitosis is a part of the cell cycle in which replicated chromosomes are separated into two new nuclei. Cell division gives rise to genetically identical cells in which the total number of chromosomes is maintained
Answer:
C. I and II only
Explanation:
Statement I is correct because mitosis is the process that allows for cell growth, since it creates more cells in the body.
Statement II is also correct because mitosis allows for growth and repair. It creates new cells that replace old ones.
Statements III and IV are wrong. Meiosis, instead of mitosis, is the process that creates sex cells. Additionally, mitosis does not only occur during fetal stages of development but occurs throughout one's life.
So, C is the correct answer because only I and II are correct.
why is it important for scientists to do library research before lab research
Answers
Answer: I would say that they could learn more about their subjects that they are experimenting with.
Explanation:
Answer:
Libraries are critically important in helping researchers to exploit the full benefits and opportunities of the networked world, including such developments as open access and social media.
Explanation:
Why might it be important to learn about collisions?
Answers
Answer:
The number of successful collisions can only be calculated for gases, so collision theory can only apply to gases. Collision theory helps scientists predict a rate constant, which can be used in a mathematical formula to help scientists determine reaction rates.
Explanation:
an image that shows light from a light bulb reflecting off aluminum foil all of the light is being reflected do you think that aluminum foil will get heat.
yes or no
explain
Answers
Yes, light from a light bulb reflecting off aluminum foil make it hot.
What is physical properties of aluminium?It has low density, is non-toxic, has a high thermal conductivity, has excellent corrosion resistance and can be easily cast, machined and formed.
Aluminium foil can melt and burn, but it takes extremely high temperatures to be able to do so. This is why you can use it while cooking meals in the oven, and it generally remains intact. It an excellent thermal conductor (being metal), it radiates/conducts away all of its heat so rapidly that it cools off much faster than anything else.
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*spam answers won't be tolerated* Could somebody help, please? Will give brainliest and 100 points!
Which of the following is being used to catch fish?
electricity
light
sound
all of the above
Answers
Answer:
I Believe your answer would be
All Of The Above
Explanation:
have a nice day!
Answer:
D would be your answer all of the above
Explanation:
Is D because i took this question before and is was correct
Soney listed two structures found in seedless vascular plants.
1 - stems 2 - roots
Which structures in nonvascular plants are similar to these two structures?
1 - leaves 2 - spores
1 - stalks 2 - rhizoids
1 - rhizoids 2 - stalks
1 - spores 2 - leaves
Answers
1-stalks 2-rhizoids
Answer:
b
Explanation:
Use the diagram below to answer the next 3 questions.
At which point on the roller coaster will the car have the greatest amount of kinetic energy? Explain why.
Answers
Because at that point the car will be travelling the fastest.
The point at which the kinetic energy of the car is maximum is point X because of the maximum speed of the car at this point.
What is kinetic energy?Kinetic energy is the energy of motion. When an object is in motion, it possesses kinetic energy. It is defined as the energy that an object possesses due to its motion. The amount of kinetic energy an object has is dependent on its mass and velocity.
The formula for kinetic energy is KE = (1/2)mv², where KE is kinetic energy, m is the mass of the object, and v is the velocity of the object. This means that the greater an object's mass and velocity, the more kinetic energy it possesses.
Kinetic energy can be transformed into other forms of energy, such as potential energy or heat, through various processes.
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What are some ways in which you can protect yourself from collisions?
Answers
Answer:
Limit your night driving, limit your passengers, Get as much supervised practice driving as possible, and always use your seatbelt.
Explanation:
Simple search
Answer:
wearing a seat belt
Explanation:
because when you slam on the brakes the seatbelt locks so you wont go flying
How is excess thermal energy released from your body?
A: Running
B: Increased breathing rate
C: Perspiration
D: Laughing
Answers
Answer:
Perspiration
Explanation:
A group of students is investigating whether air resistance depends on the size of an object. The students throw two paper pieces each with the same force. One piece of paper is flat and the other is scrunched into a ball. The distance traveled by each paper piece is shown.
Experimental Observations
Student 1 Student 2 Student 3 Student 4
Distance traveled by flat paper 0.2 m 1.2 m 1.5 m 0.8 m
Distance traveled by scrunched paper 1.5 m 2.4 m 3 m 2 m
What was the test variable (independent variable) in this experiment?
Distance traveled by flat paper
The shape of the paper
Distance traveled by scrunched paper
The number of students
Answers
Answer:
The shape of the paper.
Explanation:
Flat Piece of Paper: Flat, (quite obvious haha) and not the easiest to throw
Scrunched up piece of paper: Easier to throw because it's simply in the shape of a ball, hence a ball being easy to throw. (:
What are some activities you may engage in that could involve collisions?
Answers
Answer:Football
Explanation:
What is the average speed (mph) for a car journey of 140 miles that began at
9:30 am and finished at 12:00 noon?
Answers
Answer:
The car is going 60 miles per hour✔✔
Explanation:
Reasoning:
9:30 AM to 12:00 PM is a difference of 2.5 hours (or 2 hours and 30 minutes). The equation to find MPH is D(distance) / T(time). Therefore, 140/2.5 = 56. Hope this helps!
I know it's in the wrong subject but I still need help ASAP save me
Louis Pasteur (December 27, 1822 – September 28, 1895) was a French chemist and microbiologist. Pasteur was familiar with Redi’s work and was fascinated by the idea that covering meat could protect it from growing maggots or other organisms that could cause disease. Pasteur devised the process of pasteurization, which is the process of heating liquids to kill bacteria and other germs that may be present. This process is still widely used today to make sure that many of the liquids we drink are safe, such as milk and juice. There are other pasteurized foods too, like syrups, vinegar, and cheese.
So how did Pasteur disprove spontaneous generation? Pasteur used a special flask to show that sterile broth will remain sterile unless exposed to the environment.
Pasteur used a special flask to demonstrate that heating a liquid kills bacteria. His experiments also showed that the broth would stay clear if the bacteria were trapped in the flask’s neck. If he broke the neck off the flask, the broth was soon full of bacteria.
Pasteur put clear meat broth into a flask with a curved neck. The shape of the flask allowed air to enter but kept out bacteria. He heated the flask to boiling and let it sit for several days.
When he returned, the broth was still clear because the bacteria were trapped in the neck of the flask. Then, he went one step further: he broke the neck off the flask, exposing the broth to air. A few days later, the broth was cloudy! Pasteur concluded that bacteria cannot suddenly arise from the broth. Bacteria can only be produced from living bacteria. Life comes from life!
The experiments by Redi and Pastuer helped to convince people that spontaneous generation was not based on fact, that life must exist first to reproduce and create more life.
Describe Pasteur’s results and how they helped disprove spontaneous generation.
Answers
its to hard but you can answer this
i need help w/ both so plz help
Answers
Answer:
6,000 years, Erosion
Explanation:
Thats what i gathered i didnt have enough information
The absolute age of a rock is the aproxímate number of years ago that the rock formed the absolute age of ingenious rock can best be determined by
Answers
Answer: comparing the amount of decayed and undecayed isotopes
Explanation:
The absolute age of the ingenious rock can be best determined by radiometric dating, which analyzes the amount of two different isotopes in the sample.
How absolute age of ingenious rock be determined?Radiometric dating, which analyzes the amount of two different isotopes in a sample, is utilized to determine the age of rocks. Radioactive isotopes decay in a predictable way, enabling geologists to determine the age of a sample.
Using equipment such as this thermal ionization spectrometry. It can be determined by examining the position of rock strata. The absolute age of a stratum of rocks or fossils is its numeric age.
Radiometric dating can be employed to establish absolute age, the ingenious rock having aged years ago to determine absolute age.
Therefore absolute age of the ingenious rock is determined by radiometric dating, having different isotopes in the sample.
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PLEASE HELP: Which of the following specialized structures help a bird maintain a constant body temperature?
A. Hard beaks
B. Edoskelteons
C. Watertight eggs
D. Feathers
Answers
Answer:
D. Feathers
Explanation:
The feathers help the bird hold and maintain a constant body temperature. When they fluff up their feathers it allows air to get inside and heat them up. (I would know I have a pet parrot myself) I hope this helps.
please answer for me
Answers
This is because chemical change occurs when the (for a lack of better wording) interior of the object is changed in the second one the bread is being broken down chemically by the stomach acid this is because the acid is breaking down the formation of the bread dissolving it and chainring it into something else.
In the 4th one the change that is seen is chemical because the formation of the roof is change the physical appearance may be the same (ie. The size & shape) but their are other changes in the color, texture and maybe taste ( don’t taste a rusting roof lol) these are ways in which you can figure out if a change is chemical or physical.
Physical change occurs when the size and/or shape of an object is changed.
Chemical change occurs when the texture, taste and/or color of the object is changed, but-sometimes chemical change cannot be seen.
Hope this helped :)
Question 9 (ID=3246988)
The Zooplankton in this food chain get their energy from consuming the -
A: shrimps
B: algae
C: damselfish
D: barracuda
Answers
Answer:
b:algae
Explanation:
its obvious.....look at the diagram
Answer:
b: algae
Explanation:
A school bus travels 12 kilometers in .75 hours. What is the speed of the school bus?
Answers
Answer:
20km/hr
Explanation:
