Geologic Time Scale

Time Period Duration (Millions of Years ago)

Cenozoic 66-0

Mesozoic 252-66

Paleozoic 541-252

Trilobites appeared approximately 521 years ago and disappeared approximately 250 million years ago. During which era did the trilobites live?

a
Cenozoic
b
Mesozoic
c
Paleozoic
d
None of These

Answers

Answer 1

Answer:

C. Paleozoic

Explanation:

Trilobites are a group of extinct marine arthropods. Just like many animals from today, including crustaceans, spiders, and insects, they belonged to the phylum Arthropoda. They lived in the Paleozoic era.

We can make this conclusion based on the fact that the period they existed in (from 521 to 250 million years ago) mostly fits the period described as Paleozoic (from 541 to 252 million years ago). However, we can see that they went extinct in the Mesozoic (250 million years ago is more than 252 million years ago). Compared to the entire time they existed, 2 million years is a relatively small amount of time, which makes Paleozoic the correct option.


Related Questions

Which of the Following brings material to the cell?

Answers

Answer:

Endocytosis

Explanation:

Endocytosis brings molecules into the cell. These molecules are important for the survival of the cell, such as glucose.

It is endocytosis. It’s type of active transport:)

Name an external stimulus that would cause a dog to fight. Explain why this stimulus would cause the dog to fight.
-easy question, basically giving out points

Answers

Answer:

the correct answer would be fight or flight i believe

Explanation: so sorry if im wrong <3

What is the purpose of the sodium potassium pump

Answers

purpose

Explanation:

The concentration gradients. It moves two potassium ions into the cell where potassium levels are high, and pumps three sodium ions out of the cell and into the extracellular fluid.

How does interphase prepare cells for mitosis?

Answers

Answer:

Growth of cell and replication of DNA

Explanation:

[tex] \large{ \underline{ \bf{Interphase}}}[/tex]

It is a long, non-dividing, growing phase of the cell cycle, where the cell prepares itself for division.It represents the most active stage of the cell cycle where both cell growth and DNA replication occur in an orderly manner.It is the period of intense growth and synthesis in which a cell stocks all the biomolecules required during cell division.It is called the resting phase because there is no apparent activity related to cell division rather, it deals with the changes that occur in a cell and the nucleus, before it enters into cell division.

NEED ASAP BRAINLY FOR FASTEST CORRECT ANSWER

What is the carbohydrate content of each category?

Answers

Answer:

C O2 this is the answer C O2

Explanation:

Hope this helped

Answer:

Carbohydrates are divided into four types: monosaccharides, disaccharides, oligosaccharides, and polysaccharides.

Explanation:

Which plate tectonics setting is creating each of these: the Rocky Mountains, the Cascades and the Basin and Range?

Answers

During the Cenozoic, the crust that had once been joined as Pangaea has mostly been moving apart. Subduction of the Farallon plate has resulted in the formation of the Rocky Mountains and the San Andreas Fault.

the number of consumer can never exceed the number of producer in nature why​

Answers

Answer:

The number of consumer can never exceed the number of producer in nature because there is a limited amount of producer in the nature so the consumers is the one who eats a producer !

When the number of consumers increases, producers disappear due to overconsumption and consumers disappear due to lack of food and the ecosystem is destroyed. Therefore, in nature the number of consumers can never exceed the number of producers.

What are Producers and Consumers?

Producers are plants that make their own food, the energy they need to grow, reproduce, and survive. They are making their own food which makes them special. These are the only living things on Earth that can make their own source of food energy with the help of sunlight, water and air.

Consumers make up the upper trophic level. Unlike producers, they cannot make their own food. They obtain their food by eating plants or other animals, while some eat both.

Scientists distinguish between several types of consumers. Primary consumers form the second trophic level.

Thus, when the number of consumers increases, producers disappear due to overconsumption and consumers disappear due to lack of food and the ecosystem is destroyed. Therefore, in nature the number of consumers can never exceed the number of producers.

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A biologist was given a sample of an unknown organic macromolecule and 4 points
asked to determine the class of organic macromolecules to which it
belonged. The chart shown below represents the results of the biologist's
analysis of the sample. Based on these results, to which class of organic
macromolecules did this sample belong?*
Element
С
H
Number of Atoms per
molecule
6
12
6
0
0
0
K
N
P
Protein
O Carbohydrates
Lipids
0 Nucleic Acid

Answers

Answer:

Carbohydrates

Explanation:

Glucose is an organic molecule made up of carbon, hydrogen and oxygen. This simple sugar has the formula C6H12O6 - 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms and is used as an essential means of obtaining chemical energy through various forms of respiration.

Polysaccharides are long chain carbohydrates. These are formed from the sugar monomer glucose, in its ringed formation. The successive molecules form 1,4-glycosidic bonds.

Effects of hurricanes

Answers

Answer:

Storm surge, tornadoes, heavy rainfall, high winds, riptide, and death are the most major effects of hurricanes. While a hurricane is approaching the coast, the sea level increases swiftly. Since the sea level rises, the amount of water can cause many deaths from drowning.

Explanation:

mark BRAINLIST

thx

Answer: They Produce strong winds and storm surge flooding,heavy rain fall that can result house and buildings flooding,and rip currents and it can also cause Tornadoes.

Identify the structure labeled X in the diagram

Amino acid

rRNA

Codon

Anticodon

Answers

Answer:

amino acid

Explanation:

each tRNA carries a amino acid at the top

The answer is Amino Acid

Define homeostasis. Explain how the human body would respond to having a higher than normal level of sugar in the bloodstream.
-easy question basically giving out points

Answers

Answer

Homeostasis means balance. As well as MAINTAINING balance within the organism.

The body would spike it’s insulin. When blood sugar levels drop, the pancreas releases glucagon to raise them. This balance helps provide sufficient energy to the cells while preventing the nerve damage that can result from consistently high levels of blood sugar.

Brainliest? :)

Answer:

The body would spike it’s insulin. When blood sugar levels drop, the pancreas releases glucagon to raise them. This balance helps provide sufficient energy to the cells while preventing the nerve damage that can result from consistently high levels of blood sugar.

scientists use tissue cultures to study possible medicines that can be used to treat cancer patient what is one benefit of this procedure ​

Answers

Answer:patients do not receive harmful or ineffective medication.

Explanation:

Got it off quizlet

Adenine, thymine, cytosine and guanine are ___________________ instructions to cells.

Answers

DNA is essentially a storage molecule. It contains all of the instructions a cell needs to sustain itself. These instructions are found within genes, which are sections of DNA made up of specific sequences of nucleotides. In order to be implemented, the instructions contained within genes must be expressed, or copied into a form that can be used by cells to produce the proteins needed to support life.

The instructions stored within DNA are read and processed by a cell in two steps: transcription and translation. Each of these steps is a separate biochemical process involving multiple molecules. During transcription, a portion of the cell's DNA serves as a template for creation of an RNA molecule. (RNA, or ribonucleic acid, is chemically similar to DNA, except for three main differences described later on in this concept page.) In some cases, the newly created RNA molecule is itself a finished product, and it serves an important function within the cell. In other cases, the RNA molecule carries messages from the DNA to other parts of the cell for processing. Most often, this information is used to manufacture proteins. The specific type of RNA that carries the information stored in DNA to other areas of the cell is called messenger RNA, or mRNA.

How does transcription proceed?

Transcription begins when an enzyme called RNA polymerase attaches to the DNA template strand and begins assembling a new chain of nucleotides to produce a complementary RNA strand. There are multiple types of types of RNA. In eukaryotes, there are multiple types of RNA polymerase which make the various types of RNA. In prokaryotes, a single RNA polymerase makes all types of RNA. Generally speaking, polymerases are large enzymes that work together with a number of other specialized cell proteins. These cell proteins, called transcription factors, help determine which DNA sequences should be transcribed and precisely when the transcription process should occur.

How can the shape of an object be changed without causing a chemical
change?
O A. Evaporating
O B. Chopping
O C. Rusting
O D. Burning
please help, i’ll mark brainliest if you get it right! please please only answer if you know the answer though, don’t guess i’m taking a test and i can’t fail as it’s the last one before the quarter ends ( tomorrow ) id appreciate it!! thank youuu

Answers

B. chopping. it does not cause a chemical change only physical.

Answer:

I belive it is evaporation, and chopping.

Explanation:

Not 100% sure but hope that helps

Type the correct answer in the box. Spell all words correctly.

What should Mohammed do after photographing a processed latent fingerprint?

Mohammed used an enhancement technique that made a fingerprint visible on a lamp. He photographed the print. Mohammed should now [____] the print from the surface to preserve it.​

Answers

Answer:

Mohammed should now lift the print from the surface to preserve it

Explanation:

In order to preserve fingerprint evidence as required by crime laboratory policies and criminal justice systems, for which we have digital photography, casting material, and latent print lifts, that can be used as secondary evidence

The ridges on the cast and lift can be photographed to serve as an additional secondary evidence

The  processing of the latent print after photographing is dependent on the surface type and may include the creation of an impression on soap, paint, wax, clay or dust

Therefore, Mohammed used an enhancement technique that made a fingerprint visible on a lamp. He photographed the print. Mohammed should now lift the print from the surface to preserve it

Answer:

Lift

Explanation:

How does a pond form?

A mudflow blocks a river.
Water collects in a low-lying area.
Humans use a dam to create a reservoir.
A depression made by an ice sheet fills with water.

Answers

Answer:r

the answer is B water collects in a low-lying area

Explanation:

Water gathers in hollows and low-lying regions of the ground, creating ponds and lakes. Therefore, option (B) is correct.

What is a pond?

A space containing artificial or natural water that is smaller than a lake is called a pond. To separate their ecology from that of lakes and wetlands, they are defined as being smaller than 5 hectares in size, less than 5 metres deep, and having less than 30% emergent vegetation.

Water gathers in hollows and low-lying regions of the ground, creating ponds and lakes. They are a kind of shallow standing water where light may reach the sediments at the bottom and may promote the establishment of rooted plants all throughout the water body.

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A couple just brought home their new baby from the hospital. They begin to suspect that the hospital switched babies, and the baby they brought home is not theirs. They check the hospital records, and findthat the man’s blood type is B, the woman’s blood type is AB, and the baby’s blood type is O. Explainwhy the parents are or are not justified in theirconcern about this babyRequired to answer. Single line text.

Answers

Answer:

Explanation:

the baby is not theirs because the father has a blood type of OB so he can give an O or a B and the mother has a blood type AB so she can give either an A or a B so their child could either be of blood type A or B or AB but not O

Photosynthesis converts solar energy into what type of energy?
A. Electron energy
B. Water energy
C. Photon energy
D. Chemical energy

Answers

Answer:

chemical energy

Explanation:

Photosynthesis is considered to be an essential biological process by which photosynthetic organisms convert solar energy into ATP and NADPH required for carbon dioxide fixation [56].

A carbohydrate that makes up the cell walls of plants:

Answers

Answer:

cellulose

Explanation:

Today, the common type of banana we eat is a Cavendish banana. They arose from chance mutants that were produced sexually from wild banana plants. The Cavendish banana is infertile and can only be produced by cloning root shoots. Large commercial growers worldwide now plant only the mutant type. Some information about both types of banana is recorded in the table.
Growers on large banana plantations that supply food commercially have chosen to limit their plantings exclusively to Cavendish banana plants. Why are scientists warning that exclusively growing this mutant type by asexual reproduction presents a serious disadvantage

1.The loss of an adequate Cavendish banana seed supply could result in extinction of both varieties of plants.


2. The changes in characteristics from a parent plant to a clone will produce inconsistent plants that are less healthy.


3.The lack of genetic variability among clones puts the whole species at increased risk of extinction through a catastrophic disease or pest.


4.The increasing number of homologous sets of chromosomes crossing over with each successive generation of clones will eventually result in widespread death of banana plants.

Answers

Answer:

The lack of genetic variability among clones puts the whole species at increased risk of extinction through a catastrophic disease or pest.

Explanation:

Every living organism, be it a plant or an animal, has its own way of reproduction and its own mechanisms of how to cope with dangers. In recent times though, we see that there are more and more organisms, mostly plants, that are not fertile, thus they can not reproduce on their own but need human assistance. This is the case with one of the most popular fruits in the world, the banana.

Virtually, all bananas that are produced commercially are not fertile, but they can only be reproduced by cloning them. While this may not seem like something that terrible, it actually is. Every single plant that is used for commercial production is exactly the same, thus the genetic variation is lacking totally. By having zero genetic variation, if only one plant gets diseased by a disease that spreads out easily and is fatal, it will affect every single banana plant, and by having no genetic variation, the effect will be the exact same at all of them. This kind of scenario can very easily lead to the rapid extinction of these bananas and the loss of one of the most consumed fruits in the world.

construct a written argument to support a claim about the relative
advantages and disadvantages of sexual (meiosis) and asexual reproduction (mitosis
and binary fission)

Answers

Answer:

Asexual reproduction has an increased chance of genetic diseases and low genetic diversity, but only requires one parent. Sexual reproduction requires a male and female, but leads to higher genetic variation and less genetic diseases.

DUE IN 5 MINUTES
Which of the following types of energy is re-radiated from the Earth’s surface?
ultraviolet
infrared
microwaves
cosmic rays
gamma rays

Answers

Answer:

Infared

Explanation:

We absorbe light aka infrared radiation and re radiate it in the form of heat.

Infrared i remeber from when I did science

Please help me :((
Please answer A , B, and c

Answers

a) carbon is the essential component of macromolecules, counting proteins, lipids, nucleic acids, & carbohydrates. carbon’s atomic structure permits it to bond in numerous diverse ways & with numerous distinctive components. the carbon cycle appears how carbon moves through the living & non-living parts of the environment.

b) the major component of cell membranes are lipids. they have two groups attached to them which are called “hydrophobic fatty acid tails” & “hydrophilic head”. B cells are called lymphocytic cells which provide immunity by secreting antibodies. cancer cells are cells which continuously repeat itself to form a tumor structure. when the polar parts interact hydrophobic tails are lined up with one another. they form a membrane which diffuses creating a membrane of hydrophilic head on two sides facing water. this a brief explanation of how polar & the nonpolar parts combine are explained.

What is a type of cell that would contain many ATP molecules?

Answers

Answer:

Just as the chloroplasts in plants act as sugar factories for the supply of ordered molecules to the plant, the mitochondria in animals and plants act to produce the ordered ATP molecules as the energy supply for the processes of life. A typical animal cell will have on the order of 1000 to 2000 mitochondria.

Explanation:

The study of a cell is called cell biology.

The correct answer is mitochondria.

The cell is made up of various organelles which perform different functions. For example:-

Chloroplast - help in making food.Ribosome- help in making protein.

The mitochondria are also known as the powerhouse of cells due to the production of ATP with the help of oxysome.

These ATP molecules are present and stored in the mitochondria.

Hence, the correct answer is mitochondria.

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Please help! Lot's of points and brainliest for answer!

Answers

Answer: the answer is one  

and plz brainliest

The answer is A Hope this helps!!

Prior Knowledge Questions (Do these BEFORE using the G
To survive, what gas do we need to breathe in?

Answers

Answer:

Oxygen

Explanation:

SOMEONE HELP ME PLEASE!!!!!
What happens between the two monosaccharides once water is removed?

Answers

Answer:

Dehydration synthesis is a chemical reaction that takes smaller, simpler molecules and combines them to form larger, more complex molecules with the removal of one WATER molecule. So, two monosaccharide (glucose) molecules come together and make a disaccharide (maltose).

Explanation:

difference between bat and dove​

Answers

Answer:

Explanation:

Bats are webbed structured flying animals while birds are feathered winged animals. Bats are mammals, so they don't lay eggs, compared to birds that are known as egg-laying animals. When flying, bats don't flap their forelimbs completely compared to birds.

A hypothesis is a(n) ______________, while a theory is a(n) ______________.
A. educated guess based on observations, set of tested hypothesis that explains why something happens
B. guess made after researching and experimenting, guess made before researching and experimenting
C. set of tested hypothesis that explains why something happens, educated guess based on observations.
D. guess made before researching and experimenting, guess made after researching and experimenting

Answers

Answer:

The answer is A. educated guess based on observations, set of tested hypothesis that explains why something happens.

A hypothesis is an educated guess based on observations, while a theory is a set of tested hypothesis that explains why something happens. The correct option is A.

What is a hypothesis?

A supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation is referred to as hypothesis.

A theory is a set of trailed hypothesis that explains why something happens, whereas, a hypothesis is an assumption based on observations.

Thus, the correct option is A.

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Which pair of nitrogenous bases will form a bond in a DNA molecule?

Answers

Answer:

Adenine and Thymine

Explanation:

Answer:

Adenine Thymine

Explanation:

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