Biochemical analysis uses similarities in __________ as evidence for evolutionary relationships. A)DNA sequences B)bone structure C)cellular architecture D)homologous structures

QUESTION POSTED AT 18/01/2020 - 06:04 AM

Answered by admin AT 18/01/2020 - 06:04 AM

The correct answer is (a.) DNA sequences. The biochemical analysis uses similarities in DNA sequences as evidence for evolutionary relationships. The biochemical analysis is the key component of drug discovery and research, with the use of DNA sequences; a process of determining the organized structure of nucleotides within a DNA molecule. 
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I need help with five multiple choice marine science questions. 1)When severe weather damages the plant life in an ecosystem, what effects might this have on other organisms in the same ecosystem? a)- Other organisms could starve or have to leave the area if they depend on the plants as food. b) -Other organisms could change their behavior to take the place of the plants in the ecosystem. c )-Other organisms would not be affected. d )-Other organisms could replace the plant energy with radiant energy from the sun. 2)As the climate changes, the average ocean temperature is rising. Using this information, predict what will most likely happen to El Niño events in the future. a)-El Niño events will intensify because they rely on warmer water sinking to the seafloor. b)-El Niño events will intensify because they will build on the already warm waters at the equator. c)-Some El Niño events will be stronger, but most will be weaker because the ocean currents are unpredictable. d)-El Niño events will become more similar to La Niña events and establish a new weather pattern. 3)Which of the following examples is the most likely way severe weather can negatively affect the biodiversity of a marine ecosystem? a)-A severe thunderstorm brings rain and wind to an intertidal zone. b)-A storm surge from a hurricane floods a coastal area. c)-A tornado causes a waterspout. d)-A blizzard adds snow and ice to an arctic glacier. 4)El Niño events are characterized by warmer than normal ocean temperatures near the equator in the Pacific Ocean. Which weather events are most likely to occur as a result? a)- Increased rainfall across the eastern Pacific Ocean b)-Decreased flooding across the eastern Pacific Ocean c)-Drought along the South American Pacific coastline d)-Colder winter along the South American Pacific coastline 5)According to the Severe Weather Activity worksheet, El Niño events most likely occurred during which of the following years? a)-2006 and 2015 b)-1997, 2006, and 2015 c)-1997 and 2015 d)-1997 and 2006

1. The answer is A. The eradication of plants in an ecosystem would devastate the food web in the habitat. This is because plants are primary producers and significant as conduits of energy into a food web. Plants convert radiant energy from the sun to biomass through photosynthesis. This energy then transferred up the food chain through various form of interaction such as predation.

2. The answer is B. Global warming causes water at the equator to be even warmer above normal temperatures. This fans the upwelling of cold water from below the ocean floor and causes an even greater disparity of temperatures across the Pacific ocean. This subsequently fans the trade winds hence warming the air even more and causing severe storms.

3. The answer is B. The flooding of the coastal area due to hurricanes destroys the biodiversity of the ecosystem by physically destroying the habitat and by drowning organisms such as affecting a whole species population. This upsets the balance of the ecosystem and makes it prone to even further deterioration.

4. The answer is A. When the surface ocean waters at the Pacific ocean warm at the equator, there is an upwelling of cooler ocean waters from the bottom of the ocean., The warm currents along with trade move towards the east and met the South American coastline where they bring in heavy rainfall. Conversely, the northwestern region of the Pacific experiences drought.

5. The answer is C. Elnino and La Nina occurs at a frequency of approximately two(2) to seven (7) years. The phenomenon usually lasts nine (9) to twelve (12) months. El Ninos are more frequent than La Ninas. Their peak effect is usually felt around December and January. The strongest El Nino was the one that occurred in 1997.

ANSWERED AT 16/02/2020 - 07:04 PM


QUESTION POSTED AT 16/02/2020 - 07:04 PM

1. Restriction enzymes are naturally occurring proteins genetically engineered proteins enzymes that cut proteins B then C A then C 2. Plasmids can be used to cut DNA can be used to insert DNA into bacteria can be used to digest proteins A and C All of the above 3. Name the technique used to increase a quantity of DNA. plastid technology genetic engineering PCR RNA Recombinant DNA technology 4. What tool does one use to separate DNA fragments? an electron microscope a cyclotron a mass spectrograph a Polyacrylamide gel a centrifuge (high speed) 5. DNA fragments hav 1. Restriction enzymes are naturally occurring proteins genetically engineered proteins enzymes that cut proteins B then C A then C 2. Plasmids can be used to cut DNA can be used to insert DNA into bacteria can be used to digest proteins A and C All of the above 3. Name the technique used to increase a quantity of DNA. plastid technology genetic engineering PCR RNA Recombinant DNA technology 4. What tool does one use to separate DNA fragments? an electron microscope a cyclotron a mass spectrograph a Polyacrylamide gel a centrifuge (high speed) 5. DNA fragments hav ...?

1. Restriction enzymes are

A then C

2. Plasmids

can be used to insert DNA into bacteria


3. Name the technique used to increase a quantity of DNA.

PCR


4. What tool does one use to separate DNA fragments?

a Polyacrylamide gel

Hope this answers the question. Have a nice day.

ANSWERED AT 16/02/2020 - 06:46 PM


QUESTION POSTED AT 16/02/2020 - 06:46 PM

Some biology students wanted to determine whether a pair of brown mice purchased at a pet store was homozygous dominant or heterozygous for fur color. They let the mice mate and examined the offspring. Six mice were born. All six had brown fur. Some of the students felt that this was enough evidence to prove that the mice were homozygous for brown fur color. Other students did not, so another experiment was planned. Describe the next experiment the students could conduct to determine whether the parent mice are homozygous brown or heterozygous. Explain your answer. ...?

Mark me brainiest answer is b

How does natural selection change the frequency of genes or traits over many generations? Biology students conducted an experiment mimicking genetic variation and coloration. Students used different colored beans to represent animals that might be prey: mice, for example. A student in each group was the predator: a hawk. Beans (mice) were randomly scattered on multicolored floor tiles, each color within four tiles. The hawk collected mice (beans) for 10 seconds. Mice not eaten reproduced. Three generations of data a shown in the table.

 Speckled and striped beans (mice) had the best survival rates. Why?

A) They reproduced very rapidly.  

B) Coloration was a form of camouflage.  

C) They mimicked other mice and were spared.  

D) The speckled and striped beans had a wider range.  

ANSWERED AT 16/02/2020 - 06:37 PM


QUESTION POSTED AT 16/02/2020 - 06:37 PM

A.) List one organism classified in kingdom Animalia and one organism classified in kingdom Fungi b.) Describe two similarities between the two organisms. c.) Describe two differences between the two organisms. ...?

A. Kingdom Animalia: Dogs
    Kingdom Fungi     : Molds
B. Both dogs and molds are eukaryotic- multicellular and do not produce their own food.
C. They have different structures when it comes to physical appearance.The major difference between them is their ability to move - animals are capable of free movement while fungi yes they can but not as much as the animals.

ANSWERED AT 16/02/2020 - 06:34 PM


QUESTION POSTED AT 16/02/2020 - 06:34 PM

Which structure of the respiratory system plays the main role in carry out the system’s primary function? trachea pharynx alveoli nose

Answer:

alveoli

Explanation:

Alveoli are the basic functional units of respiratory system which play actual role of exchange of gases. Alveoli are tiny balloon like air sacs which exist as a single cell not as a group of cells. They are responsible for exchange of gases like oxygen and carbon dioxide in our body. As soon as we inhale with the help of nose, a lot of air full of oxygen first reaches pharynx and then trachea. From trachea it ultimately reaches alveoli. Since alveoli have air full of oxygen so the partial pressure is more at alveolar end while capillaries nearby alveoli have blood which is full of carbon dioxide so the partial pressure of carbon dioxide is more in capillaries. Now, a gradient is set up as a result of which alveoli and blood capillaries exchange oxygen and carbon dioxide passively. Oxygen molecules from alveoli tend to diffuse to capillaries while carbon dioxide molecules from capillaries tend to move towards alveoli. The movement/exchange of gases continues until an equilibrium condition is reached. After which the carbon dioxide is exhaled out of out body with the help of same respiratory tract mentioned above.

ANSWERED AT 16/02/2020 - 05:14 PM


QUESTION POSTED AT 16/02/2020 - 05:14 PM

Which two scientists worked together to develop a three-dimensional model of DNA?

James Watson, Francis Crick.

Developed the three dimensional model of the atom although there aids or assistance, Maurice Wilkins, and Rosalind Franklin And most forgotten Elizabeth Sheppard helped them gain the knowledge to make the atom model in the first place Elizabeth shoe gave them the motivation 


ANSWERED AT 16/02/2020 - 03:47 PM


QUESTION POSTED AT 16/02/2020 - 03:47 PM

On a cloudless night a milky band known as a milky way is visible from earth.Explain how the structure of our galaxy and the position of our solar system within our galaxy relate to this observation

Since we are at the edge of the galaxy, The side of the milky way is visible to us.  However you have to be very far from artificial light.

ANSWERED AT 16/02/2020 - 02:01 AM


QUESTION POSTED AT 16/02/2020 - 02:01 AM

PLZZ HELP FASSSSST 1. Which of the following eyects would you expect if red blood cells were shaped like neurons? (1 point) They would not be able to move as easily through capillaries. They would more easily carry out gas exchange in the alveoli. They would not need to be transported through the body. They would become more eyective at picking up urea discarded by body cells. 2. Which of the following is not a function of the skeletal system? (1 point) supports the body works with other body systems to allow movement manufactures new blood cells sends signals to the brain 3. Which of the following body systems are involved in the first line of defense of the immune system against infection? (1 point) integumentary, digestive, respiratory nervous, circulatory, skeletal muscular, endocrine, urinary urinary, skeletal, integumentary 4. Which of the following sets of structures would be involved in ridding the body of unwanted urea? (1 point) sensory neuron, interneuron, spinal cord alveoli, atrium, cilia capillary, nephron, ureter brain, esophagus, small intestine 5. An infectious disease is a disease that (1 point) is caught because the weather turns cold. is caused by pathogens. can be spread only by bacteria. cannot be cured. 6. Which of the following statements is true regarding infectious agents? (1 point) Infectious agents are all too small to be seen without a microscope, and none can be classified as living. All infectious agents are living because they are all classified as microorganisms. Of all the infectious agents, only viruses are considered living because they actively inject their DNA or RNA into host cells. Viruses cannot be treated with antibiotics because they are not living organisms. 7. Which discovery in the 1800s led to the development of germ theory? (1 point) Vaccines could prevent a disease. Antibiotics exist that can be given to counteract an infection. Infection rates decline when health care professionals wash their hands in between seeing patients. Some diseases, such as cancer, are caused by chemical factors. 8. Follow a carbon atom in a piece of bread eaten by a boy. Which of the following describes a path that this atom could take? (1 point) mouth esophagus stomach large intestine blood body cell mouth esophagus stomach small intestine blood body cell mouth large intestine esophagus stomach blood body cell mouth esophagus small intestine stomach blood body cell 9. Which of the following sets of structures is innervated by the somatic nervous system? (1 point) esophagus, stomach, small intestine atrium, ventricle, arteries biceps, triceps, quadriceps diaphragm, bladder, large intestine 10. Which of the following cell types would you expect to increase in number azer a person becomes infected with a pathogen? (1 point) sensory neurons white blood cells epidermal cells red blood cells

I got the first 3 the answers are A,D, and C good luck with the rest

ANSWERED AT 16/02/2020 - 12:10 AM


QUESTION POSTED AT 16/02/2020 - 12:10 AM

During ________, a ribosome assembles a polypeptide whose amino acid sequence is specified by the nucleotide sequence in a molecule of mrna.

This phase would be the translation, during which mRNA is translated into a sequence of amino acids, a polypeptide.

ANSWERED AT 14/02/2020 - 04:00 PM


QUESTION POSTED AT 14/02/2020 - 04:00 PM

In figure 34-1 structure F produces which of the following hormones when you're feeling stress about a big test

In figure 34-1 structure F produces  the following hormones released when you're feeling stress about a big test is
epinephrine 
It is also known as adrenalin or adrenaline secreted mainly by the medulla of the adrenal glands
hope it helps

ANSWERED AT 14/02/2020 - 02:56 PM


QUESTION POSTED AT 14/02/2020 - 02:56 PM

How does rough er differ from smooth er in structure and function

Rough ER is called rough because it has ribosomes attached to its surface. The double membranes of smooth and rough ER form sacs called cisternae. Protein molecules are synthesized and collected in the cisternal space/lumen. When enough proteins have been synthesized, they collect and are pinched off in vesicles.

ANSWERED AT 14/02/2020 - 01:52 PM


QUESTION POSTED AT 14/02/2020 - 01:52 PM

Describe one way in which neurons are similar to other cells in the body and one way in which they are different.

The way in which neurons are similar to other cells in the body : as well as cells, neurons have cell membrane, cytoplasm, nucleus, organelles and almost all the component tha cells have. It also performs energy production which is refers to similarities. 

Do hope it will help you! Regards.

ANSWERED AT 14/02/2020 - 09:46 AM


QUESTION POSTED AT 14/02/2020 - 09:46 AM

The cell theory is one of the basic principles of biology and refers to the idea that cells are the basic unit of structure in every living thing. which of the following statements are not true about cells?

The "Cell Theory" Is Not one of the basic principles of biology. However, Cells are the basic building blocks or life.

ANSWERED AT 13/02/2020 - 11:03 AM


QUESTION POSTED AT 13/02/2020 - 11:03 AM

With what does the synthesis of a new strand of dna begin with

Following the initiation of DNA replication, the first step is the synthesis of a short RNA primer.

ANSWERED AT 12/02/2020 - 03:30 PM


QUESTION POSTED AT 12/02/2020 - 03:30 PM

Which rna base pairs with the adenine in dna??

Answer:

In RNA Adenine bonds to Uracil

Explanation:

In the transcription a ribonucleic acid (RNA) copy of a DNA (deoxyribonucleic acid) molecule is made.

During transcription of DNA, RNA uses the uracil base, it bonds with the adenine DNA nucleotide. Thymine is not used as a base in any RNA nucleotide. Thymine and Uracil are identical ring structures but there is a methyl group on thymine and uracil contains a hydrogen atom.

ANSWERED AT 12/02/2020 - 02:50 PM


QUESTION POSTED AT 12/02/2020 - 02:50 PM

HELP PLEASE I'M BEGGING YOU I CAN'T FIND THE ANSWERS1. Stems cannot grow underground True or False 2. The cell division process that allows two different organisms to contribute DNA to am offspring is known as A. Osmosis B. Mitosis C.Meiosis D. RNA. 3. All of the following are important considerations when planting turfgrass EXCEPT A.climate B. its appearance C. the nutrition it provides livestock D. whether or not a lot of people will be walking on it 4. The danger of crops becoming extinct before scientists can study them is A. future scientists will not have jobs B. only scientists fully understand how useful plants can be C. opportunities for improved crops or new medications will be lost D. siientists have not yet developed effective classification standards for plants 5. trees require regularly trimming because A. it protects them from harmful insects B. without it roots will continue to expand indefinitely C. it prevents them from becoming too heavy and falling over D. it generates additional revenue for landscaping industry 6.Deductive reasoning does not need to consider variables True or False 7. Joe leaves for work and arrives there 35 minutes later. therefore, it takes Joe 35 minutes to get to work in the morning. this is an example of A.deductive reasoning B. inductive reasoning C. systems thinking D. abstract theory 8. Critical thinking skills are highly desired by employers True or False 9. Systems thinking is especially important in agriculture and agriscience because A.agriculture is like family B. Its important in science in general C. natural resources are in tolerated D.those in agriculture create the systemsvthey work with 10. Plants with fibrous roots are better for the environment for the environment than those with taproots for all of the following reasons EXCEPT A. fibrous roots help prevent soil erosion B.fibrous roots need more water than taproots C. fibrous roots are more likely to put nutrients back in the soil than taproots D. fibrous roots are very effective in getting nutrients from the soil to the plant 11. If a plant is not getting a nutrient, it means that nutrient is not in the soil True or false 12.Environmental concerns like light and water are not as important for indoor plants as they are for outdoor plants True or False 13. If knowledge is knowing what happened , then critical thinking is knowing A. why it happened B. when it happened C. where it happened D. whether it happened 14.How many nutrients do plants need to thrive 6 7 9 16 15. In plants the process of osmosis is important for A. reproduction B.absorbing oxygen and releasing nitrogen C.transferring energy into glucose D. acquiring water and water-born nutrients

Answer:

6. Deductive reasoning does not need to consider variables

-False

10. Plants with fibrous roots are better for the environment for the environment than those with taproots for all of the following reasons EXCEPT

-Fibrous roots need more water than taproots.

14. How many nutrients do plants need to thrive

-16

Explanation:

I just took the test. Everything else was correct.

ANSWERED AT 12/02/2020 - 11:34 AM


QUESTION POSTED AT 12/02/2020 - 11:34 AM

What percentage of our DNA is the same as a mouse?

About 90% of our DNA is the same.

ANSWERED AT 12/02/2020 - 10:53 AM


QUESTION POSTED AT 12/02/2020 - 10:53 AM

What is the relationship of photosynthesis to chloroplast?

Photosynthesis takes place in chloroplast.

ANSWERED AT 12/02/2020 - 09:22 AM


QUESTION POSTED AT 12/02/2020 - 09:22 AM

What does the structure of the cell and how they are put together tell you about their role in the organism?

Depending on the organelles present and the unique features can give clues about the function, for example, muscle cells contain higher concentrations of mitochondria

ANSWERED AT 11/02/2020 - 02:32 PM


QUESTION POSTED AT 11/02/2020 - 02:32 PM

Which of the following pairs of structures are an example of homologous structures

Well, a homologous structure is a bone or something else that is present in many different species that could point to a common ancestor. Since you do not have the examples in your question I will just give you some and hope that it helps you: 
The arm of a human, the wing of a bird or a bat, the leg of a dog and the flipper of a dolphin or whale. 

I hope this helped! Let me know if it did not! 
I hope you have a fantastical day!!XD

ANSWERED AT 10/02/2020 - 11:54 PM


QUESTION POSTED AT 10/02/2020 - 11:54 PM

What a vestigial structure? How does it support evolution?

A vestigial structure is a structure that kind-of just "hangs out" in our bodies. We don't really need it, yet it is there. So, why is it there??? We probably needed it, for example, when we needed to digest plants. (Appendix) Some say that the appendix was used for digesting plants and berries, but it is really just speculation. We "evolved" to not need the appendix. 
Here are some other vestigial examples: wisdom teeth, tail bone, pelvic bone in a snake, and wings on a flightless bird. 
I hope this helped, if it did not let me know!!
I hope you have a fantastical day!!!XD

ANSWERED AT 10/02/2020 - 02:21 PM


QUESTION POSTED AT 10/02/2020 - 02:21 PM

In what ways are mitochondria and chloroplasts similar to some prokaryotic cells?

Mitochondria and chloroplasts are similar to some prokaryotic cells because they contain their own amino acids which are not organised into sets of linear chromosomes or contained within a nucleus.

ANSWERED AT 10/02/2020 - 02:11 PM


QUESTION POSTED AT 10/02/2020 - 02:11 PM

How is DNA used to solve crimes?

DNA can narrow down a Investigation to the person who was last there, Makes it easier in a way to narrow down the search for who they are looking for, cannot come to a conclusion on who that person may be because it could have been from someone the day before, or it could have been from someone else that was there for house keeping or a friend etc.

ANSWERED AT 10/02/2020 - 01:44 PM


QUESTION POSTED AT 10/02/2020 - 01:44 PM

One gene controls the synthesis of one _____. peptide polypeptide DNA molecule

Answer:

One gene controls the synthesis of one polypeptide.

Explanation:

The concept of one gene-one enzyme was given by Beadle and Tatum. This concept states that a gene codes only for a single enzyme. The enzyme affects the metabolic pathway of the reaction.

The enzymes are the proteins which performs a metabolic function. The protein is made up of amino acids. The amino acids are joined together to form a  linear chain. This linear chain is also called as a polypeptide.

ANSWERED AT 09/02/2020 - 08:00 PM


QUESTION POSTED AT 09/02/2020 - 08:00 PM