Answer:
When there is a mistake in the copying of the genetic message that is permanent, a mutation has occurred. Two of the bases in DNA (Cytosine and Thymine) are the most vulnerable, and when this happens, they may pair with each other or themselves and the message is changed.
Explanation:
hope this helps you
What are the substances?
Explanation:
Hi I need help in those two questions please don't type something that doesn't make sense for the points and have a good day
Answer:
enterocytes, Paneth cells, goblet cells, and neuroendocrine cells / Gastroesophageal Reflux Disease / Antacids, Histamine blockers, Proton pump inhibitors, and Prokinetic agents. / from the mouth to the anus / yes, the liver
one pore cell, one duct cell, one canal cell, and a fused pair of gland cells / Uremia / renal replacement therapy by hemodialysis, peritoneal dialysis, or kidney transplantation / kidneys and bladder / yes, the kidney
cilia cells, goblet cells, and basal cells / Asthma / Antileukotrienes or leukotriene modifiers, Cromolyn sodium, Inhaled corticosteroids, Long-acting inhaled beta2-agonists, Methylxanthines, Oral corticosteroids, and Immunomodulators / starts at the nose and mouth and continues through the airways and the lungs / yes, the lungs
Explanation:
1-7 please i really need help
Viruses vary in size and structure, but what is one thing they have in common?
a. they destroy the host cell
b. they all cause terminal illness
c. they all hijack a host cell
d. none of the above
Think of some examples of competition among organisms. What are some things they would need to compete over?
Answer:
Organisms compete for the resources they need to survive- air, water, food, and space. In areas where these are sufficient, organisms live in comfortable co-existence, and in areas where resources are abundant, the ecosystem boasts high species richness (diversity).
Explanation:
Answer:
They would need to compete over space, water, food, resources.
Explanation:
Which of the following is correct about classifying organisms in science?
A
They are classified in a hierarchical system, with the largest group sharing only a few characteristics at the top, and the smallest group sharing the most characteristics at the bottom.
B
They are classified in a numerical system, where the top tier classifies organisms with the largest populations, and the lowest tier classifies organisms with the smallest populations.
C
They are classified in a chronological system, starting with the first organisms discovered by people and through to the most recently discovered organisms.
D
They are classified in a geographical system, where the organisms are listed alphabetically by country, and the countries are ordered by number of organisms they possess.
It aids in both the identification of living things and the comprehension of their diversity. We may learn about the characteristics, similarities, and differences of many plant and animal species thanks to classification. Thus, option C is correct.
What classifying organisms in science?The study of relationships among living things is known as taxonomy, and the formal classification of species into groups based on those supposed relationships is known as taxonomy. The similarities and differences between organisms are used to classify them.
Scientists classify things using a branching method. The domain is the largest category. Kingdoms are the next level of division within each domain, followed by phyla, classes, orders, families, genus, and species. It helps us comprehend how more sophisticated organisms develop from less complicated ones.
Therefore, They are classified in a chronological system, starting with the first organisms discovered by people and through to the most recently discovered organisms.
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Which of these is not a principle of natural selection?
A. Over time, the offspring of individuals with helpful variations make up more of a population and eventually become a separate species
B. Variations are passed to offspring
C. Differences, or variations, occur among individuals of a species
D. Adaptations happen in a start stop fashion
Answer:
D
Explanation:
adaptations are passed down in natural selection but it’s not in start stop fashion
Answer:
D
Explanation:
Adaptations occur, but they don't just stop. In virtually every population, you will have variation, and therefore, adaptations. They aren't going anywhere.
;)
A: A bright, egg shaped form. B: Dust, gas, and stars in a nonuniform arrangement. C: Dust, gas, and stars in the shape of a pinwheel.
Use the drop-down menus to identify each type of galaxy pictured.
Galaxy A:
Galaxy B:
Galaxy C:
Answer:
Can't answer without drop-down menus
Explanation:
Please help. ASAP. I need an answer!! Ty.
Answer:
It is the varying chemical structure and properties of the R-group that make the amino acids different from one another. About 9 amino acids have non-polar R-groups and are relatively hydrophobic. Another 6 amino acids have strongly polar R-groups which readily attract water molecules.
how many parts to a virus?
Answer:I do know that it has dna and rna
Explanation:
Lets see if you can Answer this test!
Question 1(Multiple Choice Worth 4 points)
(06.01 HC)
Two methods of biotechnology used by scientists are described below.
Process A: Inserted a pesticide gene into a soybean
Process B: Used plants and microorganisms to create a new biofuel
Which process is likely to be more advantageous in conservation?
Process B because it will reduce our dependency on fossil fuels
Process A because it will increase the number of pests in the environment
Process B because it will cause an increase in fossil fuel pollution
Process A because more food will increase the global population
Question 2(Multiple Choice Worth 4 points)
(06.04 LC)
Which type of reproduction involves only one parent?
Asexual
Cytokinesis
Meiosis
Sexual
Question 3(Multiple Choice Worth 4 points)
(06.03 LC)
What tool is used to track inherited traits between parents and offspring?
Allelic pair
Family tree
Pedigree chart
Punnett square
Question 4(Multiple Choice Worth 4 points)
(06.02 LC)
Which of the following personal health conditions can be controlled by exercise and diet?
Heart disease
Sickle cell anemia
Skin cancer
Sunburn
Question 5(Multiple Choice Worth 4 points)
(06.02 MC)
Which of the following is true about the offspring of an organism Y that reproduces sexually?
The offspring would show all the traits of Y.
The offspring would be identical in size to Y.
The offspring would have identical DNA as Y.
The offspring would show some traits of the parent other than Y.
Question 6(Multiple Choice Worth 4 points)
(06.04 MC)
A few characteristics of a type of reproduction are shown below:
1. Occurs in all body cells
2. Two daughter cells are formed
3. Chromosomes arrange equally on either side of the equator
4. The daughter nuclei each have half the number of chromosomes as that of parent cells
5. Is necessary for sexual reproduction
Which of the above are characteristics of meiosis?
1, 2, and 3
1, 4, and 5
2, 3, and 4
3, 4, and 5
Question 7(Multiple Choice Worth 4 points)
(06.02 LC)
Which of the following hereditary conditions is characterized by abnormally shaped blood cells?
Acne
Heart disease
Sickle cell anemia
Type 1 diabetes
Question 8(Multiple Choice Worth 4 points)
(06.01 MC)
What is the likely advantage of growing a genetically modified variety of tomato that remains fresh over several days?
Post-harvest losses due to delayed transportation would be reduced.
Disease-causing pests may never be able to attack such a variety of tomato.
When consumed it would provide more nutrients than the regular variety.
When consumed it would improve the quality of life of people with genetic disorders.
Question 9(Multiple Choice Worth 4 points)
(06.01 HC)
A corn plant has been genetically engineered. It produces pollen that can make its own toxins. These toxins protect the corn plant against pests. What is a likely impact on the environment around the corn plant?
Bird and butterfly populations around the area may increase.
The concentration of pesticides in a nearby lake would increase.
Newer strains of pesticide-resistant pests may develop.
The carbon dioxide level would increase in the area.
Question 10(Multiple Choice Worth 4 points)
(06.04 MC)
Some steps in cell division are shown below:
1. Chromosomes condense and pair up
2. Segments of DNA of sister chromatids twist and cross
3. Exchange of DNA occurs between chromosomes
4. Four daughter cells are created that are haploid
Which of the following steps is least likely to occur during meiosis 1?
Step 1
Step 2
Step 3
Step 4
Question 11(Multiple Choice Worth 4 points)
(06.01 MC)
Which type of biotechnology would a dairy farmer use to mate the cows at his farm with genetically superior bulls to produce offspring that give high-quality milk?
Genetic engineering because the genes of the cows are altered
Genetic engineering because cows with desirable traits are produced
Artificial selection because offspring with desirable traits are produced
Artificial selection because the process reduces the production time of offspring
Question 12(Multiple Choice Worth 4 points)
(06.02 HC)
In fruit flies the allele for long wings (L) is dominant and the allele for short wings (l) is recessive. What is the likely genotype of a fruit fly with long wings?
Either LL or Ll
Either Ll or ll
Only LL
Only ll
Which organ releases the male hormone testosterone?
A. Hypothalamus
B. Ovary
C. Pancreas
D. Testicle
Answer:
D. Testicle
Explanation:
The testicle releases the male hormone testosterone.
Answer:
Testicle releases the male hormone testosterone
D) Testicle★・・・・・・★・・・・・・★
hope it helps...
have a great day!!
does go through cell cycle in
mitosis, meiosis, or both
PLS HELP OR ILL FAIL SCHOOL
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Answer:
I'm not sure about 13 and 19.
13. Traits?
14. Hagfish
15. No, it doesn't have jaws.
16. Mammary glands.
17. Jaws and lungs.
18. Lizard, bird, cow, lion.
19. The bird?
20. Claws/nails, lungs, and jaws.
Also, this is a cladogram, in case you needed the info. :)
Answer:
13. shared derived characteristic
14. Hagfish
15. No, it doesn't have jaws.
16. Mammary glands.
17. Jaws and lungs.
18. Lizard, bird, cow, lion.
19. the frog
20. Claws/nails, lungs, and jaws.
Explanation:
The table below shows the names of three body parts and the and the functions of two of them
A. Testes-Function 1: Ovaries-Function 2
B. Ovaries-Function 1; Testes-Function 2
C. Thymus-Function 1: Oraries-function 2
D. Oraries-Function 1; Thymus-Function 2
Answer:
D. ovaries: function 1 and thymus: function 2
The testes are responsible for making testosterone.
How would you explain to Dr. Jackie Lewis why the rock in the Great Plains and Rocky Mountains have similar mineral compositions.
NO LINKS PLS
Because of the soil the rocks are in. If They stayed in that soil for a while which affected the compounds, shifting the mineral composition.
What is Mineral composition?A mineral in a geological sense is not the same as the phrase "minerals" as used on nutrition labels and pharmaceutical items. The traditional definition of a mineral in geology is one that has the following criteria: 1) naturally occurring, 2) inorganic, 3) solid at room temperature, 4) regular crystal structure, and 5) specified chemical composition.
Although they technically shouldn't be classified minerals, several natural substances are. Mercury and water, for instance, are both liquid at ambient temperature.
Because both were categorized prior to the room-temperature rule being acknowledged as a component of the definition, they are both regarded as minerals.
Therefore, Because of the soil the rocks are in. If They stayed in that soil for a while which affected the compounds, shifting the mineral composition.
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Explain at least one way in which the quantity and quality of water resources have been affected by human population growth. Predict how you think the water supply will be affected by continued human population growth. Support your response with appropriate evidence and scientific reasoning.
Why do roots always grow in a downward direction, no matter which way you turn the seed or seedling?
because roots weigh more than any other plant part
because the plant’s stem begins to grow, and it pushes the roots downward
because that is the direction that roots find necessary water and nutrients
because the root contains hormones that make it grow away from the sun
How?
Water is clear and clouds are white, BUT clouds are made of water...
Answer:
I don't know
Explanation:
True/False: Animal viruses can only infect animal cells.
Can someone please answer these 4 questions. I’m begging you
PLSS HELPP PLS OR ILL FAIL SCHOOL
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you dont have to help with all even just one part is ok
other types of carbohydrates include starches and fiber are both made up of many sugar molecules. Do you think fiber and carbohydrates are attracted to water? Why or why not?
HELP ASAP
How does water help plants and animal cells to survive?
Animal use oxygen to produce water
Cytoplasm is made up largely of water
Chlorophylls is made up largely of water
Plants use oxygen to produce water
Answer:
B
Explanation:
Cytoplasm is a thick solution that fills each cell and is enclosed by the cell membrane. It is mainly composed of water, salts, and proteins. In eukaryotic cells, t
Mitosis is only done by _____________________ cells and it makes ___________________________ cells.
Answer: Eukaryotic cells, daughter cells
Answer:
Eukaryotic Cells and Daughter Cells
Explanation:
Only eukaryotes perform mitosis, and since mitosis is a form of asexual reproduction, the cells that result from mitosis are "clones." These are referred to as daughter cells.
What is the answer to number 2??
Answer:
Animalia
Fungi
Protista
I hope this helps <3
HOW DOES STRESS AFFECT YOUR FOCUS???
Hint: The shallower our breath, the less oxygen that reaches our brain, and the harder it is to focus.
1: When you are stressed you start breathing more deeply and makes it harder to focus.
2: When you are stressed more oxygen gets to your brain and makes it harder to focus.
3. When you are stressed you start breathing more deeply and that delivers more oxygen to your brain helps you focus.
4. none of these
Answer:
Ironically, stress does improve concentration for a very short period of time. This is due to the body releasing chemicals into the brain to help it focus and pushing adrenaline into the bloodstream in order to heighten the senses, which helps the body hone in and focus on tasks at hand.
Explanation:
3.
What is the most important thing to remember about ecological succession?
What two physical structures help protect the plant and animal against environmental conditions?(11 points) Keep it simple plz
Answer:
Is it any two or is it specific? If so....
Explanation:
Sometimes, both plants and animals can physically change when there is a change in temperature or environment. For example, some plants are really good at surviving in drought-like conditions (cacti). The spikes on the cactus collect water to store for the cactus. Other times, animals (such as the whale or polar bear) have extra thick fur or blubber as insulation when it gets cold. Brrrrrr.
Hope I helped! :)
PLeased help and no links and no files pleased Why do you think we use more digital items then analog?