Answer:
This question lacks options, options are: A) DNA replication is semiconservative. B) DNA replication is conservative. C) RNA synthesis is conservative. D) DNA replication is not conservative. The correct answer is A.
Explanation:
Watson and Crick proposed the semi-conservative hypothesis (later demonstrated by Meselson and Stahl in 1957), according to which new DNA molecules formed from an old one have an old and a new strand. This replication model assumed that the double helix DNA separates its two strands and each one serves as a template to synthesize a new strand following the complementary rules of nitrogenous bases. This model was called Semiconservative, since the two newly synthesized double helices have an old strand (an old half) and a new strand (a new half).
The process of the formation of new DNA from the older DNA is called replication.
The answer to the following question is semi conversation of DNA.
In the replication, there are two-strand in which one stand is template strand and the other stand is called leading strand. Both the strands act as a template strand and is being copied by the DNA polymerase.
These template strands formed the new DNA and joined it by the DNA ligase to complete it.
Hence, In DNA replication, the resulting daughter molecules contain one strand of the original parental DNA and one new strand. This phenomenon is known as semi-conservation.
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what is the name given to the male cell in the flower
Answer:
The name given to the male cell in the flower is called stamens and usually surrounds the pistil.
Explanation:
Hope this helps.
is variation always caused by the surroundings?
Answer:
Some variation is the result of differences in the surroundings, or what an individual does. This is called environmental variation.
Question:
Is variation always caused by the surroundings?
Answer:
Some variation is the result of differences in the surroundings, or what an individual does. This is called environmental variation.
Hope it helps you
A diagram shows a potato producing new tubers. Buds on the parent plant grow into stems that grow downwards called stolons. The end of each stolon develop in to new tuber.
1) Give two pieces of evidence which show that this is an asexual method of reproduction.
2) Explain why all the new tubers will be genetically identical.
Answer/Explanation:
Asexual reproduction is a type of reproduction in which new organisms that are identical are formed form a parent without the fusion of male and female gametes and do not require fertilization. Offspring formed are usually identical genetically, and are referred to as clones of the parent. Usually, only one parent is involved.
1. Two pieces of evidence that shows the potato growing is an asexual method of reproduction are:
i. Only one parent is involved
ii. The new tubers are identical (clones of the parent)
2. Reasons Why the new tubers will be genetically identical:
i. They grow from 1 parent by asexual reproduction
ii. No mixing of male and female gametes, so no exchange of genes takes place
Why has the number of people in the world increased if the human population growth rate has decreased?
Answer:
Life expectancy has steadily risen.
People live longer lives.
To understand the reasons why the number of people in the world has increased and the population growth rate has decreased, it is necessary to understand how the world's demographic growth rate is calculated.
The calculation is made from the balance between the total number of people alive and the total number of deaths that occurred in a period of time.
Therefore, we can understand that the population growth rate has decreased due to several relevant factors, such as:
Increased life expectancy.The decrease in infant mortality.Rising fertility rates.Urbanization.Economic development.These are some of the reasons that help us understand why population numbers increase and population growth rate decreases.
Economic development, new technologies and a better quality of life for the population are directly related to the decrease in the population growth rate.
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When you touch an object that is very hot you quickly pull your hand back. What is the correct pathway of nerve impulses for this behavior?
A. Heat receptors in the hand, sensory neurons, brain, motor neurons, hand muscles.
B. Heat receptors in the hand, motor neurons, hand muscles, sensory neurons, brain.
C. Hand muscles, motor neurons, brain, sensory neurons, heat receptors in hand.
D. Brain, sensory neurons, heat receptors in hand, motor neurons, hand muscles.
A heat receptor>sensory neuron>brain>motor neuron>>hand muscles
Answer:
a
Explanation:
You are viewing an organ of the respiratory system and note the following tissues: folded mucosal layer containing simple cuboidal epithelium and smooth muscle, shifting into simple squamous epithelia. Identify the organ.
Answer:
Respiratory bronchiole
Explanation:
The respiratory bronchioles represent the narrowest airways within the lung, being continuations of terminal bronchioles that have approx. 0.5 mm in size. The epithelium of the respiratory bronchiole is composed of cuboidal ciliated cells and a small number of non-ciliated (secretory) Clara cells. The respiratory bronchioles lead into alveolar ducts composed of smooth muscle and connective tissue (i.e., elastin and collagen), connecting the respiratory bronchioles to the alveolar sacs.
Which term is defined as elements that are found in the environment
Answer:
Natural Resources
Explanation:
Drag the substances into the correct category
water
Reactants Products
oxygen
energy
carbon dioxide
glucose
Answer: 100% on edge
Reactants:: glucose and oxygen
Products:: carbon dioxide, energy, and water
function of mound layering?
Heavy-stemmed shrubs and trees benefit from mound layering. Cover the main stem by clipping it down to the ground. The buds at the stem's tip will develop into a number of rooted branches. Inside the moss, roots will form, and you can cut the rooted tip from the plant.
After a severe burn, new skin may grow outward from the hair follicles. Why would new growth originate at the hair follicles
Answer:
xsdcfvgbhnj
Explanation:
If the first child of two parents with polydactyly does not exhibit this trait, what is the probability that their next child will have polydactyly
Answer:
No
Explanation:
Just because you are deferant dose not mean that your baby wourld have to turn out that way.
why is DNA a useful form of evidence for developing a phylogenetic tree?
a) DNA never changes
b) DNA is the newest thing in science
c) DNA is passed from generation to generation
Answer:
DNA is useful for a phylogenetic tree because DNA is passed from generation to generation.
the answer;
should be C
HAVE A NİCE DAY
Explanation:
greeetings from Turkey ツ
think about what you know about plant roots. how do plants absorb mineral salt from the soil?
Answer:
Plants absorb water from the soil by osmosis and they absorb mineral ions from the soil by active transport, against the concentration gradient.
can someone go to my profile and write the definitions in your own words that I posted today? there are 4 of them and I can give you brainliest for each of them since there would be more than one person.
Thank you!
Answer:
ok i go
Explanation:
your experience is so so good and your frofile
list few points on the importance of sun in power supply.
Answer:
The sun provides more than enough energy to meet the whole world's energy needs, and unlike fossil fuels, it won't run out anytime soon. As a renewable energy source, the only limitation of solar power is our ability to turn it into electricity in an efficient and cost-effective way.
Answer:
Nothing is more important to us on Earth than the Sun. Without the Sun's heat and light, the Earth would be a lifeless ball of ice-coated rock. The Sun warms our seas, stirs our atmosphere, generates our weather patterns, and gives energy to the growing green plants that provide the food and oxygen for life on Earth.
how would hemoglobin content differ in a person living in philadelphia compared to someone living in denver
Answer:
The correct answer is - the difference in altitudes.
Explanation:
The hemoglobin in the person of Denver who lives at a higher altitude than the person who lives in Philadelphia will be much higher. This is due to the fact that at higher elevation or altitude atmospheric pressure decreases that causes hemoglobin to stick to the RBCs and that results in less oxygen level in the body.
To compensate for this low level of oxygen levels hemoglobin content need to be higher in people living at a higher elevation.
Describe how pollution can cause acid rain, and how acid rain affects the ecosystems of surrounding areas?
Pollution specifically air pollution can cause acid. Gases such as sulphur (IV) oxide and Nitrogen (IV) oxide when they are released into the atmosphere and comes into contact with precipitation, that is rain water causes acid rain. Sulphurous acid and Nitric acid is formed thus the rain falls in acidic form.
Acid rain when it falls on the leaves of the flora (plants) causes removal of the green colouring matter (chlorophyll) thus making plants to be deficient of food. Food in plants is made my the process of photosynthesis, removal of chlorophyll in plants kills them due to lack of food.
Also when acid rain finds it's way into the water bodies through surface runoff, aquatic animals such as fishes die due to lack of favourable environment and oxygen deficiency in water. Acidity in the soil also kills important decomposers therefore soil aeration is altered.
An ecosystem contains biotic and abiotic
factors. Which of the following would be
an abiotic factor?
A. a microorganism on an animal
B. fungi growing on a tree
C. nutrients in the soil
Answer:
nutrients in the soil is the correct answer
The correct answer is option (c) nutrients in the soil.
What is biotic and abiotic factors ?
Biotic and abiotic are the two essential factors responsible for shaping the ecosystem.The biotic factors refer to all the living beings present in an ecosystem, and the abiotic factors refer to all the non-living components like physical conditions and chemical agents in an ecosystem. Therefore, both the abiotic and biotic resources affect the survival and reproduction process.
Why other options are incorrect?
Option (a), (b) are incorrect as they are biotic factors.
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_______
are responsible for the structures and
functions of organisms.
DONE
Large biomolecules and macromolecules known as proteins are made up of one or more extended chains of amino acid residues. Proteins are responsible for the structures and functions of organisms.
What is Protein?Large, intricate molecules classified as proteins perform an array of essential roles in the human body. They are fundamental for the structure, operation, and control of the body's tissues and organs and perform out the majority of their work inside cells.
Many thousands of amino acids, which seem to be smaller components that make up proteins, are linked together in lengthy chains to form proteins. To form a protein, 20 different kinds of amino acids can be mixed. Each protein's precise function and characteristic 3-dimensional structure are established by its amino acid sequence.
Thus, Proteins are responsible for the structures and functions of organisms.
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Which statement best describes how a catalyst can speed up a chemical reaction?
a. The catalyst decreases the activation energy needed.
b. The catalyst increases the concentration of products.
c. The catalyst binds to enzymes to release substrates.
d. The catalyst increases the concentration of reactants.
D. The catalyst increases the concentration of reactants.
Answer:
D. The catalyst increases the concentration of reactants.
Explanation:
What does alteration of generation mean?
Answer:
Alteration of generation, is the type of life cycle that occurs in those plants and algae in the Archaeplastida and the Heterokontophyta that have distinct haploid sexual and diploid asexual stages.
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explain the importance of dimensioning in biology
Answer:
Even if you make a drawing to scale, it would be difficult to determine the exact precision that is needed.
It would be time consuming to measure each of the lines to determine measurement.
The basis for modern part dimensioning is the need for interchangeable parts (being able to buy something off the shelf that fits what you already have)
Explanation
When dimensioning, it is good technique to avoid listing the dimension more than once through out the drawing.
If you need to list a dimension more than once, for accuracy or ease of viewing, you must encase the dimension within a set of brackets.
Answer:
The purpose of dimensioning is to provide a clear and complete description of an object. A complete set of dimensions will permit only one interpretation needed to construct the part. Dimensioning should follow these guidelines. Accuracy: correct values must be given.
For a reaction, A H= 2 kJ. For which value of TA Sis the reaction spontaneous?
Answer:
option a is the answer I think so
Answer:
option a
Explanation:
For which value of TA Sis the reaction spontaneous?
In a cell, resembling a factory which organelle best describes the factory job at hand? Answer the following.
1. Job:
Conveyor Belt
Job Description:
Moves the products to the shipping department
2. Job: Assembly Line
Job Description:
Products are created from raw materials on the assembly line
3. Job: Packaging and shipping
Job description:
Packs nutrients and sends them off for distribution
Identify the error in the following statement: “Photosynthesis is a chemical reaction that takes place in the chloroplasts of green plant cells, where chemical energy is used to convert carbon dioxide and water into glucose and oxygen.”
A. “chloroplasts” should be “mitochondria”
B. “water” and “oxygen” should be switched
C. “chemical” should be “light”
D. No errors
Answer:
C light energy instead of chemical energy
Explanation:
Photosynthesis does take place in the chloroplasts (repirarion takes place in the mitochondria)
The equation for photosynthesis is Carbon dioxide + water --> glucose + oxygen (so that statement is correct)
Answer:
D. No errors
Explanation:
Which of the following is NOT part of the circulatory system?
lungs
heart
arteries
blood
66. A 64-year-old woman, who has always been proud of her suntanned, healthy look, is referred to a dermatologist with a blue-violet, painless, 1.5-cm lump in the skin of her left shoulder. The lump is firm and cannot be moved, and has grown very rapidly over the past few weeks. The mass is removed surgically and the pathologist diagnoses it as a Merkel cell carcinoma. If the UV radiation to which her skin was exposed affected the Merkel cells, what other cell type sharing the same specific epidermal layer might also be affected
Answer:
Basal stem cells for keratinocytes
Explanation:
Keratinocytes are epidermal cells located in the outermost layer of the skin (i.e., the epidermis). Moreover, the cells located in the basal layer of the skin are known as basal keratinocytes or basal cells. These basal cells are proliferative cells that undergo differentiation in order to form suprabasal epidermal layers. Merkel cells are neuroendocrine cells that are located in the basal layer of the skin (scattered among basal keratinocytes), which are attached to surrounding keratinocytes by intercellular junctions called desmosomes.
Cationic detergents are surface active agents, also known as ______, which damage bacteria by binding bacterial surface proteins and disrupting ______.
Can anyone tell me a simple definition for chemical coordination?
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Chemical Coordination is like the coordination that occurs between 1 or more organs / organ systems in multicellular organisms (for example ↦ humans, animals, birds etc.). During this chemical coordination, cells in the organs / organ systems will produce some chemicals which helps in regulating the activities of other cells in the body.
Example ↦ Endocrine glands in the pancreas secrete hormones which consist of proteins & lipids.
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what is a skeleton and give two characteristics of a mammal
A skeleton is a structural frame that supports an animal body.
The skeletal system of mammals and other vertebrates is broadly divisible functionally into axial and appendicular portions.
There are two major types of skeletons: solid and fluid. Solid skeletons can be internal, called an endoskeleton, or external, called an exoskeleton, and may be further classified as pliant (elastic/movable) or rigid (hard/non-movable).
Fluid skeletons are always internal.
The presence of hair or fur.
A four-chambered heart.
Answer: well I know the skeleton is the bone structure in some living organisms if there a vertebrate
