Answers
Answer:
The model is called a double helix because two long strands twist around each other like a twisted ladder. The rails of the ladder are made of alternating sugar and phosphate molecules. The steps of the ladder are made of two bases joined together with either two or three weak hydrogen bonds.
Explanation:
Related Questions
endosymbiosis theory
Answers
Answer:
The endosymbiotic theory states that some of the organelles in eukaryotic cells were once prokaryotic microbes.
What relationships do crocodiles have with early reptiles?1- Crocodiles look similar to early reptiles.2- All extinct reptiles look like crocodiles.3- All extinct reptiles live in water.4- Crocodiles provide information why some reptiles became extinct.
Answers
It is said that the members of the crocodilian order (which includes crocodiles) have a very slow rate of genome evolution and therefore modern species of this order look very similar to their Cretaceous ancestors (early reptiles)
So the correct answer to this option is "1- Crocodiles look similar to early reptiles."
Prokaryotic cells regulate their protein synthesis through a set of genes called
Answers
Answer:
genes turn of during this stage
Explanation:
most regulatory proteins are negative therefore they turn Gene's off
In adults, the lung does not normally grow larger or regenerate cells.
Based on this knowledge, most adult lung cells would be expected to:
Answers
Answer:
Based on a simple inference, it could be anything but eh:
Adault lung cells would be expected to deteriroate over time at they do not have the ability to regenerate or heal themselves.
In two or three well-developed paragraphs, explain how pollution can come from both natural sources and from human activities. Provide examples of each.
Answers
Pollution can come from both natural sources and human activities depending on the type of pollutant.
What is pollution?It is the release of substances into the environment to the extent that the well-being of plants, animals, and humans starts getting affected.
Substances that are released into the environment to the extent that they start affecting the organisms in the environment negatively are known as pollutants.
Pollutants can come from natural sources or as a result of human activities.
For example pollutants such as oxides of sulfur, methane, carbon dioxide, etc. can come from natural processes such as volcanic eruptions, activities of microbes, etc.
Pollutants such as oxides of carbon and sulfur can also be generated as a result of human activities such as the burning of coal, technological inventions, etc.
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What is the main function of nutrients? A.helps maintain body temperature
B. keep out unwanted microorganism. C. aids in the growth and development D. helps breakdown fats
Answers
Answer:
Option C
Explanation:
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Use the word list at the beginning of the unit to help complete the summary paragraph below. All organisms are made up of __________, the smallest units of life. A _________________ organism may only contain one cell! There are 2 types of __________________, sexual and __________. An organism needs ____________ and a constant supply of materials to do any type of cellular work such as metabolism. As food is used up, it must be replaced in order for the cell to ___________, create more energy and repair itself. ___________________ is a term used for all of the chemical reactions that occur within the cell and the organism. Key to the cell’s survival is its ability to maintain stable internal conditions. This important characteristic of life is called _______________.
Answers
Answer:
Explanation:
asexual
A developer proposes to drain an estuary, and then use the land to build an ocean-side hotel, houses, and parking lots. Which would be the MOST LIKELY effect of the new development on the local ecosystem?
a
death of coral animals and loss of the coral reef ecosystem
b
loss of spawning and nursery grounds for many fishes and shellfish
c
increased salinity of ocean water
d
reduction of primary productivity for the ocean ecosystem
Answers
Answer:
please Mark me Brainliest
Explanation:
B. Loss of spawning and nursery grounds for many fishes and shellfish would be the MOST LIKELY effect of the new development on the local ecosystem. Draining an estuary would destroy the habitat of many aquatic species, including fish and shellfish that use the estuary as a spawning and nursery ground. This would have a cascading effect on the entire ecosystem, as the loss of these species would impact the food web and alter the balance of the ecosystem. While the other options are possible effects of the development, they are less likely than the loss of spawning and nursery grounds for fish and shellfish.
Did eskimos eat penguins?
Answers
Answer:
yes true
Explanation:
Give an example ecological disturbance. Light Disturbance? Extreme Disturbance.
Answers
Answer:
In contrast, major disturbances include large-scale wind events (such as tropical cyclones), volcanic eruptions, tsunamis, intense forest fires, epidemics, ocean temperature changes stemming from El Niño events or other climate phenomena, and pollution and land-use conversion caused by humans.
Explanation:
The diagram reveals that lipids and proteins are both parts of cell membranes. They have different functions because lipids work to А remove nucleic acids from the cell membrane, and proteins work to hold the cell membrane together. B hold the cell membrane together, and proteins move chemicals across the cell membrane. С stiffen the cell membrane, and proteins create fibers that attach to the ends of the lipids. D move chemicals across the cell membrane, and proteins work to store water in the cell membrane.
Answers
Answer:
There is no diagram in this question but the question can still be answered without it.
B. hold the cell membrane together, and proteins move chemicals across the cell membrane
Explanation:
The fluid mosaic model, which describes the structure of the cell membrane, reveals that it contains both lipids and protein constituents. These components, however, performs different functions in the cell membrane of organisms.
The lipid component of the cell membrane, which comprises of glycolipids and cholesterol, hold the cell membrane together while proteins called transport proteins help move chemicals across the cell membrane.
in human, the allele for hemophilia, h, is recessive. Which phenotype is displayed in an individual with the genotype XhY
Answers
Hemophilia is a genetic disorder caused by the recessive allele of a diallelic X-linked gene. Hemophilic men carry the recessive allele in their X chromosome. The man XhY is hemophilic.
What is hemophilia?Hemophilia is a hemorrhagic affection that occurs because the blood does not coagulate as it should in normal conditions.
Hemophilia is a genetic X-linked disorder caused by the recessive form of a diallelic gene.
The recessive allele h codes for hemophilia, The dominant allele is H and codes for the normal phenotype.In the case of women, this gene expresses complete dominance, meaning that an heterozygous woman is normal but carrier.
Any man who gets the X chromosome carrying the recessive allele expresses the affection.
Let us represent the dominant allele H with the symbol + and the recessive allele h with the symbol -.
Genotypes Phenotypes
X⁺X⁺ Normal woman
X⁺X⁻ Normal and carrier woman
X⁻X⁻ Hemophilic woman
X⁺Y Normal man
X⁻Y Hemophilic man
In the exposed exposed example, the individual XhY is a man that expresses hemophilia, since he has the X chromosome carrying the recessive allele.
The phenotype displayed in the individual whose genotype is XhY is hemophilia.
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define kinetic energy and thermal energy. Describe what happens to each as the temperature of a substances increases.
Answers
Explanation:
All matter is made up of particles that are constantly moving. The motion of the particles results in kinetic energy. The part of total internal energy that can be transferred is thermal energy. As temperature increases, the particles in a substance move faster and have greater kinetic and thermal energy.
Answer:
All matter is made up of particles that are constantly moving. The motion of the particles results in kinetic energy. The part of total internal energy that can be transferred is thermal energy. As temperature increases, the particles in a substance move faster and have greater kinetic and thermal energy.
Explanation:
Put the steps of our solar system's formation in the order scientists think they happened. 1₁ A cloud of gases and dust collapsed and formed a swirling disk as gravity pulled the matter together. Gravity pulled most of the mass in the disk of gas and dust to the center as the Sun formed. ++ Planets formed regular orbits around the Sun because of gravity and inertia, Planets formed as materials in the swirling disk stuck together and were held together by gravity.
Answers
solar system formed about 4.5 billion years ago from a dense cloud of interstellar gas and dust.
How was solar system's formed step by step?The Sun and the planets formed together, 4.6 billion years ago.from a cloud of gas and dust called the solar nebula.A shock wave from a nearby supernova explosion probably initiated the collapse of the solar nebula.The Sun formed in the center, and the planets formed in a thin disk orbiting around it.The planets, in order of their distance outward from the Sun, are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Four planets—Jupiter through Neptune—have ring systems, and all but Mercury and Venus have one or more moons.Our solar system formed about 4.5 billion years ago from a dense cloud of interstellar gas and dust. The cloud collapsed, possibly due to the shockwave of a nearby exploding star, called a supernova. When this dust cloud collapsed, it formed a solar nebula—a spinning, swirling disk of material.To learn more about solar system refers to;
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Why do i only have one Dimple on my left cheek?
Answers
Answer:
Some people may have only one dimple, but not on their cheek. On their chin. This is called a cleft chin. This is not hereditary but is a result of the incomplete merging of the left and right halves of the lower jaw during embryological development.
Explanation:
A cell which lacks nucleus will not have?
Answers
Answer:
Will not have mitochondria
Explanation:
A cell with no nucleus is a procaryote. If the cell does not have a nucleus, it will not have organelles, but will still have DNA (chromosomes)
Answer:
membrane bound organelles.
Explanation:
a cell which lacks nucleus will not have membrane bound organelles.
Help please I'll give brainlist
The environment limits population growth by changing birth and death rates. Briefly describe how each environmental factor listed below influences population size. Also, identify each environmental factor as a biotic or abiotic factor
Competitors
Disease
Food
Ph level
Prediction
Soil type
Temperature
Water availability
Answers
Answer:
Disease
Ph level
Water availability
Soil type
Explanation:
Sr.
(BbEe * BbEe)
The Punnett square shows a text cross of mice that are
heterozygous for both traits. What will their offspring be?
Fill in the white boxes of the Punnett square with all
possible offspring genotypes.
Punnett
BE
Square
BE
BBEE
A male mouse that is
heterozygous for both
genes (BbEe)
Во
БЕ
bo
Be
ВВЕe
BBEE
BbEe
Bbee
C
bE
bbEE
A female mouse that is
heterozygous for both
genes (BbEe)
be
bbee
DONE
Answers
Answer:why donI not see the punnet square?????
genotype and phenotypes below
Explanation:
BbEe x BbEe
BBEE, BBEe, BbEE, BbEe
BBEe, BBee, BbEe, Bbee
BbEE, BbEe, bbEE, bbEe
BbEe, Bbee, bbEe, bbee
Phenotype
BE 9
Be 3
bE 3
be 1
There is no indication here that these genes are sex-linked, so phenotypes are as they are regardless of sex, i.e. (b)(e)XX and (b)(e)XY are the same
The Punnett square shows a text cross of mice that are heterozygous for both traits. What will their offspring be?
A male mouse that is heterozygous for both genes (BbEe)
A female mouse that is heterozygous for both genes (BbEe)
Punnet Square BE Be bE be
BE BBEE BBEe BbEE BbEe
Be BBEe BBee BbEe Bbee
bE BbEE BbEe bbEE bbEe
Be BbEe Bbee bbEe bbee
(I'm sorry if this might be confusing but I hope It helps)
When arterial blood pressure falls the body compensates to raise the blood pressure. Explain this process.
Answers
Answer:
the body distributes more blood to the body surface where it can ... Changes in diameter affect peripheral resistance, pressure, and flow, which ... the aorta and carotid arteries: The aortic sinuses are found in the walls of the ... When blood pressure drops too low, the rate of baroreceptor firing decreases.
Explanation:
Please help with this. Will give Brainliest.
Answers
Answer:
A trust me i think im right i want brainiest
Explanation:
Which of the following statements is true concerning biodiversity?
Answers
Last one - Biodiversity is the diversity of species in an area, which makes an ecosystem better prepared for major changes
Explanation:
If one crop struggles to grow then there will be plenty of others to substitute it. If a prey animal is dying at a faster rate and harder to find, predators can have other prey options and so forth. Biodiversity makes it so ecosystems can get past change.
Answer:
a
Explanation:
Will give brainlist
The temperature of a substance changes from 120 C to 35 C. Which of the following is true?
The Kinetic Energy of the particles did not change.
The particles of the substance resulted in a high Kinetic Energy.
The particles of the substance initially had high Kinetic Energy.
Answers
The particles of the substance initially had high Kinetic Energy.
Does the kinetic energy of a particle change as the temperature changes?Gas particles move quickly in all directions and regularly collide with one another and the container's side. The particles gather kinetic energy and accelerate as the temperature rises. The particles' real average speed is influenced by their mass and temperature.
In liquids, particles are quite close together and move with random motion throughout the container. Due to the closer proximity of the particles, collisions between them happen more frequently than in gases even if particles are moving quickly in all directions.
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In which direction of the wave motion do longitudinal waves transfer energy
Answers
Answer:
B- Parallel
Explanation:
just took the test
Unlike the methods of early scientists, how did Sir Francis Bacon believe basic laws of science should be determined?
by using inductive reasoning based on empirical evidence
by using inductive reasoning based on a few basic truths
by using deductive reasoning based on a few basic truths
by using deductive reasoning based on empirical evidence
Answers
by using inductive reasoning based on empirical evidence
Put the steps of non specific immune response in order.
1. Fluid and clotting elements flush the area.
II. Anti-inflammatory
proteins are released.
III. Macrophages ingest and destroy bacteria.
IV. Cells release inflammatory proteins
A. I, III, II, IV
B. IV, I, III, II
C. II, I, III, IV
D. III, I, IV, II
Answers
BAnswer:
Explanation:
The correct order of the steps in the non-specific immune response is: C:- (II.) Anti-inflammatory proteins are released; (I.) Fluid and clotting elements flush the area; (III.) Macrophages ingest and destroy bacteria; (IV.) Cells release inflammatory proteins.
The non-specific immune response, also known as innate immunity, is the first line of defense against pathogens that enter the body. It provides immediate and general protection without requiring prior exposure to the specific pathogen. The non-specific immune response is present from birth and acts as a crucial early defense mechanism.
Macrophages are a type of white blood cell that plays a vital role in the immune system's non-specific immune response. They are a part of the innate immune system and are found throughout the body.
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Residual parent material refers to the *weathered rock* and *soil* that remains in its place of origin, while *transported parent material* is material that has been carried and deposited by natural agents such as water, wind, or glaciers.
The impact of these different types of parent material on *soil formation* can be significant. Residual parent material tends to contribute to the formation of soils with characteristics similar to the parent rock. The weathering process breaks down the rock into smaller particles, allowing for the development of soil horizons and the release of minerals that influence soil fertility. In contrast, transported parent material can introduce a diverse range of materials to a given area, leading to variations in soil composition, texture, and fertility. The transportation process can mix different types of sediment, resulting in the formation of heterogeneous soils with varying properties.
Answers
Residual parent material is the rock and soil that is still located in its original location and is weathered. Transported parent material is material that is carried and deposited by natural agents such as water, wind, or glaciers. The effect of these different types of parent material on soil formation can be significant.
Residual parent material usually contributes to the development of soils with qualities similar to the parent rock. The breakdown of rock into smaller particles through weathering enables the formation of soil horizons and the release of minerals that influence soil fertility.
The physical and chemical characteristics of soils derived from this form of parent material are often similar and homogeneous, allowing for predictable fertility and properties. Transported parent material, on the other hand, can introduce a diverse range of materials to a given area, resulting in variations in soil composition, texture, and fertility.
The transportation process can blend different types of sediment, resulting in the formation of heterogeneous soils with different characteristics. Transported parent material can also be exposed to weathering processes, altering its original composition and resulting in soils with varying degrees of fertility.
While transported parent material can increase the diversity of soil properties in an area, it can also make it difficult to predict soil characteristics, particularly in areas where different types of sediment have been deposited. The relationship between parent material and soil development is complex, with both the initial characteristics of the material and the surrounding environment influencing soil properties.
In general, residual parent material contributes to the development of homogeneous soils with predictable properties, while transported parent material can result in more diverse and heterogeneous soils.
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What organism has a central brain
Flatworm
Hydra
Fish
Sponge
Please Hurry!
Answers
What is special about animals that allows them to be mobile in some way?
They are multicellular.
Their brains are bigger, so they can move.
Their cells lack a rigid cell wall.
They have fur which helps them to run.
Answers
The lack of a rigid cell wall is an animal feature that allows them to be mobile in some way.
What is the cell wall?The cell wall is a cellular structure (organelle) that provides support to plant and fungi cells.
Animals are mobile because they do not have this rigid structure that otherwise will hamper their motion.
In conclusion, animals cells do not have cell walls which helps them to be mobile.
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Which description properly describes a step involved in cellular respiration?
A) Glucose is created, then the energy gained is transferred to the energy molecule.
B) Carbon dioxide is combined with oxygen to make glucose.
C) Water is divided into carbon dioxide and glucose.
D) Oxygen is combined with the carbon atoms left from the glucose molecule.
Answers
Option D is the correct answer of the given multiple choice question , due to the process of phosphorylation and ATP synthesis .
What is phosphorylation ?Oxygen is combined with the carbon atoms left from the glucose molecule, properly describes a step involved in cellular respiration. Cellular respiration is a process by which cells convert glucose and oxygen into energy, carbon dioxide, and water.
This process occurs in three stages: glycolysis, the citric acid cycle, and oxidative phosphorylation. During the final stage of oxidative phosphorylation, oxygen is combined with the carbon atoms left from the glucose molecule, forming carbon dioxide, while energy is released and stored in the form of ATP. This step is crucial for the production of ATP, which is used by cells to power various cellular
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What is earth’s approximate rate of movement along its orbit?
Answers
Answer:
Earth revolves in orbit around the sun in 365 days, 6 hours, 9 minutes with reference to the stars, at a speed ranging from 29.29 to 30.29 km/s.
Explanation: