Why is the color of blood carried by veins dark red?
veins are further below the skin and more difficult to see
this blood has no carbon dioxide to color it
this blood has a low oxygen content
this blood has a high oxygen content
In the troposphere, the higher the altitude (distance from the ground), the _______ the atmospheric pressure.
Answer:
Explanation:
The troposhere is the lowest layer in the atmosphere and the largest in mass taken about 80% of the mass.
The higher the altitude in the troposphere the lower the atmospheric pressure. At the bottom of troposphere the air is very warm and it gets cool as one moves through the troposphere. The density of the air also decrease with altitude or height above the sea level and this cause the cabins of high-flying jet aircraft to be pressurized.
The atmospheric pressure in the troposphere is lower with higher the altitude (distance from the ground).
What is troposphere?The troposphere is the lowest layer of the atmosphere of Earth. This layer contains the 75% of total mass of the atmosphere.
The variation in the temperature and atmospheric pressure in troposphere layer-
Temperature- The temperature of troposphere is decreases with increasing the altitude of this layer. Atmospheric Pressure- Troposphere ranges the atmospheric pressure between 1000 millibars to the 100 millibars. The value of atmospheric pressure is decreases with increasing the altitude of this layer. It drops 1 inch of Mercury per 1000 ft above the level of the sea.Thus, the atmospheric pressure in the troposphere is lower with higher the altitude (distance from the ground).
Learn more about the troposphere here;
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Which combination correctly pairs a product from a reaction in the nitrogen cycle with a molecule synthesized by plants using that product
Answer:
(A) nitrates—proteins
Note: The question is not complete. The complete question is given below:
Which combination correctly pairs a product from a reaction in the nitrogen cycle with a molecule
synthesized by plants using that product?
(A) nitrates—proteins
(B) ammonia—carbohydrates
(C) nitrogenous wastes—nitrites
(D) atmospheric nitrogen—nitrates
(E) atmospheric nitrogen—ammonia
Explanation:
The nitrogen cycle refers to the cycle through which nitrogen is transferred for use through both living and non-living things, involving the atmosphere, soil, water, plants, animals and bacteria.
The nitrogen cycle is especially important for living things because nitrogen is essential for the formation of amino acids which form proteins.
The nitrogen cycle occurs in five stages:
1. Nitrogen fixation - Nitrogen gas from the air is converted to nitrate compounds by nitrogen-fixing bacteria in soil or root nodules. Lightning also converts nitrogen gas to nitrate compounds.
2. Nitrification - Ammonia is converted to nitrates by nitrifying bacteria in the soil.
3. Assimilation - Plants absorb nitrates from the soil and use them to make proteins. The plant is then eaten by an animal and are used to produce animal protein.
4. Ammonification- Decomposers break down the bodies of dead organisms, urine and faeces converting them to ammonia in the soil, which is then converted to nitrates by nitrifying bacteria.
5. Denitrification - Denitrifying bacteria in the soil break down nitrates and return nitrogen back to the air.
From the above stages and the options provided, the correct option is A - nitrates from the nitrogen cycle is converted to protein by plants.
An organism, by definition, consists of multiple cells.
True
False
What is identified in blood type analysis?
Different polysaccharides
Different proteins
Different lipids
Different amino acids
Each trait a person has, such as eye or hair color, is ultimately the result of a single allele in DNA.
True
False
Which statement describes the relationship between bond strength and the
melting and boiling points of a substance?
A. As the force between the particles increases, the melting and
boiling points also increase.
B. As the force between the particles increases, the melting point
increases and the boiling point decreases.
C. As the force between the particies increases, the melting point
decreases and the boiling point increases
D. As the force between the particles increases, the melting and
boiling points decrease.
Answer:
D
Explanation:
hope this helps:))))))))))
nucleic acid used in a 9th grade level sentence
don’t send links
Most exact matching problems arise when handeling nucleic acid sequences.
Certain tags can enter the nucleic acid database and identify the trapped gene.
The structure of nucleic acid junctions plays a central role in their biological function.
what is calcination and roasting?
Answer:
Explanation:
Calcination is a process in which ore is heated in the absence of air or air might be supplied in limited quantity. Roasting involves heating of ore lower than its melting point in the presence of air or oxygen. Calcination involves thermal decomposition of carbonate ores.
Help quick!
Which systems are involved with the breakdown and delivery of nutrients from recently eaten food to the cells and the removal of waste materials from the body?
A.
excretory, skeletal, and digestive
B.
digestive, nervous, and endocrine
C.
excretory, circulatory, and nervous
D.
digestive, circulatory, and excretory
Answer:
B
Explanation:
I can't be c or d because it involves the heart. And it can go through the skeleton
In the human body, organ-systems interact with each other to maintain homeostasis. Using the diagram below, explain how this system interacts with another in the body to maintain homeostasis?
Answer:
D
Explanation:
Im pretty sure tell me if im right
Homeostasis is a regulating process of the body in response to external environments, digestive system provides glucose for cellular respiration.
How do organ systems interact to maintain homeostasis?Organ systems in our body are regulated with each other and these interactions maintain homeostasis.
The respiratory system interacts with the circulatory system for gaseous exchange and the excretory system depends on the circulatory system for blood filtration, and the nervous system regulates the system through the brain.
Homeostasis is necessary because the external environment can change anytime, and the digestive system maintains food conditions according to the body's needs.
Therefore digestive system maintains homeostasis by providing glucose for cellular respiration.
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I NEED IT NOWWW ASAP PLEASEE ITS A TEST
Plants with dark brown stems mated to ones with light colored stems: All offspring have a medium brown color.
C. Incomplete dominance
D. Polygenic
E. X-linked gene
B. Codominance
A.Dominant/recessive gene
Answer: could be Polygenic whish you the best in your test i had to take my test at home while everyone at school does it
• Homologous structures show ____ _____ on a____ anatomical theme. These are seen in organisms that are____ related. Give an example of a homologous structure from this activity:____
Explanation:
Homologous structures show individual variations on a common anatomical theme. These are seen in organisms that are closely related. 1. Give an example of a homologous structure from this activity: Crocodile
Evolution Quick Check
Which of the following principles is NOT part of Darwin's theory of evolution by natural selection?
Evolution is the biological and chemical changes that occur over generations that results in the variation of the observable traits in the organism. According to Charles Darwin evolution happened because of natural selection and many other factors.
Mutations are the ultimate source of genetic variation.
What did Darwin's theory state?Charles Darwin gave the theory of evolution and natural selection in which the major points were variation, lineage, preference and duration.According to his theory mutations are not the ultimate source of the genetic variations as natural selection and many other factors play roles in the variation and speciation.Therefore, option C is correct and is not part of the theory.
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state two changes which take place in the flower after pollination
After pollination and fertilization following changes occur in a flower: (i) The petals, stamens, style and stigma of the flower fall off. (ii) Sepals dry up and hold the ovary. (iii) The ovules confined in the ovary develop into seeds.
What gets filtered out of the blood in the nephrons due to high pressure? Select all that apply.
water
salts
fats
sugar
vitamins
protein
amino acids
ions
Answer:
Water, ions, glucose, fluids
Explanation:
This is because the nephron have network of cappilaries vessel called glomerulus . This glomerulus filter blood in the kidney to make urine. The hydrostatic force cause the filtrate to be filtered out through pressure.
The nephron also posses tubule which help to return needed or essential substances like protein, ions to the blood and then remove waste products from the blood.
Identify the major players shown in the simulation: mRNA, Codon, Amino Acid, tRNA, anticodon, ribosome.
Answer:
mRNA, tRNA and ribosome
Explanation:
mRNA, tRNA and ribosome are the major players because they perform a very important functions. Messenger RNA (mRNA) is a molecule in cells that carries instructions in the form of codes from the DNA to the sites of protein synthesis which is a ribosomes. Transfer RNA (tRNA) is a type of RNA molecule that helps in decoding a messenger RNA (mRNA) into a protein. Ribosome is an organelle present in the cell that is responsible for the production of proteins according to the instruction given by DNA.
Environmental science
What is the easiest component of biodiversity to measure?
A) Ecosystem health
B) ecosystem diversity
C) species diversity
D) genetic diversity
Your Answer is C) species diversity
Hope this helps!
How can a mutation that retains an intron's sequence and a triplet repeat mutation have a similar effect on a genes encoded protien?
Answer:
Retention of an intron and expanding triplet repeats may provide a new function for a gene, which may cause disease.
Explanation:
Tell me if its correct or wrong
Charli thinks she does better on tests after she has had coffee in the morning. One morning she drinks a cup of Folger's coffee and then does very well (A-) on her chemistry test. She does it again before her next chemistry test and again does very well (B+). Now she is convinced her hypothesis is right?
Answer:
Her hypothesis is right.
Explanation:
The Charli's hypothesis is right because caffeine present in coffee helps in boosting of memory if consume it in a normal range. Recent research indicates that caffeine may enhance long-term memory of an individual. When the memory is boost so the individual has the ability to memorize more knowledge that leads to good performance in the examination so the caffeine present in the coffee helps Charli to give good results in the test and we can say that her hypothesis is right.
Which of these is a characteristic of young amphibians?
long tails
legs
gills
lungs
Answer:
gills
Explanation:
They need the gills since they are first born underwater and live part of their life down there. They don't grow tails, legs, or lungs until later on
Ex: tadpoles
DUE SOON PLZ HELPP!!!!!!!!
Which of the following is an example of a step in an EXPERIMENTAL scientific investigation?
A. Recording the sound of a test tube breaking
B. Placing test tubes in a water bath
C. Nothing a color change in a test tube
When an organism fights with another organism over a limited resource it is called?
A. carrying capacity
B. symbiosis
C. competition
D. predator-prey relationship
Darwin's theory of evolution did NOT contain the concept that
O favorable traits are passed from one generation to the next.
O resources are unlimited in environments.
genetic variations are produced by mutations and sexual recombination.
organisms that are best adapted to their environment survive
Answer:
favorable traits are passed from one generation to another
Explanation:
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A(n)\ is an area of the planet that shaves similar conditions of climate, fauna (animal life), flora (plant life) and geography .
1.biome
2.environment
3.habitat
4.ecosystem
[tex] \bold{biome }[/tex]
⭐----------------------------------------------------------------------------------------------✄ ----------------------------------------------------------------------------------⭐
BRAINLYMENTALMENTE
Can you define these words?? Thanks!
Cellulose
Chlorophyll
Chloroplast
Bryophyte
Pterophyte
Gymnosperm
Cone
Angiosperm
Flower
Cuticle
Vascular tissue
Xylem
Phloem
Roots
Root hairs
Stems
Leaves
Photosynthesis
Answer:
Cellulose - It is described as a complex carbohydrate that forms the main constituent of the cell wall in most plants and is important in the manufacture of numerous products like pharmaceuticals, textiles, etc.
Chlorophyll - Any of a group of green pigments that are found in the chloroplasts of plants and in other photosynthetic organisms such as cyanobacteria.
Chloroplast - An organelle found in the cells of green plants and in photosynthetic algae, where photosynthesis takes place.
Bryophyte - Any plant of the division Bryophyta, defined "sensu lato" to comprise the mosses, liverworts, and hornworts, and corresponding to all embryophytes that are not vascular plants.
Pterophyte - It is characterized as any fern(seedless plant) that is a division of Pteridophyta.
Gymnosperm - Any plant such as a conifer whose seeds are not enclosed in an ovary or those who don't bear seeds or fruits. Example; Cycads.
Cone - A cone-shaped flower head of various plants like banksias and proteas.
Angiosperm - Any flowering plant characterized by having ovules enclosed in an ovary and thus, produces fruits, as well as, seeds.
Flower - A reproductive structure in angiosperms and often conspicuously colorful and typically including sepals, petals, and either or both stamens and/or a pistil.
Cuticle - A noncellular protective covering outside the many invertebrates and plants.
Vascular tissue - The complex tissues that consist of various cell types and primarily responsible for transporting liquid and other nutrients throughout the plant or animal body.
Xylem - A vascular tissue in the land plants primarily responsible for the distribution of water and minerals that are taken up by the roots and also the key component of the wood.
Phloem - A vascular tissue in land plants primarily responsible for the distribution of sugars and the nutrients manufactured in the shoot.
Roots - The part of the plant which is generally underground that anchors and supports the plant body. It absorbs and stores water and nutrients, and in some plants is able to perform vegetative propagation.
Root hairs - The rhizoid of a vascular plant or a tabular outgrowth of a trichoblast, hair-forming cell on the epidermis of a plant root.
Stems - The above-ground stalk of a vascular plant that supports individual parts of a plant like leaves, flower, fruits, etc.
Leaves - The green and flat organ that represents the most prominent feature of the most vegetative plants.
Photosynthesis - The process by which plants and other photoautotrophs convert light energy into chemical energy. For example; Plants use air, water, along with sunlight to synthesize their food(carbohydrates and waste oxygen).
2
Allele frequencies tend to remain the same
generation after generation unless acted
upon by outside forces. This is known as the
(3 Words)
Answer:
Hardy-Weinberg equilibrium
Explanation:
The Hardy-Weinberg law is established in it is that in a sufficiently large population, in which the matings occur randomly and that is not subject to mutation, selection or migration, the gene and genotype frequencies remain constant from generation to generation, once a state of equilibrium has been reached that is reached after one generation at autosomal loci. A population is said to be in equilibrium when alleles from polymorphic systems maintain their frequency in the population through generations.
what factors can change the population size?
Answer:
Birth rate, death rate, and immigration of foreign species
Name some harmful substances found in cigarette smoke. How do these
substances affect the respiratory and the circulatory systems?
Tobacco smoke contains many chemicals that are harmful to both smokers and nonsmokers.
Acetaldehyde.
Aromatic amines.
Arsenic.
Benzene.
Beryllium (a toxic metal)
1,3–Butadiene (a hazardous gas)
Cadmium (a toxic metal)
Chromium (a metallic element)
Chain Pickerel is a freshwater fish that is a member of the pike family. Chain Pickerels are found along the Eastern coast of answers - The dissolved oxygen of the water decreases
The salinity of the water decreases
The amount of light penetrating the water increases
The temperature of the water increases in the summer
question - Florida all the way around to Texas. Sometimes called a "jack fish" or a "southern pike," pickerel feed mainly on smaller fish, ambushing them with sharp teeth. These fish are often found throughout the state of Florida in rivers, lakes and creeks. Spawning occurs in late winter to spring among heavy aquatic weed growth or flooded grasses, in water from a few inches deep to several feet deep. Large number of adhesive eggs are scattered over vegetation. Based on this information, which of the following scenarios would impact the population of Chain Pickerel and cause a decrease in the population size?
Answer:
the dissolved oxygen of the water decreases.
the fish need the oxygen for respiration, breathing through their gills.
Explanation:
The salinity decreasing doesn't affect the pickerel, because it's a freshwater fish. no salt needed.
more light penetrating the water just means that more aquatic weed or grasses would grow, giving the pickerel more area to spawn their eggs.
temperature increase in the summer has no affect on the fish, since the spawning happens in late winter.
The caiman and parrot shared a common ancestor.
Question 7 options:
True
False
Answer:
The answer is true!
POST-lab Question:
What would be the effect on the butterfly population if the coloration in the environment suddenly changed? (Example: green
butterflies are living on a green plant that suddenly turns brown and loses all its leaves).
Answer:
The butterfly population would decrease or die out.
Explanation:
If the population of the green butterfly had depended on these "green plants" or leaves, they would die out without them since they use these green plants to camoflauge and blend in with them. Its something they can use to hide away from predators, and be safe from them.