Answer:
1)variation organsimes (within populations) exibit invidiual variation in appearence and behaviour
Explanation:
2) high rate of population growth
3) differential survival and reproduction
Which of the following are the main parts of the cardiovascular system?
A. thymus, lymph, lymph nodes, spleen, and tonsils
B. esophagus, stomach, small intestine, and large intestine
C. nose, pharynx, larynx, trachea, and lungs
D. heart, arteries, capillaries, and vines
Pls, help! I am currently taking a test with this question on it! I will mark brainliest if u are correct!
(D)
HEART,ARTERIES,CAPPILARIES,AND VINES
HOPE IT HELPS THANK YOU ☺
Identify all statements that accurately describe the structure of the pyruvate dehydrogenase (PDH) complex. E2 contains three domains. The complex contains multiple copies of each of three enzymes. A regulatory kinase and phosphatase are part of the mammalian PDH complex. The core of the complex is made up of several copies of E1 . Several copies each of E1 and E3 surround E2 .
Answer: The statements that correctly describe the structure of pyruvate dehydrogenase (PDH) complex are:
--> E2 contains three domains.
--> A regulatory kinase and phosphatase are part of the mammalian PDH complex.
--> Several copies each of E1 and E3 surround E2 .
Explanation:
Enzymes are proteins that speeds up a metabolic reaction by lowering the amount of energy needed to start the reaction. The type of enzyme in a cell will determine the metabolic processes that will occur in it.
Pyruvate dehydrogenase complex which is located at the mitochondria matrix, is a group of enzyme that catalyzes the breakdown of pyruvate, which is the end product of glycolysis, to form acetyl-CoA. The product formed from the reaction which is acetyl-CoA in turn enters the citric acid cycle where it is further oxidized for cellular respiration.
The structure of Pyruvate dehydrogenase complex consists of:
--> Three catalytic enzymes: These include;
• E1: This is the first enzyme of the PDH complex called pyruvate dehydrogenase. It catalyzes the removal of one carbon atom from pyruvate which leads to the production of hydrohyethyl.
• E2: This is the second enzyme of PDH complex called dihydrolipoamide S-acetyltransferase. It catalyzes the transfer of hydroxyethyl group to oxidized form of covalently bound lipoamide, and the resulting acetyl group is then transferred to free coenzyme A to form ACETYL-CoA and reduced dihydrolipoamide. Several copies each of E1 and E3 surround E2 and it consist of three DOMAINS. These domains include: N-terminal 9 kDa lipoyl domain, 4 kDa peripheral subunit-binding domain and C-terminal 28 kDa catalytic (acetyltransferase) domain.
• E3: This is the third and last enzyme of PDH complex called the flavoprotein dihydrolipoamide dehydrogenase. It re-oxidizes the lipoyl group of dihydrolipoamide-E2 to form lipoamide-E2 and NADH.
--> Two regulatory enzymes: The activities of E1 which is the rate limiting step of PDH complex regulated by phosphatases (activators) and kinases (inhibitors).
--> A binding protein: these aids in the binding of E2 to E3 enzyme in the core of PDH complex.
no links please on My question or I will report you
Answer:
B, or 113 Fahrenheit
Explanation:
Imagine five forest communities, each with 100 individuals distributed among four different tree species (W, X, Y, and Z). Which forest community would have the most relative abundance?
50W, 25X, 15Y, 10Z
70W, 10X, 10Y, 10Z
25W, 25X, 25Y, 25Z
40W, 30X, 20Y, 10Z
Answer:
the 3rd one would be most relative
Explanation:
The forest community each with 100 individuals distributed among four different tree species (W, X, Y, and Z) would have the most relative abundant option as correct 25W, 25X, 25Y, 25Z.
Diversity is described because of the unique types/sort of lifestyles paperwork gift at the earth. Diversity plays an amazing position with the aid of using Maintain the stability of nature, law of weather, cleansing of air and water, carbon sequestration and international weather change, organic productivity, vitamins cycling, stabilize earth from erosion, and lots greater function.
Mainly variety relies upon Species richness and species evenness.Species richness is the entire quantity of various species present. Species Evenness is the abundance of every species in a community.What is species?Species are frequently described as the biggest organization of organisms wherein any people of the ideal or mating kinds can produce fertile offspring, normally through reproduction. Other approaches to defining species encompass their karyotype, DNA sequence, morphology, behavior, or ecological niche.
Thus it is clear that forest communities would have the most relative abundance are 25W, 25X, 25Y, 25Z.
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Which of the following is NOT a way to prevent the spread of infectious disease?
A. Get vacinated
B. Rinse dirty cutting boards with cold water
C.Don't share personal items
D.Wash your hands
Answer: I think B
Explanation:
What relationship do the deer and rabbits have in common with the squirrels and chipmunks?
Answer:
b
Explanation:
In which division phase is the nucleolus formed and spindle fibers broken down?
A) anaphase
B) prophase
C) metaphase
D)telophase
Answer:
Prophase
Explanation:
During prophase, the nuclear envelope and nucleolus are dissolved and the chromosomes condense. The centrioles and spindle fibers begin to form at opposite poles of the cell.
Answer:
telophase
Explanation:
Spindle fibers disperse as the chromosomes are separated and become housed within two new nuclei.
Which is a product of cellular respiration?
1, Methane
2, Water
3,Oxygen gas
4, Mitochondria
Ribosomes provide the scaffolding on which tRNAs interact with mRNA during translation of an mRNA sequence to a chain of amino acids.
a. True
b. False
Answer:
a. True
Explanation:
Ribosomes are ribonucleoprotein complexes composed of RNA and proteins, which have two main roles 1-decode the message of the messenger RNA (mRNA) molecule and the formation of peptide bonds in the protein. For this purpose, each triplet of nucleotide bases or 'codon' in the mRNA sequence is used to assemble specific amino acids in the nascent polypeptide chain. Although different, both prokaryotic ribosomes and eukaryotic ribosomes are composed of two subunits: one small subunit that decodes the mRNA into a specific amino acid chain, and one large subunit that forms the peptide bonds in the polypeptide chain. Each ribosomal subunit is in turn composed of ribosomal RNAs and proteins. These ribosomal RNAs act as scaffolds by combining with proteins that assemble into ribosomes (i.e., small and large ribosome subunits).
Explain why conflict avoidance does not help in sustaining positive relationship
Answer:
Avoidance is not healthy for sustaining the positive relationships as the ignorance or avoidance can cause the damage between the relationships of the people. The maintenance of the relationship among people can be hampered by avoidance. It can make the other people feel neglected. That can cause a failed relationship.
Explanation:
Where does pollination take place for an orange tree?
A. Flowers
B. Leaves
C. Roots
D. Trunk
( please help due right now )
Answer:
its A :)
Explanation:
i got the answer correct on my work
PLEASE ANSWER ASAP
Which of the following statements accurately describe a chromosome? Select all that apply.
a. Chromosomes contain one long DNA molecule that is tightly wound
b. Every chromosome has many genes as each gene is one segment of DNA
c. Every chromosome has one gene as an entire DNA makes up a gene
d. In any given organism, the gene(s) found on one chromosome can also be found on other chromosomes.
Answer:A
Explanation:
The statements that accurately describe a chromosome are:
a. Chromosomes contain one long DNA molecule that is tightly wound.
b. Every chromosome has many genes as each gene is one segment of DNA.
d. In any given organism, the gene(s) found on one chromosome can also be found on other chromosomes.
What is a chromosome?A chromosome can be defined as a thread-like linear strand of deoxyribonucleic acid (DNA) that is typically found in the nucleus of each cell.
The characteristics of a chromosome.In Genetics, some of the characteristics of a chromosome include the following:
Chromosomes is made up of a long deoxyribonucleic acid (DNA) molecule that is tightly wound.Every chromosome consist of many genes as each gene is a single segment of deoxyribonucleic acid (DNA).In any given organism, the gene(s) that is found on a chromosome can also be found on other chromosomes.Read more on chromosome here: https://brainly.com/question/1262952
As the crocodile stays underwater, its hemoglobin delivers most of the bound As the crocodile stays underwater, its hemoglobin delivers most of the bound blank as a result of blank binding of blank to the blank conformation. as a result of As the crocodile stays underwater, its hemoglobin delivers most of the bound blank as a result of blank binding of blank to the blank conformation. binding of As the crocodile stays underwater, its hemoglobin delivers most of the bound blank as a result of blank binding of blank to the blank conformation. to the As the crocodile stays underwater, its hemoglobin delivers most of the bound blank as a result of blank binding of blank to the blank conformation. conformation.
Answer:
As the crocodiles stay underwater, its hemoglobin delivers most of the bound O2 as a result of an increased binding of HCO3 to the T conformation.
Explanation:
Crocodiles are the creatures on earth who live on land as well as in water. There are form of reptiles who belong to Phylum Chordata. They eat other animals and hunt their prey mostly hiding themselves in water. They have giant tooth which grabs their prey and kills them instantly.
Meiosis is a type of cell division that is specific to
Meiosis is a type of cell division that is specific to germ cells (gamete cells).
What is Meiosis?Meiosis may be defined as a type of cell division in which each parental cell is divided into four daughter cells. Each daughter cells are genetically unique to the parental cell and are haploid in nature.
Gamete cells are typically divided by this mechanism of cell division. This is because when toe distinctive gamete cells from male and female are fused together, the resultant zygote will have the entire set of genetic material.
The gamete cells significantly have half the amount of genetic content. Due to this, it is also known as reductional division.
Therefore, meiosis is a type of cell division that is specific to germ cells (gamete cells).
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Is it a animal or plant and y
Answer:
plants
Explanation:
plants have box like shape because they have cell wall
Help please!! | No links!
The trees in a forest were cut down to make room for a housing development. Explain how this impacts the environment.
Answer:
69
Explanation:
60+9=69
How are respiration and cellular respiration related?
Answer:
breathing is also known as respiration when you breathe in oxygen that your cells need for cellular respiration also when you breathe out carbon dioxide that your cells produce during the cellular respiration.
Explanation:
I hope this helps you ;)
Case 2: In Ghana, cowpea is a legume plant that is a significant source of nutrition for people in this country. Attempts are being made to improve the yield and hardiness of this plant through a national crop improvement program. What has complicated this effort is the existence of several different collections of cowpea seeds. (Oppong-Konadu E, Akromah I, and Adu-Dapaah O. 2005. African Crop Science Journal 13:117-123) 1. How would you use protein analysis via SDS-polyacrylamide gel electrophoresis to sort through these collections so that duplicates could be eliminated and the remaining specimens could be sorted into subgroups that could then be further studied for properties of value in crop improvement
Answer:
It is expected that accessions/lines that exhibit the same bands in SDS-PAGE are phylogenetically similar (or even identical, duplicated, accessions) and therefore they can be removed when developing a core collection of germplasm. Subsequently, the accessions of the core collection can be clustered into subgroups (subpopulations) based on the distances observed between lines, reflected by different protein band patterns observed in SDS-PAGE. It is expected that these subpopulations adequately contain the genetic diversity of the core collection (useful in breeding programs).
Explanation:
SDS-PAGE (sodium dodecyl sulphate–polyacrylamide gel electrophoresis), is a technique widely used in molecular biology to separate proteins based on their molecular weights. In crop improvement programs, this information can result useful to identify accession lines and develop core collections. A core collection is a limited set of lines or accessions/varieties obtained from a large germplasm collection that is expected to contain the genetic diversity of crop species. In this case, cowpea lines that exhibit the same bands in SDS - PAGE are expected to be phylogenetically similar (or even identical/duplicated accessions), thereby these lines can be removed in order to conserve one accession in the core collection. Subsequently, the remaining lines can be classified by a phenogram based on distance measures clustered by UPGMA (unweighted pair group method with arithmetic mean). This cluster analysis enables the construction of a phylogenetic tree from a distance matrix based on protein patterns in SDS-PAGE, thereby obtaining subpopulations (clusters) which will be useful in breeding programs.
Why did the accepted scientific theory of the solar system change from a geocentric model with Earth in the center to a heliocentric model with the Sun in the center?
Question 2 options:
A: Because over time the Sun's position changed
B: Because over time the Earth's position changed
C: New evidence and observations changed our understanding of the solar system
D: New planets formed in between the Sun and Earth
would it be better to mine in a wilderness area than a developed area?
Answer:
Yes.
Explanation:
Mining in a area of wilderness can provide great succes as long as you know the area well and know some things about where to mine and not.
Answer: Yes, it is better to mine in a wilderness area than a developed area.
Explanation: Mining is carried out to gather raw materials that serve as the foundation for any country's or region's growth. It is more likely to occur in a wilderness area than in a developed area because mining usually has a negative impact on the environment.
The ores recovered by mining, such as oil, coal, metals, and others, cannot be obtained from any developed location, and the mining process destroys settlements in developed areas.
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Limestone formation in caves is considered what kind of weathering? A.mechanic B.chemical C.biological D.hydraulic
Based on the figure above, _________ATP molecules are formed by fermentation.
a. 2 c. 36
b. 8 d. 38
Answer:
Hey!
The answer is:-
2 ATP molecules.PLEASE HELP !! ILL GIVE 40 POINTS ; PLUS BRAINLIEST !! DONT SKIP ANSWER.
Storage polysaccharides, like starch and glycogen, often contain over a million glucose units. The energetic cost of synthesizing polysaccharides is high (about one high-energy phosphate bond per sugar residue added). Suppose that in a liver cell, the glucosyl residues in large numbers of glycogen molecules were replaced with an equivalent number of molecules of free glucose. What problems would this cause for the liver cell
Answer:
Glucose present as monomers within the cell will exert more osmotic pressure than a single glycogen molecule, resulting in endosmosis and the lysing of cells.
Also, the presence of free glucose molecules will result in increase in weight of the liver due to lack of efficient packing as in glycogen as well as the association ofnthe glucose molecules with water molecules.
Explanation:
Glycogen is a polysaccharide composed of glucose monomer units linked to Each other by α-1,4-glycosidic binds. α-1,6-branches arises at about every 10th glucose residue in the straight chain. Thus animals more glucose molecules to be stored within a much smaller space, thereby incresing the bulkiness of glycogen. Glycogen molecules are insoluble in the aqueous medium of the cell because it doesn't have enough free polar groups to participate in hydrogen bonding with water and are stored as granules and therefore do not affect the water potential or osmotic balance of the cell.
On the other hand, glucose molecules are highly soluble in water because it has many free polar -OH grours that form hydrogen bonds with water. If the glucosyl residues in large numbers of glycogen molecules were replaced with an equivalent number of molecules of free glucose, the free glucose will exert a high osmotic pressure inside the cell, causing the entry of water in the cell by endosmosis resulting in swelling and lysis ofnthe cell. Also, the space occupied by these free glucose units within the cell will be much larger than that of glycogen whichmenables efficient packing ofthe glucose molecules.
According to the National Academy of Medicine, how much protein does the average American need daily?
Your answer:
o 10-15 grams
o 46-56 grams
o 20-30 grams
Clear answer
Which of the following is a difference between arteries and viens?
arteries carry blood and veins carry only plasma
arteries do not have valves and veins do have valves
arteries are thin and veins are thick
arteries carry blood back to the heart and veins carry blood to the heart
The correct option is :
=》arteries do not have valves and veins do have valves.
Arteries don't have valves because back flow of blood isn't possible due to high pressure, but blood in veins doesn't have high pressure just like arteries, so to stop backflow of blood, veins have valves.
cion
Fully explain how speciation occurred on the
Galapagos Islands using 3-4 complete
sentences.
PLEASE HELPP!!
What is the function of both the immune system and the endocrine system?
Answer:
The immune system is a host defence system that combines multiple mechanisms to protect an organism from several pathogens and the development of disease. The endocrine and immune system crosstalk and multiple immune processes are involved in endocrine diseases. Defects of immune tolerance associated with genetic and environmental factors result to the development of autoimmune diseases such as autoimmune thyroiditis and diabetes mellitus type 1. In addition, a mixture of immune cells and mediators is considered to be implicated in thyroid cancer development and progression. Multiple cytokines and the evolving inflammatory process are involved in the pathogenesis of insulin resistance and diabetes mellitus type 2 whereas immune mechanisms related to lymphocytes and cytokine circuits may play a role in the pathogenesis of osteoporosis. Several studies have recently been published regarding the therapeutic implications of immune system mechanisms on endocrine diseases. For complete coverage of all related areas
temperature usually increase when water condenses. which behavior of water is most directly responsible for this phenomenon?
Answer:
the release of heat by the formation of hydrogen bonds.
Explanation:
Temperature can be defined as a measure of the degree of coldness or hotness of a physical object. It is measured with a thermometer and its units are Celsius (°C), Kelvin (K) and Fahrenheit (°F).
Condensation can be defined as a process which typically involves the change in the physical state of matter from the gaseous phase into a liquid phase i.e water changing from gas (vapor in the air) into a liquid form.
Temperature usually increase when water condenses. This phenomenon is as a result of the release of heat (exothermic reaction) by the formation of hydrogen bonds in water i.e hydrogen-hydrogen bond in water molecules formed by the chemical elements; oxygen and hydrogen.
Why do silent mutations not affect the protein that the gene encodes?
Answer: Silent mutations occur when the change of a single DNA nucleotide within a protein-coding portion of a gene does not affect the sequence of amino acids that make up the gene's protein. ... And when the amino acids of a protein stay the same, researchers believed, so do its structure and function.