Answer:
acetyl CoA
Explanation:
The break down of free fatty acid or fatty acid degradation is the process in which fatty acids are broken down into their basic metabolites. The process of degradation includes three steps:
1. Lipolysis of fat stores of and release of free fatty acids from adipose tissue
2. Process of activation and transport into mitochondria catalyzed by the enzyme fatty acyl-CoA synthetase.
3. β-oxidation-formation of final product - acetyl-CoA which is the entry molecule for the citric acid cycle.
Which bone is considered the longest bone in the human body?
The femur is the answer you are looking for.
A biology student is investigating tropisms in plants. The student observes the response of the roots of radish seedlings to a light source placed to the right of the roots. All of the roots grow away from the light source. Which of the following tropisms is the student MOST LIKELY investigating?
gravitropism
thigmotropism
hydrotropism
phototropism
Answer:
phototropism
Explanation:
The student was investigating phototropism.
The student wanted to know the response of the roots to light, that is why he exposed them to light.
Roots naturally exhibit two types of tropisms.
The first is gravitropism whereby they tend to grow downwards.
The second is hydrotropism whereby they grow towards the direction of water.
In the above experiment, no water was provided, the roots grew away from the light source but not specifically downwards.
How are microtubules thought to affect cell shape in plants? Microtubules of the plant cell cortex are thought to affect the movement of cellulose-synthesizing enzymes in the cell membrane, which, in turn, affect cell wall growth and shape. Microtubules of the plant cell vacuole are thought to affect the movement of cellulose-synthesizing enzymes in the cell membrane, which, in turn, affect cell wall growth and shape. Microtubules of the plant cell cortex are thought to affect the movement of lipid-synthesizing enzymes in the cell membrane, which, in turn, affect cell wall growth and shape. Microtubules of the plant cell wall are thought to affect the movement of cellulose-synthesizing enzymes in the cell membrane, which, in turn, affect cell wall growth and shape. 5. Microtubules of the plant cell nucleus are thought to affect the movement of cellulose-synthesizing enzymes in the cell membrane, which, in turn, affect cell wall growth and shape.
The correct answer is: Microtubules of the plant cell cortex are thought to affect the movement of cellulose-synthesizing enzymes in the cell membrane, which, in turn, affect cell wall growth and shape.
Plants have the ability to control the direction of cell expansion as a way of shaping growth. Microtubules are structures that help them to regulate the direction of growth. For example, transverse microtubules within the plant cell have the role to constrain the movement of cellulose synthase complexes that are essential for elongation growth.
Can recipients with blood type A or B receive a blood transfusion from a type O donor?
A) Yes, because type O blood has both anti-A and anti-B antibodies
B) Yes, because type O blood has neither A nor B antigens
the answer is A since O has both anti-bodies
Which of the following statements about xylem is incorrect?
A) It conducts material from root tips to leaves.
B) The conducting cells are part of the apoplast.
C) It transports mainly sugars and amino acids.
D) It typically has a lower water potential than is found in soil.
E) No energy input is required for transport.
The incorrect statement is: C) It transports mainly sugars and amino acids.
Xylem together with floem is a plant tissue involved in the transport of substances through the plant.
Xylem’s role is to transport water (sometimes and nutrients) from roots to stems and leaves and to provide support to the plant. Xylem consists of a specialized, water-conducting cells - tracheary elements (tracheids and vessel) which are long, narrow and hollow.
Today, it's widely accepted that all of the two-legged meat-eating dinosaurs known as theropods— including t. rex and albertosaurus—had at least very simple fuzzy feathers covering their bodies. according to the tree you built, what distinguishes the feathers of modern birds and archaeopteryx from the feathers of other theropods?
Answer:
I got this question to its actually shaft
Which of the following has the MOST similarity in nucleotide sequence?A. sister chromatidsB. complementary strands of DNAC. homologous chromosomesD. nonhomologous chromosomesE. maternal and paternal copies of the same chromosome
B because you can get DNA from people
An organism that feeds on the body fluids or tissues of another organism, but does not kill it, is called a ____
It’s call a predator
Answer:
It's a parasite, that other comment is so wrong.
Explanation:
Which of the following is the correct sequence of blood flow in reptiles and mammals?
A) left ventricle --> aorta --> lungs --> systemic circulation
B) right ventricle --> pulmonary vein --> pulmocutaneous circulation
C) pulmonary vein --> left atrium --> left ventricle --> pulmonary circuit
D) vena cava --> right atrium --> right ventricle --> pulmonary circuit
E) right atrium --> pulmonary artery --> left atrium --> ventricle
Answer:
D) vena cava --> right atrium --> right ventricle --> pulmonary circuit
Explanation:
The pulmonary circulation is part of circulatory system which carries deoxygenated blood from the right ventricle of the heart, to the lungs, and then returns oxygenated blood from the lungs to the left atrium of the heart.
Vena cava brings deoxygenated blood to the right side of the heart-right atrium. From the right atrium, the blood is pumped through the tricuspid valve into right ventricle. Deoxygenated blood then leaves the heart from the right ventricle through the pulmonary artery. The pulmonary artery carries deoxygenated blood to the lungs, where carbon dioxide is released and oxygen is picked up during respiration (blood becomes oxygenated). The oxygenated blood leaves the lungs through pulmonary veins to the left atrium of the heart.
The correct sequence of blood flow in both reptiles and mammals starts from the vena cava moves to the right atrium then to the right ventricle and finally to the pulmonary circuit for oxygenation in the lungs.
Explanation:The correct sequence of blood flow in both reptiles and mammals is represented by option D: vena cava --> right atrium --> right ventricle --> pulmonary circuit.
This is because the blood, first carrying waste materials like carbon dioxide returns to the heart via the vena cava and enters the right atrium. It then passes into the right ventricle, which pumps the blood to the lungs via the pulmonary circuit (arteries). In the lungs gas exchange occurs where oxygen is absorbed and carbon dioxide is released. Oxygenated blood then returns to the heart ready to be circulated throughout the body.
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PLEASE HELP ME- 20 points
Use the chart below to answer the question.
Which student correctly compared the outcomes of meiosis and mitosis?
should be student 3. As in meiosis four haploid daughter cells are formed. As meiosis is the type of nuclear division that halves the chromosome number.
Student 3 correctly compared the outcomes of meiosis and mitosis.
What do you mean by Meiosis?Meiosis may be defined as a type of cell division that produces four haploid cells from a parental cell. It is also known as reductional division.
Mitosis produces two daughter cells that are diploid in nature while meiosis produces four daughter cells that are haploid in nature.
Therefore, Student 3 correctly compared the outcomes of meiosis and mitosis.
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A potassium-40 sample starts with 50 atoms, and 1.25 billion years later, there are 25 atoms. What is the half life of potassium-40?
A. 25 years
B. 40 years
C. 1.25 years
D. 2.5 years
Potassium-40 has a half life of 1.25 billion years.
Explanation;New amount = Original amount × (1/2)^n ; where n is the number of half lives.
Original amount is 50 atoms
New amount is 25 atoms
Therefore;
25 = 50 × (1/2)^n
1/2 = (1/2)^n
Thus; n = 1
n = 1 which is equivalent to 1.25 billion years
Therefore;
Potassium-40 has a half life of 1.25 billion years.
Answer:
C
Explanation:
Which one of the following most closely approximates the number of replicons in a human focus of replication?a. 1b. 50c. 100d. 300e. 30 000
The answer is:
E. 30,000
Since a replicon is known as the amount of DNA which is replicated from a single ori. Since bacteria only have one ori, they only have one replicon. The human genome has approximately 30,000 ori, so there will also be 30,000 replicons in a human focus.
Which structure aids sarcodine protists in movement and feeding?
a. chlorophyll
b.flagella
c.pseudopods
d.cilia
Answer:
This is really late but to anyone else who needs the answer: the answer is PSEUDOPODS. They are a foot that provides movement and ingests food.
Explanation:
What is an ADVANTAGE of sexual reproduction?
A) Two parents are required
B) One parent is required
C) It leads to genetically diverse offspring
D) It leads to genetically identical offspring
C) It leads to genetically diverse offspring is your answer.
Genetic diversity allows the passing down of traits that are likely to increase chances of survival, such as immunity to certain diseases. However, genetic diversity cannot be confused with evolution, as evolution can only lead to deterioration of the being, rather then adaptability & survivability.
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Which of the following statements about the smooth endoplasmic reticulum is/are correct?
Liver cells are abundant in SER.
The testes and ovaries are tissue types whose cells are abundant in SER.
The SER is the primary location for synthesis of membrane-bound proteins.
Cholesterol is made in the SER.
The luminal face of the SER is the main site at which membrane lipids are synthesized.
Phospholipids are synthesized from cytosolic water soluble precursor molecules.
Flippases are the enzymes that allow lateral movement of a lipid within a leaflet.
Answer:
Liver cells are abundant in SER. The testes and ovaries are tissue types whose cells are abundant in SER.Cholesterol is made in the SER. Phospholipids are synthesized from cytosolic water soluble precursor molecules.Explanation:
This is because liver cells contain enzymes that metabolize various lipid-soluble compounds.
This is because testes and ovaries produce steroid hormones (cholesterol is the precursor for their synthesis).
ER is the organelle at which all membrane lipids are synthesized.
Phospholipids are the main lipids that are the main structural components of the cell membrane. They are synthesized on the cytosolic side of the ER membrane, from water-soluble cytosolic precursors.
Humid tropical climate regions are located _____.
By the equator and between the Tropic of Cancer and the TrOpic of Capricorn
Answer:
In the region(near to the equator) lying between Topic of Capricorn and Tropic of cancer.
Explanation:
Humid tropical climate regions are located near to the equator. These regions are located between the Topic of Capricorn and Tropic of cancer. The latitude for this region ranges between 10 degrees of south to 25 degrees of north.
For example – Humid tropical rain forest are found in East Indies, Amazon Basin and Equatorial Africa (Congo Basin).
What area of the brain experiences rapid growth of synapses and subsequent elimination of those synapses that are not used often during adolescence?
The correct answer is: prefrontal cortex
Synaptogenesis or formation of synapses begins about the 23rd week of gestation. The peak of synapse production is achieved at different periods. The massive overproduction of synapses that occurs in early childhood is followed by a gradual reduction of them also known as "synaptic pruning". “Synaptic pruning” happens during childhood, and during adolescence.
The brain continues to grow and develop, but the overall number of neurons and synapses are reduced by up to 50%. This is process that is experience driven: unnecessary neuronal structures are removed and replaced by more complex and efficient structures, that are more required to the demands of adulthood.
Although fats are an important component of a healthy diet, overconsumption of some types of fats may cause heart disease. Which fats are considered to be heart-healthy? A. saturated fats B. unsaturated fats C. trans fats D. cholesterol
B- unsaturated fats
because it reduces cholesterol levels.
Answer:
B. unsaturated fats
Explanation:
Unsaturated fats have one or more double bonds in their structure. The unsaturated fats are considered good for the heart as they serve to reduce the blood cholesterol level.
The higher blood cholesterol level can cause many cardiovascular disorders. By lowering down its blood level, unsaturated fats allow the heart to stay healthy.
CO2 enters and O2 escapes from a leaf via.
A) stomata.
B) grana.
C) thylakoids.
D) stroma.
Answer is A, stomata.
The correct answer is stomata. These are tiny openings in the leaves that allow for the intake of CO2 for photosynthesis and the release of O2, the byproduct of the process.
Explanation:The correct answer to this question is A) stomata. Stomata are tiny openings or pores found on the surface of leaves that control gas exchange. They allow the carbon dioxide (CO2) to enter into the leaf, which is a necessary component for photosynthesis, and permit the escape of oxygen (O2), a byproduct of photosynthesis. Options B) grana, C) thylakoids, and D) stroma are all components of a leaf's chloroplasts and are involved in photosynthesis, but not in gas exchange directly.
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A dog that has been trained to salivate at the sound of a bell is an example of _[blank]_.
conditioning
innate behavior
habituation
survival behavior
Conditioning
Explanation;This was an example of classical conditioning. Classical conditioning is when two stimuli are linked together to produce a new learned response in a person or an animal. An experiment done by Pavlov demonstrated classical conditioning in dogs. Such that; there was a neutral stimulus (the bell), which by itself will not produce a response, like salivation and also there was a non-neutral or unconditioned stimulus (the food), which will produce an unconditioned response.why are fertilizers so bad? List how fertilizers are making their way from land to the ocean
The ferilizers could polute the ocean through erosion?
Fertilizer can reach the ocean through the process run off in the water cycle
Which of the following is not a characteristic shared by all chordates?
fins
hollow nerve chord
pharyngeal pouches
notochord
Fins
Fins are not a characteristic of all chordates
Explanation;All Chordates share four key features, which includes; a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post tail.The notochord provides skeletal support, gives the phylum its name, and develops into the vertebral column in vertebrates. The dorsal hollow nerve cord develops into the central nervous system: the brain and spine. Pharyngeal slits are openings in the pharynx that develop into gill arches in bony fish and into the jaw and inner ear in terrestrial animals. The post tail is a skeletal extension of the posterior end of the body, being absent in humans and apes, although present during embryonic development.The characteristic that is not shared by all chordates is 'fins'. While fins are seen in certain subgroups of chordates, not all chordates possess them. The three main features common to all chordates are a hollow nerve chord, pharyngeal pouches, and a notochord.
Explanation:The characteristic that is not shared by all chordates is fins. The chordates, which include vertebrates, have three main defining features: a hollow nerve chord, pharyngeal pouches, and a notochord. However, not all chordates have fins. For instance, chordates like mammals and birds do not possess fins, but they do have the other three common features.
Fins are typically seen in aquatic or semi-aquatic species such as fish, but they are not a necessity for all chordates. Fins are used for movement, balance, and steering in an aquatic environment, but they are not a feature shared universally by chordates. Thus, while fins are common in certain subgroups of chordates, they are not a characteristic shared by all.
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Respiration is a process during which energy is released from glucose. This energy is used for processes such as growth of the body.
the answer is
photosynthesis
Classify Is blood classified as a cell, a tissue, an organ, or an organ system? Explain the classification.
its a cell because blood is made from red blood cells
According to the BiomeViewer, Mt St Helens/Spirit Lake is in a __________ biome
Temperate Coniferous Forest
Temperate Deciduous Forest
Boreal Forest
Tundra
The answer is Temperate Coniferous Forest. Hope this helps!
Answer:
Mt St Helen’s Lake is an example of Temperate Coniferous Forest.
So correct answer is option A.
Explanation:
It is located in Washington DC in USA. The Mt St Helen’s Lake is also called Spirit lake. It is actually a volcanic lake, formed on the crater of Mt St Helen. It is situated in the temperate region. So the vegetation is of temperate region.
Being a mountainous region, there’s no deciduous trees. Whereas, conifers occupy the region, leading to a temperate coniferous vegetation.
which of the following particles is the fundamental unit of all matter, both living and nonliving ?
a)neuron
b)electron
c)atom
d)cell
Answer:
c)atom
Hope this answer correct :)
The fundamental unit of all matter is the atom, consisting of protons, neutrons, and electrons. Cells are the smallest units of life but not the fundamental unit of all matter. Electrons are fundamental subatomic particles known as leptons.
The fundamental unit of all matter, both living and nonliving, is the atom. Atoms are the basic building blocks of matter and consist of three main components: protons (positively charged), neutrons (neutral charge), and electrons (negatively charged). While cells are the basic building blocks of life, it is atoms that make up cells and everything else in the universe. Protons and neutrons form the atom's nucleus, which has a positive charge because of the protons. The electrons move around this nucleus in the electron cloud, attracted by the positive charge.
It's important to note that while cells are indeed the smallest independently functioning biological units in an organism, they are not the fundamental unit of all matter. Additionally, the electron is an example of a fundamental subatomic particle, specifically a lepton, which is different from the composite particles like neutrons that contain quarks.
Which of the following chemical reactions proves the fact that the products of photosynthesis are reactants of respiration? A. Photosynthesis: Respiration: B. Photosynthesis: Respiration: C. Photosynthesis: Respiration:
The correct answer is is A.
In the process of photosynthesis the chemical reaction involves water and carbon dioxide whereby the light is present.
We have 6H2O + 6Co2⇄ 6O2 + C6H12O6.
The oxygen product is being used by all living things to act as a reactant i the process of respiration.
Answer:
Explanation:
The answer is:Photosynthesis: 6 CO₂ + 6 H₂O → C₆H₁₂O₆ + 6 O₂Respiration: C₆H₁₂O₆ + 6 O₂ → 6 CO₂ + 6 H₂O + ATPCellular respiration and photosynthesis are
complement reactions to each other. These are reverse reactions. In
cellular respiration glucose (C₆H₁₂O₆) and oxygen (O₂) yield carbon dioxide (CO₂) and water (H₂O) and energy is released in the form of ATP. In the opposite
reaction - in photosynthesis, carbon dioxide (CO₂) and water (H₂O) yield glucose (C₆H₁₂O₆) and
oxygen (O₂).
which characteristic do plants, people and flatworms share?
A). They exchange gases with the environment
B). They all have digestive systems that break down food
C). They all undergo photosynthesis
D). They all use a muscular system for movement
Answer: Option A
Explanation: Plants, flatworm and people share the similar characteristics as they exchange gases with the environment.
The exchange of gases from the environment takes place differently in different types of organisms.
In case of flatworm it takes place through its skin, plants exchange gases through their leaves and animals respire through lungs.
The common character shared by all the three organism is exchange of gases.
Depends on organisms passing genes to the next generation. Why do organisms resemble those from long ago?
Evolution takes a very long time and so the genes won't be completely different
Which of the following combinations correctly matches a phylum to its description?
a. echinodermata - bilateral symmetry as a larva, water vascular system
b. nematoda - segmented worms, closed circulatory
c. cnidaria - flatworms, gastrovascular cavity, acoelomate
d. platyhelminthes - radial symmetry, polyp and medusa body forms
The answer is B
The phylum Nematoda (roundworms) is one of the most common phyla.
There more than 15,000 known species of roundworms, however, there are many thousands of individual varieties nematodes, as well.
The study of animals is called zoology.
The correct answer to the question is option B which is Echinodermata – bilateral symmetry as a larva, water vascular system.
What is bilateral symmetry?When a species has two equal halves when it cut through the specific plane is called bilateral symmetry.According to the question, the Echinodermata has bilateral symmetry and consists of a water vascular system that helps to move in any direction.
An example of the Echinodermata is starfish.
Hence, the correct answer to the question is option B.
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