Phospholipids are the class of lipids that is composed of a hydrophilic head and two hydrophilic tails derived from fatty acids that are joined with an alcohol residue.
They are the main element of the cell membrane and coordinate cellular processes.
Examples of phospholipids are phosphatidylserine and phosphatidylcholine.
The phospholipids are formed of two layers to support the framework of the membrane.
The double membrane of the phospholipid has a water-loving head at the outer side, while the water-fearing tail is away from the water molecule and are located inside of the structure.
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Answer:
Because phospholipids have 2 parts. One is hydrophilic, the other is hydrophobic, so when it wants to survive , it has to be 2 layer, hydrophilic parts are the outside parts.
As an arthropod gets bigger and grows, its exoskeleton gets bigger and grows as well. True False
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that is true the exoskeleton grows as well.
that answer is true for the statement provided
A fox sees a piece of carrion being thrown from a hawk's nest and rushes to snatch it. The nest is 14.0 m high, and the carrion is thrown with a horizontal velocity of 1.5 m/s. The fox is 7.0 m from the base of the tree. What is the magnitude of the fox's average velocity if it grabs the carrion in its mouth just as it touches the ground? (Assume no air resistance and that ay = g = 9.81 m/s2.)
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vertical d = 1/2 gt±² 14.0 = 0.5(9.81)t² t² = 14.0/(0.5)(9.81) t² = 2,85 t = 1.69 sec
horizontal distance traveled by carrion in t = 1.69 sec d = vt d = (1.5)(1.69) d = 2.53 m
fox must travel horizontally = (7.0 - 2.5) = 4.5 m in t = 1.69 sec. fox speed (avg) = 4.5/1.69 = 2.7 m/s to catch carrion ANS
What structures protect the brain and spinal cord
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Skeletal structures or Bones
The skull protects the brain while vertebrae protect the spinal cord.
How is most DNA duplication is the body accomplished?
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most DNA duplicate through a process called mitosis
DNA carries the information for making all of the cell's proteins.These proteins implement all of the functions of a living organism anddetermine the organism's characteristics. When the cell reproduces, ithas to pass all of this information on to the daughter cells.Before a cell can reproduce, it must first replicate,or make a copy of, its DNA. Where DNA replication occurs depends uponwhether the cells is a prokaryote or a eukaryote (see the RNA sidebar onthe previous page for more about the types of cells). DNA replicationoccurs in the cytoplasm of prokaryotes and in the nucleus of eukaryotes.Regardless of where DNA replication occurs, the basic process is thesame.The structure of DNA lends itself easily to DNA replication. Each side of the double helix runs in opposite (anti-parallel)directions. The beauty of this structure is that it can unzip down themiddle and each side can serve as a pattern or template for the otherside (called semi-conservative replication). However, DNA does not unzip entirely. It unzips in a small area called a replication fork, which then moves down the entire length of the molecule.Let's look at the details:An enzyme called DNA gyrase makes a nick in the double helix and each side separatesAn enzyme called helicase unwinds the double-stranded DNASeveral small proteins called single strand binding proteins (SSB) temporarily bind to each side and keep them separatedAn enzyme complex called DNA polymerase"walks" down the DNA strands and adds new nucleotides to each strand.The nucleotides pair with the complementary nucleotides on the existingstand (A with T, G with C).A subunit of the DNA polymerase proofreads the new DNAAn enzyme called DNA ligase seals up the fragments into one long continuous strandThe new copies automatically wind up again
What events influenced the growth of the environmental movement in the united states
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The events that might triggered the to do more environmental movements include the effects of DDT on the environment and a river in Ohio was on fire because of the pollution present. It is a good thing though because, in the end, everything we do to the environment will have and will always have an effect on us living in this planet.
A lack of some basic biological requirement such as water, which produces a drive to obtain that requirement, is known as the?
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Drive reduction approach to motivation, this theory states that when an individual has been deprived of biological resources such as energy, water or sleep, others. They tend to result to impulse or drive. These basic needs arise an action to obtain this need is required.