The scale reads 3 so it is displacing 5 kg of water
find volume of rock using volume of water it displaces:
volume of rock = 5 kg(m^3 / 1000 kg) = .005 m^3
mass of rock = 8 kg
density = 8 / 0.005 (kg/m^3)
1600 Kg/ m^3
Answer:
14 chromosomes
Explanation:
In the gametes of an organism, there are always half of how many chromosomes there are in the somatic cells of the organism. For example, if there are 4 chromosomes in the somatic cells, that means that there are 2 chromosomes in the gametes.
Somatic cells are body cells. They include everything from skin cells to brain cells to stomach cells.
Gametes are reproductive cells. They're the sperm and egg cells.
So if the muscle cells have 28 chromosomes, that means all somatic (or body) cells of that organism have 28 chromosomes.
So the gametes would have half of that amount:
28/2 = 14
So the sperm cells of this organism would have 14 chromosomes.
Answer:
Enzymes' shapes are important because it determines the specific substrate it will act onto.
Explanation:
The shape of the enzymes are explained by two theories, which are Lock and Key Theory and Induced Fit Theory.
<h3>Lock and Key Theory </h3>
This was first coined by <em>Emil Fischer in 1894</em>. Just like how a key has a specific keyhole, <u>enzymes' active sites are supposed to act on specific substrates to produce a catalyzed effect</u>. Incorrectly shaped keys or enzymes will not fit into a lock (substrate) not assigned for it.
<h3>
Induced Fit Theory</h3>
this theory was proposed for the substrates that do not qualify for the Lock-and-Key theory, or <u>enzymes that have more than one active sites</u>. It is said that the <u>substrate determines the final shape of the enzyme</u>, and that the<u> enzyme is somehow pliable</u>. The enzyme is then modified by the substrate to form an enzyme-substrate complex. This explains why two or more enzymes can catalyze a single substrate.
<h3>Additional notes:</h3>
For enzymes to work, they may need specific molecules.
A coenzyme may be <u>metal ions (iron, copper, magnesium)</u> or <u>organic molecules (Vitamins B2, B3, B8)</u> which attach to an enzyme to form a holoenzyme. An apoenzyme is an enzyme with only its protein part sans the cofactor.
Selective breeding and <span>natural selection are similar because they are both giving certain traits to offspring.
DIFFERENCE:
</span>natural selection-Process by which individuals that are better suited to their environment survive and reproduce most successfully; also called survival of the fittest
selective breeding-Selection by humans for breeding of useful traits from the natural variation among different organisms
The gate control theory of pain states that the experience of pain is dependent on the complex interaction of the central and the peripheral nervous system. This theory was given by Ronald Melzack and Patrick Wall.
Usually, when a person experiences pain, the neurons transmits the message from the area of damage along the peripheral nervous system to the spinal cord and the brain. The gate control theory suggests that the neurons encounter the 'nerve gates' while transmitting the pain messages in the spinal cord. These opening and closing of these gates is dependent on the multiple factors.
The basket cells are the multipolar, inhibitory interneurons . Endorphins are the neuropeptide and the peptide hormones, which are secreted by the central nervous system and the pituitary gland. These structures have no relation with the transmission of the pain.
The hyperpolarization of the neurons by the opiate receptors resulting in the release of the substance P, which is a neurotransmitter involved with pain.
Hence, the correct answer is 'by releasing substance P'.
