Answer:
leaf sizes vary
Explanation:
all leaves can never be the same
Answer:
Option B is correct
Explanation:
Given -
"Ability to taste the chemical phenylthiocarbamide" is autosomal dominant while its inability is recessive.
Autosomal dominant means that even if one l
Let the allele for dominant trait i.e "Ability to taste the chemical phenylthiocarbamide" be represented by "T"
and the allele for recessive trait i.e "Inability to taste the chemical phenylthiocarbamide" be represented by "t"
Genotype of a taster woman with a nontaster father is Tt
Genotype of a taster man who in a previous marriage had a nontaster daughter is also Tt
Tt * Tt
TT, Tt, Tt, tt
Therefore probability of being a taster is , and the probability of being a nontaster is
Probability that their first child will be a taster girl is equal to
Probability of being a taster Probability of being a girl
Thus, option B is correct
The first question would be E because DNA in the nucleus contains the instructions for making proteins, and the second question would be C
Answer:
Organ System
Explanation:
Each of the 11 organ systems in the body contribute to some manner to the survival of all its living cells. Some of the ways in which organ systems maintain the body's internal stability are by acquiring and distributing raw materials and nutrition; collecting and disposing of wastes and protecting the body from attack and injury..
Answer:
The action potential in an alpha motor neuron is propagated by saltatory conduction that, when it reaches the terminal bouton, causes a Ca2+ influx which leads to the fusing of acetylcholine-containing synaptic vesicles with the plasma membrane, and the release of said neurotransmitter in the neuromuscular junction. Acetylcholine activates the nicotinic receptors that open the sodium / potassium channel and causes the sarcolemma to reverse its polarity.
Depolarization will reach the sarcoplasmic reticulum and thanks to the T Tubules the potential for intracellular release of accumulated Ca2+ will be approximated. To make the concentration of this ion sufficient to produce the contraction there will also be an extracellular calcium entry through the Ca2+ channels. At this moment, the myosin-actin junction points are free and when binding occurs the contraction. When the moment of relaxation arrives, the links must be broken so that the muscle is not contracted. These bonds are broken thanks to the action of myosin as ATP, which breaks the bond by ATP hydrolysis. This process will be favored only when the Ca2+ decrease.