A model organism is a species that has been widely studied to understand a particular biological phenomena, normally used because they are easy to breed and maintain in a laboratory setting and has certain experimental advantage.
The criteria that Thomas hunt Morgan was looking for include; the model organism should be small in size, easy to keep in the laboratory and also able to produce large number of off springs in a short time.
Oxygen respiratory more energy products cellular system
Answer:
C. Humans use petroleum, which is a nonrenewable resource, to make gasoline for cars
Explanation:
a. humans use sand, which is a nonrenewable resource to make glass -
<em>It's a renewable source</em>
b. Humans use coal, which is a renewable resource, to make charcoal for BBQ grills.
<em>It's a nonrenewable source</em>
<span>Let's consider a scenario in which the resting membrane potential changes from −70 mV to +70 mV, but the concentrations of all ions in the intracellular and extracellular fluids are unchanged. Predict how this change in membrane potential affects the movement of Na+. The electrical gradient for Na+ would tend to move Na+ Outside the cell (extracellular) while the chemical gradient for Na+ would tend to move Na+ Inside the cell (intracellular).
The electrical gradient is defined as the + goes to the - and the - goes to the +
Na + has a positive charge, but there's more positive charge inside the cell than outside (due to potassium), therefore, Na+ goes extracellular (out)
The concentration gradient considers that the ion will go from the most concentrated to at least concentrated by passive diffusion so no trans-membrane proteins in the game attention.Na + is very concentrated in extracellular and few intracellular, therefore, it tends to go intracellular (in).</span>
As parent's genotypes are missing here, alleles cannot be estimated in offspring, but it is possible to use the example above to estimate it.
<h3>What is a Punnett square?</h3>
A Punnett square is a diagram used in genetics to estimate genotypic and phenotypic frequencies in offspring from a given genetic cross.
In order to estimate offspring allele frequencies, we need to know parental genotypes by means of a Punnett square.
For example, if both parents are heterozygous for a gene whose alleles are called 'A' and 'a', the Punnett square in offspring is:
A a
A AA Aa
a Aa aa
In this case, 50% of offspring will be heterozygous (genotype 1/2 Aa), whereas 25% will be homo-zygous dominant (1/4 AA) and 25% will be homo-zygous recessive (1/4 aa).
In conclusion, as parent's genotypes are missing here, thereby alleles cannot be estimated in offspring, but you can use the example above to estimate it.
Learn more about the Punnett square here:
brainly.com/question/3522181
#SPJ1