The cell membrane is selectively permeable, allowing only certain substances to pass through. Passive transport is a way that small molecules or ions move across the cell membrane without input of energy by the cell. The three main kinds of passive transport are diffusion, osmosis, and facilitated diffusion.
False. Fertility rate refers to the number of children who would be born to hypothetical females (or per 1000 females) over their whole reproductive life.
Answer:
the answer would be d. tt
Explanation:
The stroop effect is a phenomenon in which you must say the color of a word but not the name of the word. The effect was first described during the 1930's by American psychologist John Ridley stroop for whom the phenomenon is named.
Answer:
D. The frequency of the Ellis-van Creveld allele is 0.0447 in the isolated population and 0.0026 in the general population, which suggests that genetic drift has occurred in the isolated population.
Explanation:
If we assume that one gene is involved in Ellis-van Creveld syndrome and we name that gene with A, then the genotype of the syndrome would be aa.
In population 1, the frequency of the syndrome is 1/150000=0.0000066(it is the frequency of the aa gentotype)
In population 2, the frequency of the syndrome is 1/500=0.002
According to Hardy-Weinberg equilibrium
p2+2pq+q2=1 (p2 is the frequency of the dominant homozygous, 2pq is the frequency of heterozygous and q2 is the frequency of the recessive homozygous).
q or the frequency of the Ellis-van Creveld allele in Population 1 is
=0.0026
q or the frequency of the Ellis-van Creveld allele in Population 2 is
= 0.0447