a. True.
There are 3 main types of blood vessels.
Arteries that take blood away from the heart. Veins that carry blood from capillaries back to the heart. Capillaries which are responsible for the exchange of materials between blood and other tissues.
Hope this helps.
B) 3.0
The mechanical advantage of the ramp is 3.6
/1.2 or 3.0. MA of a ramp is length/height.
Answer:
97%
Explanation:
PKU is caused by a recessive mutation, which means that affected individuals are homozygous and recessive (<em>tt</em>).
<u>The frequency of genotypes according to Hardy-Weinberg equilibrium is:</u>

where p is the frequency of the <em>T</em> allele and q is the frequency of the <em>t</em> allele.
Affected individuals are 1 in 4500, which means the frequency of <em>tt </em>genotype is 1/4500.
If the population is in Hardy-Weinberg equilibrium,

The sum of the allele frequencies adds up to 1, therefore:
p + q = 1
p= 1 - q
p= 1 - 0.015
p= 0.985
The frequency of the TT genotype (homozygous wild-type individuals) will be:

97% of the population will have the homozygous wild-type TT genotype.
Answer:
In its astrobiology roadmap, NASA has defined the principal habitability criteria as "extended regions of liquid water, conditions favorable for the assembly of complex organic molecules, and energy sources to sustain metabolism".
Explanation: