In chemistry class, Allen determined the effectiveness of various metals in releasing hydrogen gas from hydrochloric acid.  Several weeks later, Allen read that a utilities company was burying lead next to iron pipes to prevent rusting.  Allen hypothesized that less rusting would occur with the more active metals.  He placed the following into separate beakers of water:  1 iron nail,1 iron nail wrapped with an aluminum strip, 1 iron nail wrapped with a magnesium strip, 1 iron nail wrapped with a lead strip.  He used the same amount of water, equal amounts (mass) of metals, and the same type of iron nails.  At the end of 5 days, he rated the amount of rusting as small, moderate, or large.  He also recorded the color of the water. consistency:

observability:

Natural:

Predictably:

Testability:

Tentativeness:

plz help idk what to do for CONPTT

the answers are a and c

true skin; another name for the dermis. lies directly beneath the epidermis and is often referred to as the true skin. outermost layer of epidermis, consisting of dead cells.

we solve the problem using the hardy-wineberg equation.

let us start with the homozygous recessive proportion of individuals with sickle cell anaemia,

we have the proportion as q² = 0.25.

∴ q = 0.5 (frequency of hbs in population)

further,

solving for the frequency of normal cell by using the fact that,

p + q = 1

∴ p = 1 - 0.5 = 1 - 0.5 = 0.5

now we can calculate 2pq in p² + 2pq + q², which is the frequency for heterozygous carriers of sickle cell anaemia,

∴ 2pq = 2 x 0.5 x 0.5 = 0.5

and the homozygous normal cell individuals proportion is given by the expression,

∴ p² = 0.5² = 0.25

hence, the carriers for sickle cell anaemia are in proportion, 0.5, or 50%.