Answer:
Purple flowers
Explanation:
Usually the dominant allele is a capital letter.
From the question, purple flowers are dominant to white flowers while white are recessive.
PP = Purple
pp = White
Answer: The correct option is B.
Explanation: This is an example of radioactive decay and all the radioactive decay processes follow First order of kinetics.
Expression for the half life of first order kinetics is:
We are given:
Putting in above equation, we get:
Expression to calculate the amount of sample which is unchanged is:
where,
N = Amount left after time t
= Initial amount
k = Rate constant
t = time period
Putting value of k = 0.05625 and t = 24.6 in above equation, we get:
The above fraction is the amount of sample unchanged and that is equal to 
Hence, the correct option is B.
Answer:
1728 kg is the mass of air for the room
Explanation:
An exercise of unit conversion.
The volume of the room will be:
24 m . 15 m . 4m = 1440 m³
Density of air is 1.20 g/L which means that in 1L, there is contained 1.20 g of air.
1L = 1dm³
1m³ = 1000 dm³
1440 m³ . 1000 = 1440000 dm³ ⇒ 1.44x10⁶ L
Density of air = 1.20 g/L = mass of air / volume of air
1.20 g/L = mass of air / 1.44x10⁶ L
1.20 g/L . 1.44x10⁶ L = mass of air → 1728000 grams
1 g = 1x10⁻³ kg
1728000 g / 1000 = 1728 kg
Answer:
<u>D. a new substance is formed</u>.
Explanation: "Chemical reactions involve combining different substances. The chemical reaction produces a new substance with new and different physical and chemical properties. Matter is never destroyed or created in chemical reactions. The particles of one substance are rearranged to form a new substance." B. and C. are two different effects of chemical reaction, but not for all. Hope this helps ^-^.
B. DNA is used as a template to make RNA. Is part of the central dogma.
