Answer:
Ordinary people practice eugenics every day by following superstitions and making judgements about people or groups of people (whether they are conscious or not) and trying to "better" the human race in a number of ways. Examples of this are: superstition, racial profiling, the good ol boy system, institutionalization, population control, tattoos and piercings, and genetic enhancement
Explanation:
Primary consumers are the consumers that eat the producers directly. Other level consumers are eating other consumers to INdirectly eat the producer.
The female sex cells are ova. Eggs are released into the ovary every 28 days. They are wafted down the Fallopian tube by cilia (hairs). The uterus is where the fertilized egg can grow into a baby. It has strong uterine walls and a soft lining. The womb holds the baby in place during the pregnancy. The cervix opens into the vagina
The time it takes for 1g of strontium-90 to decay to 250 mg is; 57.6 years
<h3>What is the half life of an element?</h3>
The formula for half life is;
A(t) = A₀ * (¹/₂)^(t/t_1/2)
Where;
A(t) is amount left after t years
A₀ the initial quantity of the substance that will undergo decay;
t_1/2 is the half-life of the decaying quantity.
We are given;
t_1/2 = 28.8 years
A₀ = 1 g
A(t) = 250 mg = 0.25 g
Thus;
0.25 = 1 * (¹/₂)^(t/28.8)
log 0.25 = (t/28.8) log (1/2)
-0.60206 = (t/28.8) * -0.3010
t = 2 * 28.8
t = 57.6 years
Read more about half life at; brainly.com/question/11152793
