Biology Answers

How does DNA get copied into each of our cells and what happens if there is an error during this process

What happens when an electron permanently stays in a protein complex

Collection of abiotic and biotic factors in an environment

what would you expect to see in a serology when type AB plasma is mixed with the blood type A, B and O? Explain you answer.

Name different types of tumor-associated antigens. Are such antigens generally derived from proteins by mutated genes?

Which explanations accurately describe how cell structures interact in order to maintain homeostasis? Select all that apply.

The red fire ant is indigenous to South America. In recent years, this invasive species has become a pest for both humans and other ants in the southeastern United States due to their resource consumption and crop destruction.
What would be the safest way to reduce the impact of the non-native red fire ant while minimizing the impact on other organisms?

Could reverse Osmosis be used for water-based biological fluid filtration?

A damped mass-spring oscillator is subjected to a forcing F=F_0 cos⁡〖(ω_d t)〗. The steady-state solution is given by
x=A cos⁡〖(ω_d t-δ)〗,
where
A=A(ω_d )=(F_0/m)/√((ω_0^2-ω_d^2 )^2+(γω_d )^2 )
and
tan⁡δ=(γω_d)/(ω_0^2-ω_d^2 ).
The symbols have the usual meanings.
A sketch of the variation of amplitude versus driving frequency is shown in Figure 1:

Figure 1: Variation of amplitude with driving frequency
Explain why the amplitude is F_0/k when the driving frequency is zero and the type of forcing the system is subjected to.
Show that the frequency at which the amplitude attains a maximum is given by
ω_m=√(ω_0^2-γ^2/2)
and that the maximum amplitude is given by
A=A_0 Q/[1-1/(4Q^2 )]^(1/2)
where Q is the quality factor and A_0=F_0/k

You are investigating a murder of a young man who was paralyzed on his lower limbs due to an accident years ago. The autospsy report you received says that rigor mortis is observed on the lower part of body of this man. Comment on this report