Biology Answers

The position of the particle as function of time is given by x(t) =5t^2-t^3 than find
a) the average velocity between t=1second and t=3second
b) the average acceleration between t=1second ft t=3s

Given that A=3i+5j-f7I B=2i+7j+k C=4i+6j+2k than find
a, A•B b, B×C c, A(A+C) d, A×(B+C)
e. a unit vector that is perpendicular to both vector in y-z plane.

In a human, polydactyly is autosome dominant disease. The blood groups of system ABO are determined by three allelic genes: i0, IA, IB. The blood groups of a human being are i0i0 - I(0); IAIA or IAi0 - II(A); IBIB or IBi0 - III(B); IAIB - IV(AB). In a family, a mother had I blood group and polydactyly, the father had IV blood group and normal structure of hand. There was born a child with first blood group and normal structure of hand. Determine the parental genotypes and the probability of a child with III blood group and polydactyly.

The human blood groups of ABO system are determined by three allelic genes: IA, IB, i0 . The combination of alleles i0 i0 determine the I(O) blood group, IA IA or IA i0 - II (A); IB IB or IB i0 - III (B); IA IB - IV (AB). In a family, in which mother has II blood group (heterozygote), her husband - I blood group. Determine the possible blood groups of their children.

Sickle cell anemia (S-anemia) and thalassemia are inherited as the incomplete autosome dominant characters. The genes of these diseases are non-linked. The heterozygous for S-anemia and thalassemia individuals do not have clinical symptoms. The carriers of S-anemia or thalassemia do not affect malaria. The diheterozygotes have crescent anemia. The homozygous for S-anemia and thalassemia individuals die in childhood. Determine the probability of the birth of healthy children in the family, in which one parent is heterozygous for both characters, and another is homozygous recessive.

Sickle cell anemia (S-anemia) is inherited as autosome incomplete dominant character. Homozygotes for dominant character die before puberty, the heterozygotes have subclinic anemia. The plasmodium can not use the S-hemoglobin and human with S-anemia has no malaria. What is the probability of the birth of children not stable to malaria, in a family, in which both parents are stable to malaria.

A hormone is any member of a class of signalling molecules produced by glands in multicellular
organisms that are transported by the circulatory system to target distant organs to regulate
physiology and behaviour. For each of the glands below, provide the name of the hormone
released, the chemical class, the representative action and symptoms experienced if there was an
undiagnosed disorder in the glands.
8.1 Posterior lobe of the pituitary gland (8 Marks)
8.2 Pineal gland

A visit to the neurologist always entails the knee-jerk reaction test as part of the examination.
Why?

How does the energy from light is made available in ATP molecules for the sunthesis of organic materials?

compare and contrast the circulatory systems of grasshoppers, fish and humans