The pedigree chart represents three generations. Red family members have a disease that is caused by an autosomal dominant gene. Consider the chart. The father in Generation I must have what genotype? D represents the allele for the disease; d the allele for normal. A) DD B) Dd C) XDYD D) XDYd

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.

x would be the most and the least would be y because there are more fruit   and seeds than flock z has insects

bru what tyep of qus is dis

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.