Which name is given to the observable features of an organism ?
a) Alleles.
b) Genes.
c) Genotype.
d) Phenotype.

D. Phenotype

Explanation:

Phenotypes are observable characteristics of an organism, like seeing that a human has brown hair, freckles, etc.

Hope this helps :)

a chair, a bed, and a toothbrush

explanation:

i was told this before by a teacher, so yeah

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.