characteristics are shared by all living organisms?

When replication happens, how much of cell’s DNA will be replicated? Select one: a. All of it – all chromosomes in their entirety b. Only genes which are needed by that particular cell type c. Only genes which are being actively transcribed d. Only one member of each homologous pair of chromosomes

Melanin is a skin pigmentation that absorbs and dissipates broadband UV rays. Since UV radiation causes DNA damage, melanin pigments protect the skin and reduce the risk of cancer. When skin is exposed to sunlight, melanin production is increased, causing the skin to tan. This demonstrates that Select one: a. the environment causes mutations that have no effect on the chance of survival b. the expression of some genes is influenced by the environment c. the environment causes mutations that increase the chance of survival d. the environment causes mutations that have a large effect on the chance of survival

Bicoid is normally found at one end of a fly egg.  A defective form of bicoid results in an embryo with two tail ends.  If the normal form of bicoid was placed at both ends of an egg what would be the result? Group of answer choices A. a normal larva B. a fly with body parts in the wrong regions C. an embryo with two tail ends D. an egg with no cell division E. an embryo with two head ends