Answer:
Larva with two anterior region
Explanation:
The maternal effect genes are involved in the development of anterior-posterior axis in Drosophila. There are 50 maternal effect genes but only four genes of these are involved in maintaining gradient along the axis. These are Hunchback, Bicoid, Caudal and Nanos.
The Hunchback and Bicoid regulates the development of anterior axis in Drosophila. The Caudal and Nanos regulates the Posterior axis development in Drosophila.
The products of hunchback and bicoid mRNA are required for development of head and thorax. The proteins coded by nanos and caudal are required for abdominal segments. The embryo that lacks nanos do not develop posterior axis. The early embryo injected with Bicoid protein into the posterior region will develop two anterior region.
Answer: Massive and Supermassive stars
Answer:
Option A
Explanation:
In a physical change, physical characteristics such as shape, mass, volume, state, phase etc. changes while in a chemical change one substance convert into entirely different substance which may or may not be converted to its original form. Of all the given options, option A represents a physical change. In option A the phase of the substance has changed from solid to gas.
