A baby isn't considered a fetus until about 8 to 9 weeks after
conception. During those first weeks, the baby is considered as the
embryo. The embryo is the development of the pregnancy until about 9
weeks, it will then turn into a fetus.
I would <em>PROBABLY</em> say C; Method A is radiation and Method B is conduction. My reason for that is because Method B sounds a lot like conduction to me and Method A sounds like it COULD be radiation? I'm sorry if this is wrong, it just seems like the best choice in my opinion!
The mass of a star can be determined by studying D) binary star systems.
Although there may be other ways to determine the mass of a star, this is the most common one which is widely used all over the world when it comes to measuring objects in the universe.
Natural selection refers to the phenomenon by which the species in a population possessing the tendency to get adapted in a condition enhance in numbers in comparison to those who exhibit fewer adaptation capacities over a number of generations.
In other words, it can be stated as the non-random and differential development of distinct genotypes function to sustain favorable variant and to eradicate less favorable variants. Some of the conditions are required for the process of natural selection to take place.
These are heredity, reproduction, variation in individual characters, and variation in the fitness of organisms among the members of the population. If the conditions are met, then the phenomenon of natural selection occurs by default.
