The X can possibly be the sex chromosome. Like for human female we have the XX chromosomes and when the allele is on the X chromosome we write as X with a R as the superscript on top right.
Answer:
False
Explanation:
Even though the idea is logical, Earth's seasons are actually caused by the tilt of earth,earth rotating on it's axis, and Earth's revolution around the sun
hope this helps!
The scientific theory contains many steps. It could also be known as a hypothesis. Hope this is helpful
<span>D. Lancelet, are examples of an invertebrate chordate:)</span>
