A microscope was nessecary to observe cells.
Answer:
The Middle Image
Explanation:
A cast fossil preserves the impression of the hard parts of an organism, such as a shell or exoskeleton.
A trade of chromosome segments among non-sister homologous chromatids happens and is referred to as crossing over.
Crossover happens while chromosomes, usually homologous times of the equal chromosome, spoil after which reconnect however to the specific quit piece. If they spoil on the equal location or locus withinside the collection of base pairs, the end result is an trade of genes, referred to as genetic recombination.
<h3>What are homologous chromosome?</h3>
Homologous chromosomes are made from chromosome pairs of about the equal length, centromere position, and marking pattern, for genes with the equal corresponding loci.
Thus it s well expalined.
To leran more about the segments refer to link ;
brainly.com/question/795778
Answer:
flagella
Explanation:
The plasma membrane of some cells have extensions that have other functions, such as flagella to help a single-celled organism move or cilia to help keep our airways clear.
Water leaves through evaporation and returns through precipitation.
The answer is D.