Which of the following might result in a human zygote with 45 chromosomes?
a) an error in either egg or sperm meiotic anaphase
b) failure of the egg nucleus to be fertilized by the sperm
c) fertilization of a 23 chromosome human egg by a 22 chromosome sperm of a closely related species
d) an error in the alignment of chromosomes on the metaphase plate
e) lack of chiasmata in prophase i

How does the molecular clock work? a. it analyzes the brain functionality of two different species.b. it examines and compares the physical characteristics of two different species.c. it illustrates relationships between two different species.d. it compares the number of mutations that exist in the dna of two different species.

Diagram of the evolution of land plants?

(select all the correct choose each statement that is scientific. - the opinions of randomly selected participants in a survey prove the idea that global temperatures are not increasing on earth. - the universe's average temperature and rate of expansion support the idea that it began as one super-dense and hot mass 13.8 billion years ago. - ocean tides are caused by the uneven gravitational pulls of the moon and sun on different parts of earth. - human life is more valuable than other forms of life on earth because humans are more intelligent than other organisms.