If scientists identify an animal with bilateral symmetry and no segmentation, which phylum can it definitely not belong to?
a. mollusks
b. roundworms
c. flatworms
d. annelids

What is any method of measuring the age of an object or event in years, such as using atomic half-life?

Which of the following is the smallest unit that would contain a complete copy of the entire human genome? a) one human somatic cell b) one human chromosome c) all of the dna of one human d) one human gene

Which statement is true for all sexually reproducing plants and animals? the process of mitosis produces gametes. the process of mitosis always produces diploid cells. the process of meiosis produces gametes. the process of meiosis produces haploid cells. the process of meiosis produces diploid cells.