Which cells create the feeding current in a sponge?

1.amoebocytes
2.choanocytes
3.mesohyl cells
4.pinacocytes
2

Biology & Microbiology

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Viruses simultaneously contain DNA, RNA, and protein

Indicate whether this statement is true or false.

Biology & Microbiology

Which of the following is correct regarding the blind spot?

A. It's an area of the retina where rods and cones are concentrated. B. It's caused by a nontransparent area on the cornea. C. It's an area of the retina where there are no rods or cones. D. It's caused by a nontransparent area on the lens.

Biology & Microbiology

Biologists now routinely test for homology between genes in different species. If genes are determined to be homologous, it means that they are related _____

A) by descent from a common ancestor B) because of convergent evolution C) by chance mutations D) in function but not structure

Biology & Microbiology

Which pathogen would most likely be responsible for a urinary tract infection caused by improper wiping after defecation?

A) Mycoplasma B) Chlamydia C) Escherichia coli D) Salmonella

Biology & Microbiology