In the accompanying figure, a cell type that distributes breakdown products of digestion to other cells in the sponge

body is identified by the number ____.
a. 1
b. 2
c. 3
d. 4
e. 5


ANSWER: b

Biology & Microbiology

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Which statement is TRUE about Streptococcus pneumoniae and the lung infection it causes?

A) Streptococcus pneumoniae can spread from the focus of infection as a bacteremia. B) Penicillin and erythromycin are the "last chance" drugs for treatment of streptococcal pneumonia. C) Infection with any strain of encapsulated virulent Streptococcus pneumoniae provides long-lasting immunity to all encapsulated virulent strains. D) Streptococcal pneumonia is not as serious as most people think; if left untreated, it usually runs its course in about a week to ten days.

Biology & Microbiology

Synonymous codons protect against mutation because

A) the encoded amino acid changes to a smaller one. B) the encoded amino acid changes to a larger one. C) the encoded amino acid does not change. D) they are exposed to oxidants.

Biology & Microbiology

The two domains of prokaryotes are Bacteria and Fungi

__________________ Indicate whether the statement is true or false.

Biology & Microbiology

In the fruit fly Drosophila, there is a dominant gene for normal wings and its recessive allele for vestigial wings. At another gene locus on the same chromosome, there is a dominant gene for red eyes and its recessive allele for purple eyes. A male that was heterozygous at both gene loci was mated with a female that was homozygous for both recessive alleles and the following results were observed among the offspring:Normal wings and red eyes - 420Vestigial wings and red eyes - 80Normal wings and purple eyes - 70Vestigial wings and purple eyes - 430According to these data, what is the distance, in centimorgans, between these 2 gene loci? (Enter the number only without the units. For example, 100 cM would be entered as 100) 

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology