Which type of muscle typically surrounds hollow tubes and organs like the stomach?

A. smooth muscle
B. skeletal muscle
C. cardiac muscle
D. voluntary muscle
E. striated muscle


A. smooth muscle

Biology & Microbiology

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In Drosophila, a narrow, reduced eye is called a bar-eye. It is due to a dominant X-linked allele (B),

while the full wild-type is due to the recessive gene (B+). Give the F1 and F2 genotypic and phenotypic expectations of a cross of a homozygous wild-type female with a bar-eyed male. What will be an ideal response?

Biology & Microbiology

Blood in the veins looks purplish because ____

a. it contains less oxygen than arterial blood b. most of the oxygen is dissolved in the plasma c. less oxygen is in the plasma compared to bound to hemoglobin d. it contains less carbon dioxide e. veins run deeper than arteries

Biology & Microbiology

Nitrogen is a plant macronutrient

Indicate whether the statement is true or false

Biology & Microbiology

Which of the following is most likely to be responsible if, when your blood sugar level rose, the level went back down?

A) the use of the sugar for energy by your cells B) a homeostatic mechanism based on negative feedback C) type 2 diabetes D) a homeostatic mechanism based on positive feedback

Biology & Microbiology