Which one of the following are muscles that can contract, making the lens rounder to focus on close objects, and can relax to flatten the lens, enabling focus on distant objects?
A. iris
B. lens muscles
C. ciliary muscles
D. lateral rectus muscle
C
Biology & Microbiology
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Evidence of ________ supports the hypothesis that eukaryotes are derived from bacteria
A) antibiotic resistance B) DNA content in the nucleus C) ribosome contents D) ribosome contents and DNA content in the nucleus
Biology & Microbiology
The slow block to polyspermy occurs when polar bodies discharge their contents, thereby altering the
egg coats.
Indicate whether the statement is true or false.
Biology & Microbiology
During male ejaculation ____
a. smooth muscle of the vas deferens contracts b. prostate contractions are inhibited c. sperm are forced into the epididymis d. the seminal vesicles secrete fluids into the testes e. the bladder sphincter is relaxed
Biology & Microbiology
The nervous system develops from endoderm
____________________ Indicate whether the statement is true or false.
Biology & Microbiology