This type of tissue has gap junctions, a single

nucleus, many mitochondria, is striated and
functions involuntarily. This tissue type is



a. skeletal muscle.
b. smooth muscle.
c. cardiac muscle.
d. striated columnar epithelium.
e. more than one of these


C

Biology & Microbiology

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The earliest stromatolites were probably formed by

A) anoxygenic phototrophs. B) anoxygenic lithotrophs. C) oxygenic phototrophs. D) oxygenic lithotrophs.

Biology & Microbiology

You are studying a mini-ecosystem that you created from samples of lake water, plants, and sediment. Your teacher tells you to drop about 10 sesame seeds on the top of the water because they will attract some interesting organisms. One week later, you

see that the seeds are surrounded by white fuzz that is extending off of the seeds, and you conclude that the decomposing seeds have been colonized by A) diatoms. B) brown algae. C) unikonts. D) water molds.

Biology & Microbiology

The organ system that protects the underlying tissues from abrasion, prevents dehydration, and aids in regulating body temperature.

A) Muscular    

G) Respiratory 

B) Reproductive  

H) Skeletal 

C) Digestive 

I) Nervous 

D) Cardiovascular 

J) Endocrine 

E) Integumentary 

K) Lymphatic 

F) Urinary 

Biology & Microbiology

Skeletal muscle can operate anaerobically for short periods, producing ________ and a small amount of ATP

a. lactate b. pyruvate c. creatine d. phosphate

Biology & Microbiology