A bacterial species that cannot tolerate the presence of oxygen and will only grow in the absence of oxygen is classified as a(n):

obligate aerobe
obligate anaerobe
facultative aerobe
microaerophile
aerotolerant anaerobe


obligate anaerobe

Biology & Microbiology

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In a dihybrid cross involving two autosomal traits on different chromosomes in which the parents are purebred for the opposite forms of both traits, how many of the offspring would be expected to be homozygous recessive for both traits?

A. 9 out of 16 B. 6 out of 16 C. 1 out of 16 D. 3 out of 16

Biology & Microbiology

The ____ is one of a pair of ciliated channels

through which oocytes are conducted.

a. ovary b. uterus c. vagina d. oviduct e. follicle

Biology & Microbiology

How does the availability of milkweed plants affect the migration of monarch butterflies?

a. Without milkweed plants, the female monarch would starve. b. Without milkweed plants, the monarch larvae would starve. c. Without milkweed plants, the male monarch would starve. d. When milkweed plants are abundant, monarch predators would thrive e. When milkweed plants are abundant, the male monarch could not find a mate.

Biology & Microbiology

The risk of cancer can be reduced by ________

A) avoiding unnecessary medical x-rays B) smoking more because nicotine can kill cancerous cells C) increasing saturated fats in the diet D) decreasing fruit intake because fruits can be carcinogenic

Biology & Microbiology