Describe the location of the two major ventral body cavities.
What will be an ideal response?
The thoracic cavity is located between the chest and upper portion of the back. The abdominopelvic cavity is located inside the lower half of the trunk of the body. The diaphragm separates these two cavities.
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Which of the following is not an autosomal recessive disorder?
A. sickle-cell disease B. Marfan syndrome C. cystic fibrosis D. Tay-Sachs disease E. All are autosomal recessive disorders.
Intracytoplasmic sperm injection is used by couples in which
A. the female has blocked oviducts. B. the female has very irregular ovulation. C. the female is approaching menopause. D. the source of sperm is a sperm bank. E. the male is infertile.
Which of the following molecules mediate the association of actin filaments with the cadherins in an adherens junction?
a. Plakoglobulins b. Plectins c. Talins d. alpha- and beta-catenin
A protist such as Chlamydomonas may switch to sexual reproduction when:
A) there is little nutrition. B) hormones from nearby members of the species are detected. C) there are numerous predators. D) a 90-day cycle is completed.