What characteristic of vertebrates is missing in all invertebrates?
What will be an ideal response?
The vertebral column.
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Why is eating carrots thought to be useful for enhancing vision?
A. High levels of chlorophyll in carrots helps with photosynthesis in the eyes. B. High levels of beta-carotene can lead to the production of a pigment used in vision. C. High levels of carotenoids in carrots can allow vertebrate eyes to perform the dark reactions. D. High levels of NADPH in carrots can allow vertebrate eyes to perform the light reactions.
What type of molecules, embedded in phospholipid bilayers, transport hydrophilic molecules into or out of the cell?
A) carbohydrates B) proteins C) nucleic acids D) lipids
conduction
What will be an ideal response?
Anatomical factors that cause women to be at higher risk of urinary tract infections than men include
A) more acidic urine in women. B) a shorter urethra positioned closer to the anus in women. C) antimicrobial peptides found in the seminal fluid in men. D) the flushing of the urethra during ejaculation in men. E) separate openings for the urinary and reproductive tracts in women.