Carcinogens in tobacco smoke may cause telomeres to shorten.
a. true
b. false
a. true
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Which anterior pituitary hormone triggers ovulation?
a. GnRH b. estrogen c. progesterone d. FSH e. LH
When the RNA primers are removed from the 5' ends of eukaryotic chromosomes after replication, DNA polymerase is unable to fill in the gaps. What prevents the chromosomes from getting shorter and shorter with each round of replication?
What will be an ideal response?
What route is being followed by water that moves through nonliving regions of a root, such as air spaces in root tissue?
a. the apoplastic, transmembrane, and epidermal pathways b. the symplastic, transmembrane, and transepidermal pathways c. the transmembrane, epidermal, and transepidermal pathways d. the apoplastic, transmembrane, and symplastic pathways
Digested fats are packaged into ________, which are too big to enter blood capillaries and so have to diffuse into lacteals, where fats enter the lymph and are transported within the lymphatic system
A) micelles B) chyme C) chylomicrons D) bile salts E) lipases