Sister taxa Sister taxa represent a polytomy. represent the common ancestor of taxa. diverge from all other lineages early in the history of the group. represent groups of organisms that share an immediate common ancestor.

A lizard is blown out to sea during a hurricane. This type of storm occurs very infrequently-on average once every 100 years. The lizard washes up on the beach of a small island. The lizard finds some beetles on the beach.

Which of the following describes tight junctions? a. junctions among epithelial cells lining the digestive tract b. junctions within electrically excitable tissues, such as the heart and smooth muscle cell c.

Which of the following phenotypes is an example of polygenic inheritance? skin pigmentation in humans white and purple flower color in peas the ABO blood system in humans pink offspring resulting from the breeding of white and red flowers

5. Chlorophyll is present in a) Air sacs of the laeves b) Chloroplast of leaves c) Stomata d) Upper epidermis

Factors that can alter the level of expression of a gene include Check All That Apply an increase in l temperature. an increase in salinity. exposure to UV radiation. presence of particular energy substrate.

Which of the following is an example of a cultural control of pests? using natural pest predators using pest hormones using synthetic pesticides keeping homes clean

Why do microbiologists often disinfect work areas before working with bacterial cultures?

According to the animation, to what genetic element does the rna polymerase bind? according to the animation, to what genetic element does the rna polymerase bind? the operator the repressor mrna the repressor protei

Is Pinocytosis a form of passive transport?

If part of the xylem of a young oak tree is destroyed, which of the following functions would it interfere with most? A) conduction of water to the leaves B) conduction of carbohydrates to the roots C) absorption of carbon dioxide from air