fibrous joint in which two adjacent bones are linked by a strong membrane or ligaments. This definition also applies for the distal tibiofibular syndesmosis, which is a syndesmotic joint formed by two bones and four ligaments.

6 0

2 years ago

List the following units of time from shortest to longest: age,eon,epoch,era,period, and year

lozanna [386]

Answer:

year, age, epoch, period, era, eon

Explanation:

5 0

3 years ago

You are a graduate student in the lab of a famous fly geneticist. You need to analyze a batch of mutant flies that were recently

bazaltina [42]

Answer:

knirps (a gap gene)

wingless (a segment-polarity gene)

kruppel (a gap gene)

even-skipped ( a pair-rule gene)

hunchback (a gap gene)

hedgehog (a segment-polarity gene)

Explanation:

The gap, segment-polarity and pair-rule genes play central roles in controlling embryonic development of arthropods. In the first place, the gap genes are associated with the formation of contiguous body segments, thereby mutations in these genes result in gaps in the normal body plan of the embryo. For example, in Drosophila melanogaster, mutations in the knirps, Krüppel and hunchback genes result in deletion of body segments. These genes are also known to regulate segment polarity genes, which determine the polarity of the embryonic parasegments by modulating Wnt and Hedgehog signaling pathways. Finally, the pair-rule genes work together with gap genes to control embryonic development of alternating body segments.

3 0

3 years ago