When the quadriceps contact what also must happen at the same time?

A. The gastrocnemius must contract.

B. The hamstrings must relax.

C. The hamstrings must contact.

D. The gastrocnemius must relax.

A student reads the article "Autoimmune Diseases Stopped in Mice" and claims that this research will revolutionize treatment for autoimmune disorders in just a few years.

Which statement best describes some protein molecules in a cell? a) proteins are long, folded chains that can form various cell parts b) proteins are composed of four different starches that direct cell activity c) proteins are long, twisted strands

What are the Three different sciences that Student study at GCSE level

Which source should be avoided when conducting scientific research

What is the existence of sociology as an academic area of study based on?

Choose all the answers that apply. According to the rock cycle, sedimentary rock can change into what? 1. other sedimentary rock 2. igneous rock 3. metamorphic rock

The organism shown is a free-living one that is anchored to the bottom of ponds and streams during the first part of its life cycle. What is the common name of this organism? jellyfish hydra coral anemone

Which two space shuttle's were lost to explosions?

A scorpion stalks, kills, and then eats a spider. Which ecological terms describe the scorpion? consumer, carnivore, heterotroph producer, herbivore, decomposer detrivore, consumer, heterotroph omnivore, producer, autotroph

The first day of football practice was rough on the squad. During practice, the players complained of cramps and sore muscles.