In prokaryotic genes, some repressor proteins block transcription. a repressor can block transcription by binding to which of the following?

1) which of the following is the earliest era of earth's geological time scale a) cenosoic b) mesozoic c) precambian d) paleozoic 2) the idea known as panspermia proposed that life originated in space and came to life inside a a) spaceship b)

What do birds like to eat?

What is a type of food that humans eat and would make them a tertiary consumer?

How many sarcomeres do you think are in a muscle cell found in your quadriceps?

The carbohydrates, proteins and minerals that are vital to an organisms survival are found in: 1. food 2. carbon dioxide 3. oxygen 4. water

3. In which process do substances have to be in direct contact when heat moves from areas of more heat to areas of less heat?

While on an archaeology expedition, you unearth a skeleton with the following characteristics: four long, slender finger bones and a smaller opposable thumb bone, long arm bones, fingernails, and eye sockets close together on a skull.

Describe respiration

Which of the following is a property of minerals? a. Age b. Odor c. Hardness d. Size

What created the abundant agriculture in the Napa Valley of California? A:oceanic-continental convergence B: an earthquake C: a tsunami D:continental-continental convergence