Which of the following is not involved in the regulation of transcription?

A. introns

B. DNA methylation

C. nucleosomes

D. regulatory proteins or transcription factors

What is produced in a lymph node? A. White blood cells B. Antigens C. Lysozymes D. Red blood cells

A food chain has only one link for producers but many links for consumers. 1. True 2. False

D. Birds compete for food 4. In a forest ecosystem, which is an abiotic factor? a. The amount of rainfall b. The size of the deer C. The types of trees d. The number of birds 5. Which of the following hest describes the difforong

Animal waste decay by the action of bacteria witch create

Read the following passage from "The women's baths"? "I have never know my grandmother to be generous and open-handed as on the day which we spent at the market baths".

Who is known as "the father of medicine"?

What lipids make up the cell membrane? how many layers does it hare? what are the functions of the cell membrane?

What cells photosynthesise the most

Describe the role of lymphocytes antibodies and antigens in the body's immune system

How are physical and chemical weathering different?