Which trophic level contains the organisms that are source of all chemical energy used in an ecosystem

A scientist is studying the lysogenic cycle of the lambda 1 phage of Escherichia coli. This means that she is investigating A. the integration and stabilizing of the lambda 1 phase into a host cell's genome. B.

Which of the following is a function of the rough endoplasmic reticulum? storing calcium ions synthesizing receptor proteins detoxifying drugs synthesizing steroid hormones

Which one of its following abilities could have led to this?

carol and joseph have frecklesand curly red hair. All of their children, except one, also have freckles and curly red hair.

A scientist measured the composition of a lean adult male human body. He found that the composition was as follows: 60% water, 17% protein, 17% fat, and 6% other.

Why is heat death the most likely option?

16. Which part of a mushroom can you see above the ground? A. Hyphae Mat B. Feeding Network C. Mycelium D. Reproductive Structure

The core of nearly all cell membranes is a double layered sheet called a (an)

Which enzyme assembles the complementary nucleotide bases during replication? RNA polymerase RNA ligase DNA polymerase DNA ligase

HURRY! The cell membrane is selectively permeable because of its molecular structure. Based on this, which one of these would NOT diffuse directly through the cell membrane?