In eukaryotic cells, chloroplasts are the site of photosynthesis, and mitochondria are the site of aerobic cellular respiration. how are bacteria able to carry out photosynthesis and aerobic cellular respiration without these organelles?

Hmg-coa reductase is a highly regulated enzyme. identify three distinct mechanisms by which this enzyme is regulated. for each, describe the triggering event and its outcomes on hmgr levels or activity.

Which of the following is an example of an ecosystem? A) zebras and lions that pray on them B) coral reef with all the fishes and invertebrates living in and around it C) flowering plants and all the birds and insects that pollinate them D) male

What does an experiment show us that no other type of research shows

A major group of organisms, that are, in general, multicellular, capable of locomotion and responsive to their environment, and feed by consuming other organisms

What is the main function of the Krebs Cycle? A To supply energy for cell functions B To make carbon dioxide molecules C To fuel the glycolysis process D To produce energy-carrier molecules

What are the four basic needs of plants

Which of the following statements correctly relates mutations and survival rates of animals? Mutations always improve the chances of survival for an animal. Mutations sometimes improve the chances of survival for an animal.

Which derived character is shared by fish and frogs but not lancelets? A. hair B. four-legged locomotion C. amniotic eggs D. vertebral column

In what regions of the world is habitat loss most rapid?

Describe the process of speciation in relation to change in gene frequency, change in environment, natural selection, and genetic drift.