The material which provides rigidity to cell walls is called

A) phospholipids

B) lipids

C) cellulose

Which statement regarding respiration is correct? A) respiration in autotrophic organisms occurs only during the day B) all living organisms carry out some form of respiration C) all autotroph and heterotrophs require glucose and oxygen for

What is formed by carbon by extreme pressure and heat?

Enzymes affect the reactions in living cells by changing

Which of the following is not true if deciduous forests

What are the four groups of organic compounds found in living things?

True or false: the northern lights are caused by earth magnetic field

What is the name of the family that humans are classified in?

Which process produces a greater number of offspring? chromosome duplication asexual reproduction gamete formation sexual reproduction

Aquatic plants do not contain a) chloroplasts b) cells c) lignin d) nuclei e) chlorophyll

Jennifer's baby brother had infantile Tay-Sachs disease (TSD), but Jennifer did not have the disease. When Jennifer grew up and got married, her third child also had infantile TSD. How is this possible? A.