Producers are the source of all food in an ecosystem true or false

Explain why human eggs all contain one X chromosome

Would anyone be willing to check an environmental science quiz for me? Ive already answered them, I just need to make sure theyre correct.

03:16:34 Which kingdom contains organisms that are multicellular, heterotrophic, eukaryotic, and lack cell walls? Animalia Protista Plantae Fungi

A television advertisement claims that a certain brand of cough drop reduces coughing for 8 hours. Describe an investigation that could be used to determine if this claim is valid.

The body is supported by what

Which of these is true for bacteria because they are prokaryotic cells a - they can destroy neutrophils b - they are much smaller than lymphocytes c - they can invade macrophages d - they are much larger than killer T cells

What are some non-examples of carbohydrates

A person with type O blood can give genes a. AB. b. AO. c. BO. d. OO.

List the reasons why food chains to not send to exceed 4 links

How do organisms with small genomes, such as escherichia coli, carry out so many different biochemical reactions?