Why might a scientist repeat an experiment if she did not make a mistake in the first food

What structure is missing in a animal cells but present in almost all other all types

A man with the autosomal recessive disorder phenylketonuria (PKU) and a woman without PKU have a son named Peter, who does not have PKU. Peter is curious about whether his mother is a carrier for PKU. What facts would allow him to know?

Write a one page Poem (200 words minimum) about a marine ecosystem (Choose between Coral Reef, Hydrothermal Vent, Mangrove Forest or Deep Ocean)

Give me an example of how a biotic factor minght influence the organisms in an ecosystem

Is there a credible scientific theory that opposes evolution?

Marissa is adding numbers in her head. Which part of her brain is she using?

Describe how carbon ends up in animals such as foxes?

What is an example of a shared derived characteristic

Which type of immunity occurs when antibodies pass from mother to fetus via placenta or from mother to baby via breast milk?

What name is given to a gene that causes cancer?