Which vitamin is essential in early pregnancy to prevent nervous system defects such as spina bifida, which is characterized in the fetus by incomplete closing of the backbone and membranes around the spinal cord mastering biology?

Crawfish are shelled organisms that live in shallow freshwater rivers. They can have antennae of different lengths. Two parents with medium length antennae have offspring. One of their offspring has short antennae, and one has long antennae.

Rovers places six eggs in a pot of boiling water (100° c. and six eggs in a pot with water at (80° c. he keeps the eggs in the water for ten minutes.

15. Glaucoma is a disease of the A. muscles of the body. B. ear. C. eye. D. nervous system.

Which of the following is a period within the Cenozoic Era? Quaternary Tertiary both a and b none of the above

Why would cells die if they were unable to make (or otherwise obtain) the amino acid arginine?

Which product is formed during the metabolic reactions of cellular respiration?

What does it mean when plants and fungi are inmobile?

What is another name for inherited advantageous characteristics

Nearly all organisms on earth carry out some form of glycolysis. How does that fact support or not support the assertion that glycolysis is one of the oldest metabolic pathways?

What are other names for bio molecules?