How do identical twin forms

a. two eggs are fertilized by one sperm

b. a fertilized egg splits in two

c. two eggs are fertilized by two sperm

d. two sperm fertilized an egg

Lily visits her family doctor. He tells her that the upset stomach she experienced after drinking milk is caused by too little lactase, an enzyme that breaks down a sugar in milk into monosaccharides. Which monosaccharides form from this reaction?

What is the main difference muscle cells and nerve cells?

In producing an E. coli plasmid to be an expression vector, an experimenter includes genes for selectable markers, a promoter for the expression of the introduced genes. She uses a cDNA sequence to ensure the insert contains no introns.

Antonyms for active transport?

Why do some fronts produce more storms than others

The theory of evolution is most accurately described as Question 23 options: a. an educated guess about how species originate. b. one possible explanation, among several scientific alternatives, about how species have come into existence. c.

What are the symbols for the elements that make up lipids

What is a main function of lipids

Is a sponge permeable

True or false meiosis I is sexual reprodiction in eukartotes