What can happen after a lake receives a large input of limiting nutrient

Which two conclusions can be made about the animals from their embryo structure?

A biologist wishes to take a useful gene found in penguins and introduce it into some bacterial cells. Her experimental procedure is given below. Use a restriction enzyme to cut a gene out of the penguin DNA.

What is the primary function of enzymes in an organisms

What happens when a cell in the liver continues to divides as fast as they grow and synthesize DNA? Would it become a problem or no?

In starfish, pink boy color (P) is dominant to orange (p), and thick eyebrows (T) are dominant over thin (t) ones. Patrick, who is heterozygous for body color but purebred for thick eyebrows, has met Patti, who is recessive for both traits.

An elephant has 56 chromosomes. Which statement about a zygote of an elephant is true?

Why when you rub a balloon on a piece of fabric or carpeting and then hold it against your head, your hair can stand up?

Which of the following statements is not true? Essential nutrients can be synthesized by the body. Vitamins are required in small quantities for bodily function.

Trees have active transport, why?

The question is how many chromosomes are in the sperm cells, and how many chromosomes will it's zygote have.