About four or five days after fertilization, a group of cells forms a ball-like structure. What is the name of this structure? A. Heart B. Placenta C. Blastocyst D. Stem Cell

What happens when the lungs recoil? a. Ribs and diaphragm muscles contract. b. Expiration occurs. c. Inspiration occurs. d. Internal respiration occurs.

What are some interesting facts about the rough er?

How does a penguin increase the chance of survival of its species

The incidence of down's syndrome increases with the age of the mother. a. True b. False

What determines the amount of energy a human can recieve from food

What are the general characteristics of sexual reproduction in humans and other vertebrates that are associated with continues production of many sperm cells but intermittent, finite production of egg cells?

Two students are using the distance formula to determine the distance between (9, 4) and (-3, 8) on a coordinate grid. Their work is shown below. The differences are each squared. The differences are added together.

Why does the color black Absorb and white reflect?

Yellow bananas are called triploid organisms. Why do you think this is?

A method for eating out healthfully is to a method for eating out healthfully is to order any meat dish grilled or broiled and avoid fried or breaded meat dishes. eat out only when you are not especially hungry.