When during fetal development do rhythmic breathing movements begin?

A species of kangaroo has a diploid chromosome number of 16. After meiosis, to develop the kangaroo's sperm or egg, the haploid number would be. When fertilization occurs, the zygote would again have 16 chromosomes.

What percent of DNA is active and important? Select one: a. 1% b. 50% c. 99% d. 100%

Which two parts make up the lithosphere? A. Crust and the outer part of the mantle? B. Inner core and mantle? C. Mantle and outer core? D. Inner core and outer core?

If an atom of sulfur is neutral, how many electrons should it have?

Why do body cells always use cellular respiration to break down glucose

Euglena use which structure for movement? A. cilia B. flagella C. pseudopods D. they do not move

1. What is a reproductive process in which a cell's genetic information is duplicated and then divided to produce a single identical daughter cell from an outgrowth of a larger parent cell? A. production of spores B. budding C. binary fission D.

True or false? biologists studied the effects of forest fragmentation by calculating the difference between the amount of plant biomass in the edges of forest fragments and the interiors of unfragmented forest.

This is an organ in the digestive system which transports waste out of the body and absorbs water from the waste before it leaves the body.

Which two actioms happens when bonds in ATP moecules are broken