N the following diagram of the energy flow in an ecosystem, what does symbol 1 represent?

A.

heat

B.

sunlight

C.

consumers

D.

glucose

A complete circuit contains two parallel-connected devices and a generator for providing the electromotive force.

What must occur during fertilization in humans in order to produce a male child? The zygote must receive a Y chromosome. The zygote must receive two X chromosomes. The zygote must receive an X chromosome. The zygote must receive two Y chromosomes.

In the alternation of generations life cycle spores grow into gametophyte plants via a process called A. mitosis. B. meiosis. C. photosynthesis. D. gamete formation.

Which rock cannot be found as a chemical sedimentary rock? A. chert B. limestone C. sandstone D. rock gypsum

Scientists consider structure, biochemistry, location, reproductive habits, and many other characteristics of an organism in order to classify it as a particular species. the reason is that

Rna polymerases join nucleotides through what kind of bond?

Which is NOT a function of the human stomach? A) stores food for short period of time B) breaks up food physically and chemically C) receives food from your mouth directly after swallowing D) HCl produced inside the stomach to aid in digestion

What is a recessive gene? a. The gene that displays itself. b. The hidden gene. c. The gene that is dominant.

Much of the fluid that moves across capillary walls and into the tissues moves as a result of filtration, forced by blood pressure. o2 on the other hand travels from the capillaries into the tissues as a result of what?

Which organisms are extremely small and use hosts as both home and food supply