In plants that have alternation of generations the haploid spores are made by the

A. cotyledon.

B. seed coat.

C. sporophyte.

D. gametophyte.

in the mamalian male reproductive system the part that serves as a passage for both urine and semen is known as what?

When a goose spots an egg outside of its nest, the goose gets out of the nest and rolls the egg back. Once started, a goose continues the egg-retrieval movement all the way back to the nest, even if the egg is taken away during the process.

Which statement is true about relative dating? A.) It is based on the half-life of carbon-14 atoms. B.) It is based on the position of rock layers. C.) It is the most modern of the dating techniques. D.) It is based on radioactivity analysis.

Which of the following describes why most scientists today have adopted the three domain system for classifying organisms

What is the effect of a drought

All the systems of the body work together to keep the internal environment of the body constant within certain limits. this process is called a. homeopathy. b. homoeostasis. c. positive feedback. d. neuroglia.

An experiment for a new asthma medication was set up into two groups. Group one was given the new drug for asthma, while group 2 was given a sugar pill. The sugar pill serves as a:

Linear equations 4x+17=-15 solve in one variable.

Because genes close together on a chromosome tend to be inherited together, they are said to form a

What are the chances of having a child with hitchhiker's thumb if both parents are hybrids? Show work