Advertisement Upgrade to remove ads

Scrotum

A sac containing the testes.

what does blood do to the penis?

It causes an erection.

How many eggs does the female ovary contain?

2 million egg cells

How many sperm does a male typically produce daily?

several hundred million

Testosterone

The male sex hormone.

Ovary

The female gonad.

Genital Herpes

A common viral STD

What penetrates an egg?

During fertilization, enzymes at the tip of the head of the sperm help penetrate it.

Where are sperm produced?

In the testes and seminal vesicles.

Where are mitochondria located?

In the midpeice of the sperm.

After puberty, how many and how often are eggs produced?

Only one is produced and about every month.

Embryo

Is what a developing human is called from 8 weeks till birth.

where are sperm cells never found?

Ovaries

what is the structure specialized for fetal development?

Uterus

What is the period of time from zygote formation till birth?

Gestation

What is the Endocrine gland?

a ductless glass that secrete into the blood stream.

Adrenal glands are located where?

Above the Kidneys

what changed the early atmosphere by giving off oxygen?

Cyanobacteria

Radiometric dating.

the determining of the age of a rock.

what was amino acids gathered into , which was the first step to cellular organization?

Microspheres

Organisms safely lived on land after what?

After the ozone formed.

what was the major structure change that made living on land possible

lungs.

Prokaryotes that lack peptidoglycon in their cell walls are called what?

Archebacteria

3 successful kingdoms that evolved from protists.

Fungi, plants, and Animals

First vertebrates on land.

Amphibians

What did reptiles evolve from?

Amphibians

Evolution occurs from what?

Natural selection

Strong evidence of evolution occurs from what?

fossil records

mutation.

is a source of evolution

why are fossils often used as evidence of evolution?

it shows how organisms change with he passage of time.

What may geographic isolation lead to?

Divergence and speciation.

Fallopian Tube

The passageways throught which the ovum travels

Cleavage

A series of divisions which the zygote goes through in the first week of fertilization

Estrogen and Progesterone

The female sex hormones

Implication

six days after fertilization, the blastocyst burrows into the uterine lining.

A sexually transmitted disease can be treated and cured with antibiotics if they are what?

caused by Bacteria

Why was ozone imprtant in enabling organisms to live on land?

It protects us from ultraviolet radiation.

What was the first multi-cellular organisms to colonize the land?

...

What is the Endosymbiotic theory?

the theory that proposes how eukaryotic cells arose from prokaryotic cells. mitochondria and chloroplasts was thought to be prokaryotic cells at one time.
Larger prokaryotic cells engulfed mitochondria and chlroplasts and the formed mutualistic relationship resulting in out first eukaryotic cells.

Epidydimus

Where the sperm matures and become mobile.

vas deferens and the scrotum

where sperm are deposited in the female system by.

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set