Human Biology
Biology
Planets
Physics
More Biology
100

A human male in two weeks makes enough
sperm cells swimming in some liquid stuff
so embryonic life could be unfurled
in every fertile woman in the ______.

world

100

We have two eyes and two of other parts,
but octopuses have three throbbing _______.

hearts

100

A cloud that's Cumulus might make land shady.
Its average weight, in elephants, is _________.

eighty

100

Count atoms in your body's cells all day:
each one has more than stars in the Milky _____.

Way

100

What's a scent that isn't sensed? A rose
requires for its fragrance someone's ____.

nose

200

Our lives with all Earth's former lives are linked
though ninety nine percent of species are _______.

extinct

200

Because it hasn't any bones at all,
it squeezes, if it chooses, through a wall,
oozing through a hole that is as small
as its aquatic octopus eye ______.

ball

200

On Neptune, summer lasts for forty years,
but that's not quite as nice as it appears:
three hundred degrees below zero would freeze our ______.

ears, rears

200

Sixteen sextillion stars, the cosmic crop,
the number of molecules in a water _____.

drop

200

Two thousand meals a day may sound absurd,
but it's just right, if you're a humming ______.

bird

300

Our cells can read what spiraled proteins say,
instructions, like a text, in _______.

DNA

300

Most bees buzz in the key of A. A bee,
when tired, buzzes in the key of ____.

E

300

The hole in our galaxy's center might astound.
The sun has circled twenty times __________.

around

300

It's got far less states than America has;
for matter, it's plasma, solid, liquid, ____.

gas

300

Your capillaries, arteries, and veins,
stretch sixty thousand miles, like highway _____.

lanes

400

Each smaller than a miniscule pinhead,
our cells have genome texts that can be_____ .

read

400

A soil teaspoon though of tiny girth
has more life forms than people on the _____.

Earth

400

Earth's grains of sand are far outnumbered by
the stars, though few are seen now in the ____.

sky

400

You clean your room and make it orderly,
but soon it's messy, thanks to ________.

entropy

400

They pull a hundred thousand times their weight,
Earth's strongest creatures, spreading from a mate,
but they're no fun, no wholesome panacea,
they're microbes with the name of ________.

gonorrhea

500

A hundred trillion cells contain the books,
a million, that determine things like _____.

looks

500

Ten thousand trillion ants that populate
this planet, roughly equal human ________.

weight

500

Sir William Herschel discovered Uranus, no dunce.
It circled the sun in his life exactly __________.

once (a year on Uranus lasts 84 Earth years)

500

It acts like it's a particle. How cool,
light also acts like waves, its nature ______.

dual

500

The brain, containing bright idea thoughts,
is like a light bulb, using twenty ________.

watts