Life cycles of flowering plants, conifers, mosses and ferns

Grade 7 Science Worksheet - Challenge Me

Circle the best answer.

1. 1.

   Ari compares a fern's cycle with a pine's cycle. Which difference is right?

   • Both make seeds, but the fern's are tiny
   • The fern makes spores; the pine makes seeds on cones
   • The pine makes fruit; the fern makes flowers
   • The fern makes seeds in cones; the pine makes spores
2. 2.

   Bo looks at a seed and a spore under a hand lens. What does the seed have that the spore lacks?

   • Nothing more: a spore is a tiny seed
   • Sperm that must swim to the egg
   • A fruit wrapped around it, as on a pine
   • A young plant, stored food and a coat
3. 3.

   Jun's cherry tree flowers during a cold, rainy week, and few bees visit. What will Jun likely see in summer?

   • More cherries, grown from the fallen petals
   • Spores in place of the cherries
   • Fewer cherries, since fewer flowers were pollinated
   • As many cherries, since fruit forms before pollination
4. 4.

   Kira plants a pine seed. Which order of steps leads to the new tree's own seeds?

   • Seedling, adult tree, cones, seeds on scales, then wind carries pollen
   • Seedling, adult tree, spores from cones, then seeds
   • Seedling, adult tree, cones, wind carries pollen, seeds on scales
   • Seedling, adult tree, flowers, bees, seeds in a fruit
5. 5.

   Paddling a boat in spring, Luz sees yellow dust floating on a lake beside pine trees. What is it most likely, and what is it for?

   • Pine pollen, blown by the wind toward seed cones
   • Pine flower petals that fell into the water
   • Bits of pine fruit carrying the seeds
   • Pine seeds that already sprouted
6. 6.

   A spore from a moss capsule lands on Noah's damp log. Which path leads to a new capsule?

   • Seed, seedling, leafy moss, capsule
   • Threads, then a capsule, with no egg or sperm
   • Threads, leafy moss, wind blows sperm to egg, capsule
   • Threads, leafy moss, sperm swims to egg, stalk and capsule
7. 7.

   In a dry year, Pia's fern patch makes plenty of spores but few new ferns. Which explanation fits best?

   • Sperm need water to swim, so fewer eggs were fertilized
   • The seeds dried out before sprouting
   • Wind carries the sperm, so dryness has no effect
   • Spores grow straight into ferns, so dryness doesn't matter
8. 8.

   Ren says moss makes tiny seeds that are too small to see. Agree or disagree?

   • Disagree: moss makes its seeds in cones
   • Disagree: moss makes spores, with no young plant inside
   • Agree: spores and seeds are the same thing
   • Agree: the capsule is full of tiny seeds
9. 9.

   Tala says a pine cone is the pine tree's fruit. Agree or disagree?

   • Disagree: a pine cone holds spores, not seeds
   • Agree: the cone grows from a pine flower
   • Agree: seed plants each wrap their seeds in fruit
   • Disagree: pine seeds sit bare on cone scales
10. 10.

    Zee says ferns and pines both grow from seeds. Agree or disagree?

    • Agree: fern seeds are the dots under the fronds
    • Agree: both make seeds in cones
    • Disagree: pines grow from seeds inside fruit
    • Disagree: ferns grow from spores; pines from seeds