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?

   • The fern makes seeds in cones; the pine makes spores
   • 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
2. 2.

   Esme sorts four plants: oak, pine, fern and moss. Which sort is right?

   • Seeds: oak, pine, fern. Spores: moss
   • Seeds: oak, pine. Spores: fern, moss
   • Seeds: oak. Spores: pine, fern, moss
   • Seeds in fruit: oak, pine. Spores: fern, moss
3. 3.

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

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

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

   • Seedling, adult tree, cones, wind carries pollen, seeds on scales
   • Seedling, adult tree, spores from cones, then seeds
   • Seedling, adult tree, cones, seeds on scales, then wind carries pollen
   • 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 seeds that already sprouted
   • Pine pollen, blown by the wind toward seed cones
   • Pine flower petals that fell into the water
   • Bits of pine fruit carrying the seeds
6. 6.

   A spore falls from a fern's sori near Milo's path. Which path leads to a new adult fern?

   • Spore, seed, seedling, young fern
   • Spore, heart-shaped plant, wind blows sperm to egg, young fern
   • Spore, heart-shaped plant, sperm swims to egg, young fern
   • Spore, young fern, adult fern, with no egg or sperm
7. 7.

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

   • Wind carries the sperm, so dryness has no effect
   • Sperm need water to swim, so fewer eggs were fertilized
   • The seeds dried out before sprouting
   • 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
   • Agree: the capsule is full of tiny seeds
   • Agree: spores and seeds are the same thing
   • Disagree: moss makes spores, with no young plant inside
9. 9.

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

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

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

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