7th - Chapter 9 Science Test Flashcards

1
Q

What is Tropisms?

A

growth responses of a plant to its environment. (light, gravity, touch)

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2
Q

What is Positive Phototropism?

A

the plant demonstrates when a plant’s stem and leaves turn toward the light

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3
Q

What is Positive Gravitropism?

A

a plant root’s growth response to gravity

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4
Q

What are Roots?

A

-plant organs that demonstrate positive gravitropism.

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5
Q

What is Negative Gravitropism?

A

a plant stem’s growth response to gravity.

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6
Q

What is Thigmotropism?

A

The stems of some plants have the ability to grow toward an object they touch.

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7
Q

What are Hormones?

A

small chemicals made by some plant tissues that affect how other plant structures grow.

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8
Q

What are the 4 types of hormones?

A
  1. Auxins
  2. Cytokinins
  3. Ethylene Gas
  4. Abscisic acid
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9
Q

Whare are Auxins?

A

Cause shoots and stems to grow by causing their cells to enlarge. They slow down cell division (encourages the plant to grow)

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10
Q

What are Cytokinins?

A

Opposite of Auxins
Causes cells to divide
Causes cells to enlarge and slows down cell division.
Helps plants that don’t have enough water.
(Encourages the plant to grow

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11
Q

What are Ethylene Gas?

A

Can cause fruits to ripen.
They can prevent a plant from losing too much sap.
Causes trees to close off the xylem and phloem to their leaves before they fall.

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12
Q

What are Abscisic acid?

A

plant hormone that acts as an inhibitor to other hormones. (prevents seeds from
sprouting) -Keep the plant from growing out of control.

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13
Q

What are day-neutral plants?

A

not affected by the length of day

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14
Q

What are Long-day plants?

A

plant flowers when the nights are shorter than its critical night length.

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15
Q

What are short-day plants?

A

most likely bloom when given a long amount of time in the dark or when the nights
are longer than the critical night length. Ex:Poinsettias which need at least 13 hours of darkness to
bloom.

Seedless Plants such as mosses need wet environment to reproduce because the sperm must swim to
the unmoving eggs.

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16
Q

What is Alternation of Generations?

A

The repeating life cycle of gametophyte and sporophyte stages in plants.

17
Q

What are the types of Reproduction in Non-Vascular Plants?

A

Liverworts and Mosses:
* most often see the gametophyte stage.
* A fertilized zygote develops into the stalk and capsule of the sporophyte.
* The capsules produce spores.

18
Q

What are the types of Reproduction in Seedless Vascular Plants?

A

Ferns-
* Most often see the sporophyte stage.
* A fertilized zygote develops into a recognizable fern.
* The sori on the underside of fronds produces spores.

19
Q

What are the types of Reproduction in Gymnosperms?

A

Pine tree- reproduces with seeds.

Gymnosperms-
* Produce cones (which produce pollen)
* Need wind for fertilization-pollen must travel from the male cones to female cones to fertilize the eggs.

20
Q

What is Reproduction in Angiosperms?

A
  • After fertilization, ovule forms a seed and the ovary forms a fruit.
  • Pollen produced in the anther of the stamen.
  • Ovules contained within the ovary.
  • Seed germination-has to have the right temperature, right moisture, and other conditions.
21
Q

Know the male and female part of the flower

A

Activity Manual page 9 B (structure of flower) will help.
(You do not have to label but do have to know)

22
Q

Extra Credit - Psalm 33:6

A

By the word of the Lord were the heavens made; and all the host of them by the breath of His mouth.