TEKS 10B Biology

10C Which answer choice best describes a community

• Praying mantises caring for their young

• Three-spined sticklebacks living in estuaries

• Different species of lizards occupying the same niche in a desert

• Roosting mother bats recognizing their offspring

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10B Gibberellins are hormones produced in the root tips of plants. The plant uses these hormones to stimulate the growth of shoots.How are gibberellins able to affect other parts of the plant?

• Gibberellins are absorbed through the stomata and attach to chloroplasts.

• Gibberellins are transported through vascular tissues to other parts of the plant

• Gibberellins become concentrated within the tissues of the plant during mitosis.

• Gibberellins become modified once they infect healthy cells and are later released to infect other cells.

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10B Gibberellins are hormones produced in the root tips of plants. The plant uses these hormones to stimulate the growth of shoots.How are gibberellins able to affect other parts of the plant?

• Gibberellins are absorbed through the stomata and attach to chloroplasts.

• Gibberellins are transported through vascular tissues to other parts of the plant

• Gibberellins become concentrated within the tissues of the plant during mitosis.

• Gibberellins become modified once they infect healthy cells and are later released to infect other cells.

10B A chart of some plant systems and functions is shown

Which system interactions are dependent on the plant’s ability to respond to the direction of light?

• Option 1

• Option 2

• Option 3

• Option 4

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10B: Plant roots have extensions called root hairs. These root hairs are important in the homeostasis of the plant. Which statement best explains the importance of the root hairs to the stems and leaves of the plant?

• Root hairs convert minerals into glucose for immediate use by cells

• Root hairs decrease the need for osmosis and diffusion in vascular tissue

• Root hairs prevent water loss in leaves through transpiration and gas exchange

• Root hairs increase the surface area of the roots for nutrient and water absorption

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10B: A corn plant produces both male and females flowers. The male flower forms the tassel and the female flower forms the ear of corn. The silks that emerge from the ear are the stigma of the female flower. Each silk leads to an ovule that can become a corn seed. Which of these must happen for the corn seeds to develop on the ear?

• More tassels than silks need to be be present on the same plant

• Pollen grains must fall from tassels and land on the silks of the ear

• Pollen must be transported from the tassel to the silk through the phloem

• The tassels must come into direct contact with the silks of the ear.

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10C The human body is composed of organ systems. Which list represents a system organized from least to most complex?

• Heart, cardiac muscle, muscle tissue, muscle cell

• Lung tissue, trachea, nostrils, circulatory system

• Muscle cell, muscle tissue, biceps muscle, muscular system

• Integumentary system, skin cell, hair, sweat glands

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10B: Fruits grown in hot climates are usually less sweet than those grown in cooler temperatures. The high temperatures increase the rate of respiration in the plants, thus reducing the sugar content in some fruits. Why does increased respiration in the leaves and stems reduce sugar content in the fruits of a plant?

• Chloroplasts move from the fruits to the leaves and stems to provide energy for respiration

• The flow of nutrients shifts from the phloem to the xylem, moving nutrients away from the fruits

• Sugars are moving from the fruits to the roots for storage

• Sugars produced in the leaves are used as an energy source instead of being stored in the fruits

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10C The diagrams show some of the levels of biological organization. In what order are the levels in the diagrams?

• Population, community, ecosystem

• Organism, community, population

• Organism, population, community

• Ecosystem, population, community

10B The mimosa plant displays thigmotropism by collapsing its leaves in response to touch, as shown in the pictures. The plant on the left is undisturbed. The upper stem of the plant on the right has been touched.

What is the most likely benefit of this mechanism for the plant?

• Protection from a loss of minerals to the environment

• Protection from poor light availability

• Protection from herbivores by becoming less attractive

• Protection from overwatering

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