BIO115 - Quiz 1

Which term is not present in bryophytes? a. rhizoid cells b. a sporangium c. xylem cells d. chloroplasts

c. xylem cells

Atoms that gain or lose electrons are called ions. 1. What is the charge on an oxygen ion that has 9 electrons and 8 protons? 2. If a sulfur ion with 16 protons and 17 electrons loses one electron, what is the resulting charge?

1. -1 2. Neutral

Complete the table by entering the correct numbers of protons and neutrons for each of the isotopes. For your convenience, the periodic table entries for the elements are given. Enter your answers as numerals; for example, 3. 1. number of protons in hydrogen!2: 2. number of protons in carbon!12: 3. number of protons in carbon!14: 4. number of protons in nitrogen!15: 5. number of protons in oxygen!16: 6.number of neutrons in hydrogen!2: 7. number of neutrons in carbon!12: 8. number of neutrons in carbon!14: 9. number of neutrons in nitrogen!15: 10. number of neutrons in oxygen!16:

1. 1 2. 6 3. 6 4. 7 5. 8 6. 1 7. 6 8. 8 9. 8 10. 8

How many protons, neutrons, and electrons does a neutrally charged Carbon atom have? Use the periodic table entry for Carbon to answer the question. Enter each answer as an integer, for example, 3. 1. number of protons: 2. number of neutrons: 3: number of electrons

1. 6 2. 6 3. 6

1. Element 2. Compound Bank: Co O3 CuClO2 CO FeN

1. Co 1. O3 2. CuClO2 2. CO 2. FeN

Identify whether the angiosperm structures are male reproductive structures, female reproductive structures, or non‑reproductive structures. 1. Female reproductive structure 2. Male reproductive structure 3. Non‑reproductive structure Bank: carpel stamen sepal petal

1. Female reproductive structure: carpel 2. Male reproductive structure: stamen 3. Non‑reproductive structure sepal petal

Place the stages in the process of angiosperm pollination in the correct order, beginning with the formation of pollen grains and ending with fertilization.

1. Pollen is carried away by wind or by animals. 2. Pollen adheres to the sticky end of a stigma. 3. The pollen grain grows a pollen tube. 4. The pollen tube extends down through the style. 5. The pollen tube reaches the ovary, and two sperm nuclei travel down the pollen tube.

Description: 1. positively charged 2. negatively charged 3. no charge 4. outside the nucleus 5. components of the nucleus 6. have significant mass Particles: Protons Neutrons Electrons

1. Protons 2. Electrons 3. Neutrons 4. Electrons 5. Protons and Neutrons 6. Protons and Neutrons

1. How many electrons must be present before an atom has a second shell? a. 2 b.3 c.8 d.11 2. Select the statement that best describes the movement of electrons under normal conditions. a. Electrons do not move within their shells. b. Electrons can move in any direction within their shells. c.Electrons move in an orderly fashion between shells. d. Electrons move along set paths within their shells.

1. b. 3 2. b. Electrons can move in any direction within their shells

Arrange the groups of organisms in the order in which they evolved, beginning with the common ancestor of all plants.

1. green algae 2. nonvascular plants 3. seedless vascular 4. plants 5. gymnosperms 6. angiosperms

1. Gametophyte 2. Sporophyte bank: has one set of chromosomes originates from a spore produces sperm and eggs has two sets of chromosomes originates from a zygote produces spores

1. has one set of chromosomes 1. originates from a spore 1. produces sperm and eggs 2.. has two sets of chromosomes 2. originates from a zygote 2. produces spores

complete the following sentences with the correct term.1. Some fungi consist of microscopic, filamentous cells called ________. 2. A mass or tangle of hyphae forms the __________. 3. Mycelium may form large mycelial mats or fruiting bodies term-40such as _________ which are visible to the naked eye.

1. hyphae 2. mycelium 3. mushrooms

Classify each characteristic as pertaining to atoms, elements, or both. 1. Atoms: 2. Both: 3. Elements:

1. the smallest amount of matter

Acidic Neutral Basic a. gastric fluid b. baking soda c. drain cleaner d. pure water e. coffee

Acidic: a. gastric fluid e. coffee Neutral: d. pure water Basic: b. baking soda c. drain cleaner

Classify the characteristics based on whether or not they describe how fungi obtain nutrition. Characteristics describing fungal nutrition Characteristics not describing fungal nutrition

Characteristics describing fungal nutrition - heterotrophic - do not have digestive tracts - cannot move around their environment to find food Characteristics not describing fungal nutrition - autotrophic - have digestive tracts - can move around their environment to find food

Classify the characteristics as describing ferns, mosses, or both plant types. bank: a. Lack vascular tissues b. Gametophyte is the dominant life cycle stage c. have vascular tissues d. Sporophyte is the dominant life cycle stage e. do not produce seeds f. require water for reproduction

Moses: a. Lack vascular tissues b. Gametophyte is the dominant life cycle stage Ferns: c. have vascular tissues d. Sporophyte is the dominant life cycle stage Both: e. do not produce seeds f. require water for reproduction

Positive ion Negative ion Neutral ion a. one proton, zero neutrons, and zero electrons b. three protons, four neutrons, and two electrons c. one proton, one neutron, and two electrons d. one proton, zero neutrons, and one electron e. two protons, two neutrons, and two electrons f. three protons, four neutrons, and three electrons

Positive ion: a. one proton, zero neutrons, and zero electrons b. three protons, four neutrons, and two electrons Negative ion c. one proton, one neutron, and two electrons Neutral ions: d. one proton, zero neutrons, and one electron e. two protons, two neutrons, and two electrons f. three protons, four neutrons, and three electrons

What is the typical pH of biological fluids in humans, such as blood and extracellular fluid? a. 7.4 b. 19.2 c. 3.6 d. 9.7

a. 7.4

Why does water have a pH of seven? a. Water dissociates to form an equal amount of the ions H+ and OH- b. Water does not dissociate because it is not a base. c. Water dissociates to form more OH- than H+ d. Water dissociates to form more H+ than OH-

a. Water dissociates to form an equal amount of the ions H+ and OH-

What property of water makes it resistant to changes in temperature? a. Water has a high heat capacity, so it can absorb a lot of energy before it heats up. b. Water is a liquid, which makes it extremely resistant to changes in temperature. c. Water molecules contain covalent bonds, which prevent it from rapidly changing temperature. d. Water is polar, so it can absorb heat more readily than nonpolar molecules.

a. Water has a high heat capacity, so it can absorb a lot of energy before it heats up.

Water accounts for 60% to 90% of the mass of every cell, and it dissolves many substances that are used or produced in cellular chemical reactions. Although it does not dissolve all substances, water is sometimes called the universal solvent. Which property of water contributes to its ability to dissolve most molecules in the cell? a. Water has polar bonds and is a polar molecule. b. Pure water has a neutral pH, close to physiological pH. c. The specific gravity of water in the body is near 1. d. The atoms in water are held together by ionic bonds.

a. Water has polar bonds and is a polar molecule.

A buffer is a substance that a. accepts hydrogen ions when acid is added to a solution b. absorbs hydrogen ions if a solution becomes too basic c. absorbs hydroxide ions if a solution becomes too acidic d. converts excess hydrogen ions into hydroxide ions to maintain pH.

a. accepts hydrogen ions when acid is added to a solution

Which traits are characteristics of fungi? a. are heterotrophic b. cells lack chloroplasts c. make food through photosynthesis d. cells lack a nucleus

a. are heterotrophic b. cells lack chloroplasts

Plants synthesize their own food in the form of sugars during the process of photosynthesis. Which of the statements describe photosynthesis? a. converts carbon dioxide to sugars, releasing oxygen b. is a cellular process that occurs in the chloroplasts of plant cells c. produces sugars for the plant using only the nutrients in soil d. is a cellular process that occurs in the mitochondria of plant cells e. produces sugars for the plant using the energy from sunlight f. uses sugars to generate cellular energy, releasing carbon dioxide

a. converts carbon dioxide to sugars, releasing oxygen b. is a cellular process that occurs in the chloroplasts of plant cells f. uses sugars to generate cellular energy, releasing carbon dioxide

Consider the image of carbon. How many electrons are in the first and second electron shells of carbon, respectively? a. 0, 6 b. 2, 4 c. 6 d. 4, 2

b. 2, 4

Identify the key features that distinguish gymnosperms from angiosperms. a. Gymnosperms have a dominant gametophyte stage. b. Gymnosperms have cones instead of flowers. c. Only gymnosperms form a mega spore. d. Gymnosperms do not have fruit.

b. Gymnosperms have cones instead of flowers. d. Gymnosperms do not have fruit.

During the process of double fertilization in flowering plants, what is formed when the second sperm cell fuses with the two central nuclei in the female embryo sac? a. megaspore b. endosperm c. zygote d. gametophyte

b. endosperm

What property of water molecules leads to the high surface tension of liquid water? a. the small size of water molecules b. formation of hydrogen bonds between water molecules c. the high aðnity of water molecules for air d. formation of covalent bonds between water molecules

b. formation of hydrogen bonds between water molecules

Which are components of a lichen? a. vascular plants b. fungi c. photosynthetic microorganisms d. archaea

b. fungi c. photosynthetic microorganisms

Which plants are distinct clades of bryophytes? a. club mosses b. hornworts c. whisk ferns d. gingkos e. mosses

b. hornworts e. mosses

Which plant is a seedless plant that has a dominant gametophyte generation? a. sunflower b. moss c. pine tree d. fern

b. moss

Select all of the anatomical structures that are part of a complete flower. a. leaves b. petals c. sporangia d. sepals e. carpels f. stamens

b. petals d. sepals e .carpels f. stamens

Which of the properties is the unique, defining property of atoms of a particular element? a. isotope b. charge c. atomic number d. atomic mass

c. atomic number

Which statements describe fates of sperm cells that enter the ovule of an angiosperm? a. enters a synergid nucleus b. develops into a pollen grain c. fuses with two polar nuclei d. produces a zygote

c. fuses with two polar nuclei d. produces a zygote

Why do atoms form molecules? a. to achieve a stable number of protons b. to bring nuclei as close together as possible c. to achieve a stable number of electrons d. to become more polar

c. to achieve a stable number of electrons

An atom of carbon has six protons, six electrons, and six neutrons. What is the atomic mass of the carbon atom? a. 6, because the carbon atom has 6 protons b. 6, because the carbon atom has 6 electrons c. 18, because the carbon atom has 18 subatomic particles d. 12, because the carbon atom has 6 protons and 6 neutrons

d. 12, because the carbon atom has 6 protons and 6 neutrons

Recall that conifer pollen grains undergo mitotic division to produce sperm cells when they have reached the female gametophyte. Which statement best describes the means of sperm delivery in bryophytes and conifers? a. Bryophytes require insects or other animal pollinators to transfer sperm, whereas conifer pollen is airborne and does not require animal pollinators. b. Bryophytes sperm and conifer pollen both require wet environments for the sperm and pollen to reach the egg. c. Bryophyte sperm is flagellated and swims through water to reach the egg, whereas the air sacs found on conifer pollen facilitate its movement through water. d. Bryophyte sperm is flagellated and swims through water to reach the egg, whereas conifer pollen is airborne and does not require water.

d. Bryophyte sperm is flagellated and swims through water to reach the egg, whereas conifer pollen is airborne and does not require water.

How does 3H (hydrogen-3) differ from 1 H (hydrogen-1)? a. Hydrogen-3 has three neutrons, whereas hydrogen"1 has one neutron. b. Hydrogen-3 has three more protons than hydrogen"1 does. c. Hydrogen-3 has three protons, whereas hydrogen"1 has one proton. d. Hydrogen-3 has two more neutrons than hydrogen"1 does.

d. Hydrogen-3 has two more neutrons than hydrogen"1 does.

Which statement describes atomic mass? a. The atomic mass of an atom is the same as the atom's atomic number. b. The atomic mass of every atom of an element, such as carbon, is exactly the same. c. The atomic mass of an atom is the sum of the mass of its protons and electrons. d. The atomic mass of an atom is the sum of the mass of its protons, neutrons, and electrons.

d. The atomic mass of an atom is the sum of the mass of its protons, neutrons, and electrons.

Which of these organelles is not found in a fungal cell? a. mitochondria b. nucleus c. endoplasmic reticulum d. chloroplast

d. chloroplast

Fungi and plants form mutually beneficial symbiotic relationships called mycorrhizae. Classify the resources as supplied by the fungus the plant

supplied by the fungus - nitrogen - phosphorus - water the plant - sugar