1.
What is the main difference between an animal cell and a plant cell?
Correct Answer
B. Plant cells have cell walls and chloropHyll, while animal cells do not.
Explanation
Plant cells have a rigid cell wall made of cellulose that provides structural support and protection. They also contain chloroplasts, which are essential for photosynthesis, allowing plants to convert light energy into chemical energy. These features are not present in animal cells. Animal cells only have a cell membrane and lack both cell walls and chloroplasts.
2.
Check off each answer that is true.
Correct Answer(s)
A. Different kinds of cells do different kinds of jobs.
B. Cells are organized into "strings" called tissues.
Explanation
The given answer is correct because it accurately states two true statements. Different kinds of cells do indeed perform different functions in the body, as each type of cell is specialized to carry out a specific task. Additionally, cells are organized into tissues, which are groups of cells that work together to perform a specific function.
3.
True or false? Liverworts and mosses are vascular plants.
Correct Answer
B. False
Explanation
Liverworts and mosses are non-vascular plants. They belong to a group called bryophytes, which lack the vascular tissues (xylem and phloem) that are present in vascular plants. These tissues are responsible for transporting water, nutrients, and food throughout the plant. Instead, liverworts and mosses rely on diffusion and osmosis to move water and nutrients, which limits their size and the habitats in which they can thrive.
4.
In 350 B.C., what Greek scientist classified plants into herbs, shrubs, and trees?
Correct Answer
B. Aristotle
Explanation
Aristotle, the renowned Greek philosopher and scientist, made substantial contributions to various fields, including biology. He classified plants into herbs, shrubs, and trees, laying the groundwork for future botanical studies. His student, Theophrastus, further developed these classifications and is often referred to as the "Father of Botany" for his detailed works on plant biology.
5.
Which of the following groups includes vascular seed plants?
Correct Answer
C. Gymnosperms
Explanation
Vascular seed plants are plants that have specialized tissues (xylem and phloem) for transporting water, nutrients, and food throughout the plant, and they reproduce via seeds. Gymnosperms and angiosperms are the two main groups of vascular seed plants. Gymnosperms include conifers, cycads, ginkgo, and gnetophytes. Bryophytes (mosses, liverworts, and hornworts) and algae are non-seed plants, while pteridophytes (ferns and their relatives) are vascular plants that reproduce via spores, not seeds.
6.
Horsetails are seedless. True or false?
Correct Answer
A. True
Explanation
Horsetails are seedless plants. They belong to a group called Pteridophytes, which also includes ferns. These plants reproduce via spores rather than seeds. Horsetails have vascular tissues (xylem and phloem) but do not produce seeds, instead relying on spore dispersal for reproduction.
7.
The plant kingdom is divided into groups called_________.
Correct Answer
B. Divisions
Explanation
The plant kingdom is divided into groups called divisions. Divisions are the primary taxonomic ranks below the kingdom level and are used to categorize and classify plants based on their characteristics and evolutionary relationships. Each division represents a distinct group of plants that share common features and traits. This classification system helps scientists and botanists organize and study the vast diversity of plant species.
8.
Do flatworms have a nerve cord?
Correct Answer
A. Yes.
Explanation
Yes, flatworms do have a nerve cord. They possess a simple nervous system with a pair of nerve cords running along the length of their body, connected by transverse nerves. This nerve cord helps in coordinating movements and responses to stimuli in flatworms.
9.
Check off every answer that is an animal with a nerve cord.
Correct Answer(s)
B. Fish
C. Birds
E. Reptiles
F. AmpHibians
Explanation
Animals with a nerve cord belong to the phylum Chordata, which includes vertebrates such as fish, birds, reptiles, and amphibians. Arthropods and flatworms do not have a nerve cord; arthropods have a ventral nerve cord and flatworms have a nerve net or ladder-like nervous system. Therefore, the correct answers are:
10.
Animals are grouped into two kingdoms. True or false?
Correct Answer
B. False
Explanation
Animals are grouped into one kingdom, the Animalia (or Metazoa) kingdom. The kingdom Animalia includes all animals, which are multicellular, eukaryotic organisms that typically have specialized tissues and organs. The classification system used in biology includes multiple kingdoms such as Plantae, Fungi, Protista, and Monera (for prokaryotes like bacteria), but animals themselves are all classified under the single kingdom Animalia.
11.
Do fungi make their own food like plants do?
Correct Answer
B. No.
Explanation
Fungi do not make their own food like plants do. Plants are autotrophs, meaning they produce their own food through photosynthesis, using sunlight, carbon dioxide, and water. Fungi, on the other hand, are heterotrophs. They obtain their food by absorbing nutrients from other organisms, either through decomposing organic material or through parasitic relationships with living organisms. Fungi secrete enzymes that break down complex substances into simpler compounds, which they then absorb.
12.
Which of the following is a characteristic of fungi?
Correct Answer
C. They have cell walls made of chitin.
Explanation
Fungi are characterized by having cell walls made of chitin, a strong, flexible polysaccharide. Unlike plants, fungi are heterotrophic, meaning they do not perform photosynthesis and cannot produce their own food. Instead, they obtain nutrients by decomposing organic material or through parasitic relationships. Fungi can reproduce both sexually and asexually, depending on the species and environmental conditions.
13.
Clear water can be home to millions of microscopic living beings that belong to the _______ kingdom.
Correct Answer
B. Protista
Explanation
The kingdom Protista includes a diverse group of microscopic organisms that often live in aquatic environments, including clear water. These organisms can be unicellular or simple multicellular and include protozoa, algae, and slime molds. They play essential roles in aquatic ecosystems, such as producing oxygen and serving as a food source for other organisms.
14.
Check each box that is a protist.
Correct Answer(s)
A. Diatoms
D. Euglenas
E. Green algae
Explanation
Protists are a diverse group of eukaryotic microorganisms, which include diatoms, euglenas, and green algae. These organisms are distinct from bacteria and cyanobacteria, which are prokaryotes and do not belong to the kingdom Protista.
15.
Some protists use photosynthesis to create food for themselves. True or false?
Correct Answer
A. True
Explanation
Some protists, such as algae and euglenas, contain chloroplasts and use photosynthesis to produce their own food, similar to plants. These protists convert light energy into chemical energy, making them autotrophic organisms.
16.
Protists have a nucleus. True or false?
Correct Answer
A. True
Explanation
Protists are eukaryotic organisms, which means they have a defined nucleus that contains their genetic material. This is a key characteristic that distinguishes them from prokaryotic organisms, such as bacteria, which lack a nucleus.
17.
Which of the following is a characteristic of bacteria?
Correct Answer
C. They reproduce by binary fission.
Explanation
Bacteria are unicellular prokaryotic organisms that lack a nucleus. They reproduce asexually through a process called binary fission, where a single bacterial cell divides into two identical daughter cells. Unlike plants, bacteria do not have chloroplasts; however, some bacteria can perform photosynthesis using different structures and pigments.