Anoa's 4th Grade Science - Chapter 3

An animal with a backbone is called a vertebrate because vertebrates are characterized by having a spinal column or backbone. This feature provides support and protection for the central nervous system. Vertebrates include mammals, birds, reptiles, amphibians, and fish. They are distinguished from invertebrates, which do not have a backbone. Producers and symmetry are not relevant terms in this context.

An animal without a backbone is called an invertebrate. Invertebrates make up the majority of animal species and include organisms such as insects, worms, and jellyfish. Unlike vertebrates, which have a backbone or spinal column, invertebrates lack this skeletal structure. This characteristic allows them to have a wide range of body shapes and sizes. Invertebrates play crucial roles in various ecosystems and have diverse adaptations for survival.

Many different food chains in an ecosystem are interconnected and form a complex network known as a food web. In a food web, multiple food chains overlap and interact, illustrating the flow of energy and nutrients through various organisms in an ecosystem. This interconnectedness allows for a more accurate representation of the relationships and dependencies between different species within the ecosystem.

Animals get energy from food because food contains nutrients that can be broken down through digestion. These nutrients, such as carbohydrates, proteins, and fats, are then converted into energy through metabolic processes like cellular respiration. This energy is essential for animals to perform various biological functions, including movement, growth, and reproduction. While sunlight is a source of energy for plants through photosynthesis, animals cannot directly obtain energy from sunlight. Similarly, soda and electricity do not provide the necessary nutrients for animals to derive energy.

Producers are organisms that use energy from the Sun to make food through the process of photosynthesis. They convert sunlight, water, and carbon dioxide into glucose and oxygen, which is essential for their survival. Producers, such as plants and some types of bacteria, form the base of the food chain as they provide energy and nutrients for other organisms. Therefore, the given correct answer, "producers," accurately describes the organisms that use energy from the Sun to make food in a food chain.

Animal cells do not have chlorophyll, which is a pigment found in plant cells. Chlorophyll is responsible for capturing sunlight and converting it into energy through the process of photosynthesis. Since animal cells do not perform photosynthesis, they do not require chlorophyll. Instead, animal cells obtain energy through other means, such as consuming other organisms or absorbing nutrients from their environment. Therefore, the statement "Animal cells don't have chlorophyll" is true.

Fungi and bacteria are decomposers because they have the ability to break down dead organisms. They play a crucial role in the ecosystem by decomposing organic matter and recycling nutrients back into the environment. Fungi and bacteria secrete enzymes that break down complex organic molecules into simpler forms, allowing them to be absorbed and utilized by other organisms. Without decomposers, dead organisms would accumulate, and nutrients would not be recycled, leading to an imbalance in the ecosystem.

The correct answer is "symmetry". Symmetry refers to a balanced arrangement of parts that are identical or nearly identical on opposite sides of a dividing line or axis. When body parts have symmetry, it means that they can be folded over and the two sides will match up as mirror images. "Symetry" is an incorrect spelling of the word.

An animal with two sides that are mirror images of each other has bilateral symmetry. This means that if you were to draw a line down the center of the animal, the two sides would be identical. This type of symmetry is commonly found in animals that have a distinct front and back, such as humans. It allows for efficient movement and coordination, as the body can be divided into specialized regions for different functions.

An animal with a definite front end, back end, upper side, and lower side has bilateral symmetry. This means that the animal can be divided into two equal halves along a single plane, resulting in mirror images. This type of symmetry is commonly found in animals that have a distinct head and tail, such as humans, dogs, and fish. It allows for efficient movement and specialization of body parts.

The correct answer describes "no symmetry" or "asymmetry" as a situation where, no matter how the object is folded, the parts do not match. This implies that the object does not possess any kind of symmetry, such as reflectional symmetry or rotational symmetry.

A food chain refers to the sequence of organisms through which energy is transferred in an ecosystem. It represents the flow of energy from one organism to another, starting with producers (plants) and ending with decomposers. Each organism in the chain depends on the organism before it for energy, creating a linear pathway of energy transfer. The concept of a food chain helps us understand how energy is transferred and how different organisms are interconnected in an ecosystem.

An animal with radial symmetry has body parts that extend outward from a central point. This means that if you were to draw lines through the central point, the animal's body parts would be arranged symmetrically around these lines. This type of symmetry is commonly found in organisms such as jellyfish and starfish, where their body parts radiate outwards from a central axis, allowing them to interact with their environment from all directions.

An animal with bilateral symmetry has only two sides that are mirror images. You could fold a butterfly only one way through its center to have it match up.

Some animals change their form as they grow.

Animals cannot make food like plants because they lack the ability to perform photosynthesis. Plants have specialized structures called chloroplasts that contain chlorophyll, which enables them to convert sunlight into energy and synthesize their own food through photosynthesis. In contrast, animals rely on consuming organic matter, such as plants or other animals, to obtain the nutrients they need for energy and growth. They do not possess the necessary cellular machinery or metabolic pathways to produce food from inorganic substances like carbon dioxide and water.

Bilateral symmetry refers to an organism or object having only two sides that are mirror images of each other. This means that if you were to fold it through its center, the two halves would perfectly match. This characteristic is commonly found in many living organisms, including humans, where the left and right sides of the body are symmetrical.

Radial symmetry refers to body parts that extend outward from a central point and their parts match. This means that if you were to fold the organism along any plane passing through its central point, the two halves would be identical. This type of symmetry is commonly found in organisms such as starfish and jellyfish.

A sponge is an example of an animal with no symmetry because it does not have any definite shape or pattern that can be divided into equal halves. Unlike animals with radial or bilateral symmetry, such as starfish or rabbits, a sponge lacks any clear organization or symmetry in its body structure.

Primary consumers eat producers and obtain energy from them. However, they do not utilize all of this energy for their own life functions. Some of the energy is lost as heat or used in metabolic processes, such as digestion and respiration. Therefore, the correct answer is "consumers."

Secondary consumers get energy by eating other consumers, which includes both consumers from the same trophic level (other secondary consumers) as well as consumers from lower trophic levels (primary consumers). This process of consuming other organisms allows secondary consumers to obtain the energy stored in the tissues of these organisms, enabling their own growth and survival. By feeding on other consumers, secondary consumers play a crucial role in energy transfer and nutrient cycling within an ecosystem.

Primary consumers eat producers, such as plants, and obtain energy from them. They use some of this energy to carry out life functions, such as growth, reproduction, and metabolism. However, they are not able to efficiently convert all of the energy they consume into their own biomass. As a result, they lose some of the energy as waste, which is then available for other consumers in the ecosystem to utilize.

An animal with radial symmetry has body parts that extend outward froma central point. You could fold a sea star thorugh its center five ways and it would match up.

Animals have many charactyeristics in common. They are made of cells, they reproduce, they move, the grown and change and they eat food. However they are different in many ways too. One major difference is having or not having a backbone. Another differenece among animials is the way their body parts match up around a point or center line.

Some animals have no symmetry. One example is a sponge, the simplest kind of invertebrate. No matter how you might fold a sponge, its body parts do not match up.

Animals move to find food and water because they need sustenance to survive. They also move to find mates in order to reproduce and ensure the survival of their species. Animals may move to new homes to seek better resources or to escape unfavorable conditions. Finally, animals may move to escape from predators or other threats in order to increase their chances of survival.

The given answer includes a list of actions or characteristics that are common to all animals. Animals have the ability to move, eat, sleep, reproduce, and change. These actions are essential for their survival and are found in all animal species, regardless of their size, habitat, or other unique features.