BIOL 2251 Exam 1 – Questions With Step By Step
Solutions
Save
Terms in this set (148)
Characteristics that ...
distinguish animals from
other organisms (terms)
Organisms whose cells have a true nucleus enclosed
within a membrane. They include a wide range of life
Eukaryotes
forms, from single-celled protists to multicellular plants,
animals, and fungi.
Multicellular organisms are composed of multiple cells
organized into specialized structures, tissues, and
Multicellular
organs. Humans, animals, and many plants are examples
of multicellular organisms.
Organisms that obtain their organic molecules and
energy by consuming other organisms or organic
Heterotrophic
matter. Most animals are heterotrophic because they
feed on other organisms.
Germ layers are the primary cell layers formed during
embryonic development in animals. In vertebrates, they
are typically three germ layers:
- Ectoderm (outer layer)
Tissues (germ layers) - Mesoderm (middle layer)
- Endoderm (inner layer)
which give rise to various tissues and organs in the
body.
Sexual reproduction is a type of reproduction that
involves the fusion of specialized cells (gametes) from
Sexual Reproduction two parents to produce offspring with genetic variation.
It contrasts with asexual reproduction, which only
involves one parent.
, A zygote is the initial cell formed
when two gametes (sperm and
egg) fuse during fertilization. It is
Zygote
the first cell of a new organism
and contains the combined
genetic material of both parents.
Cleavage is the series of rapid
cell divisions that occur in the
early stages of embryonic
Cleavage
development, leading to the
formation of a multicellular
structure called a blastula.
A blastula is a hollow, ball-like
structure formed during the early
stages of embryonic
Blastula development through cleavage.
It is typically composed of a
single layer of cells surrounding a
fluid-filled cavity.
A gastrula is a stage in embryonic
development following the
blastula stage. During
gastrulation, the blastula
undergoes extensive cell
Gastrula
rearrangement and folding,
leading to the formation of the
three germ layers (ecto, meso,
and endo) and the development
of tissues and organs.
Gastrulation is the process by
which a blastula transforms into a
gastrula. It involves cell migration
Gastrulation and differentiation, resulting in
the formation of germ layers and
the organization of the
developing embryo.
, Hox genes are a group of highly
conserved genes that play a
crucial role in the development
of an organism's body plan and
the positioning of body segments
Hox Genes along the anterior-posterior axis.
They are involved in specifying
the identity of different body
segments during embryonic
development and are found in a
wide range of animals.
Practice ...
, (info from PP)->
Animals are multicellular, heterotrophic eukaryotes with
tissues that develop from embryonic layers
-> Nutritional Mode: Animals are heterotrophs that
ingest their food
-> Cell structure and Specialization:
- Animals are multicellular eukaryotes
- Their cells lack cell walls
- Their bodies are held together by structural proteins
such as collagen
- Tissues are groups of similar cells that act as a
functional unit
-> Reproduction and Development:
- Most animals reproduce sexually, with the diploid
stage usually dominating the life cycle
- After a sperm fertilizes an egg, the zygote undergoes
rapid cell division called cleavage
- Cleavage leads to the formation of a multicellular,
hollow blastula
- The blastula undergoes gastrulation, forming a
gastrula with different layers of embryonic tissues
1. What are the
characteristics that when EXTRA INFO
taken together sufficiently
describe an animal? - Eukaryotic: Animals have eukaryotic cells with a true
nucleus and membrane-bound organelles.
- Multicellular: They are multicellular organisms
composed of multiple specialized cells.
- Heterotrophic: Animals obtain their energy and
organic molecules by consuming other organisms or
organic matter.
- Lack of cell walls: Unlike plants and fungi, animals
typically lack cell walls made of cellulose or chitin.
- Motility: Most animals are capable of some form of
movement, whether it's locomotion, swimming, or flying.
Solutions
Save
Terms in this set (148)
Characteristics that ...
distinguish animals from
other organisms (terms)
Organisms whose cells have a true nucleus enclosed
within a membrane. They include a wide range of life
Eukaryotes
forms, from single-celled protists to multicellular plants,
animals, and fungi.
Multicellular organisms are composed of multiple cells
organized into specialized structures, tissues, and
Multicellular
organs. Humans, animals, and many plants are examples
of multicellular organisms.
Organisms that obtain their organic molecules and
energy by consuming other organisms or organic
Heterotrophic
matter. Most animals are heterotrophic because they
feed on other organisms.
Germ layers are the primary cell layers formed during
embryonic development in animals. In vertebrates, they
are typically three germ layers:
- Ectoderm (outer layer)
Tissues (germ layers) - Mesoderm (middle layer)
- Endoderm (inner layer)
which give rise to various tissues and organs in the
body.
Sexual reproduction is a type of reproduction that
involves the fusion of specialized cells (gametes) from
Sexual Reproduction two parents to produce offspring with genetic variation.
It contrasts with asexual reproduction, which only
involves one parent.
, A zygote is the initial cell formed
when two gametes (sperm and
egg) fuse during fertilization. It is
Zygote
the first cell of a new organism
and contains the combined
genetic material of both parents.
Cleavage is the series of rapid
cell divisions that occur in the
early stages of embryonic
Cleavage
development, leading to the
formation of a multicellular
structure called a blastula.
A blastula is a hollow, ball-like
structure formed during the early
stages of embryonic
Blastula development through cleavage.
It is typically composed of a
single layer of cells surrounding a
fluid-filled cavity.
A gastrula is a stage in embryonic
development following the
blastula stage. During
gastrulation, the blastula
undergoes extensive cell
Gastrula
rearrangement and folding,
leading to the formation of the
three germ layers (ecto, meso,
and endo) and the development
of tissues and organs.
Gastrulation is the process by
which a blastula transforms into a
gastrula. It involves cell migration
Gastrulation and differentiation, resulting in
the formation of germ layers and
the organization of the
developing embryo.
, Hox genes are a group of highly
conserved genes that play a
crucial role in the development
of an organism's body plan and
the positioning of body segments
Hox Genes along the anterior-posterior axis.
They are involved in specifying
the identity of different body
segments during embryonic
development and are found in a
wide range of animals.
Practice ...
, (info from PP)->
Animals are multicellular, heterotrophic eukaryotes with
tissues that develop from embryonic layers
-> Nutritional Mode: Animals are heterotrophs that
ingest their food
-> Cell structure and Specialization:
- Animals are multicellular eukaryotes
- Their cells lack cell walls
- Their bodies are held together by structural proteins
such as collagen
- Tissues are groups of similar cells that act as a
functional unit
-> Reproduction and Development:
- Most animals reproduce sexually, with the diploid
stage usually dominating the life cycle
- After a sperm fertilizes an egg, the zygote undergoes
rapid cell division called cleavage
- Cleavage leads to the formation of a multicellular,
hollow blastula
- The blastula undergoes gastrulation, forming a
gastrula with different layers of embryonic tissues
1. What are the
characteristics that when EXTRA INFO
taken together sufficiently
describe an animal? - Eukaryotic: Animals have eukaryotic cells with a true
nucleus and membrane-bound organelles.
- Multicellular: They are multicellular organisms
composed of multiple specialized cells.
- Heterotrophic: Animals obtain their energy and
organic molecules by consuming other organisms or
organic matter.
- Lack of cell walls: Unlike plants and fungi, animals
typically lack cell walls made of cellulose or chitin.
- Motility: Most animals are capable of some form of
movement, whether it's locomotion, swimming, or flying.
