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3 years ago

The birds Darwin thought were wrens, warblers, and blackbirds were actually what?

Biology

2 answers:

alina1380 [7]3 years ago

5 0

Answer:

the little brown birds that Darwin thought were wrens, warblers, and blackbirds were actually all species of finches

djverab [1.8K]3 years ago

5 0

Even more surprising, the brown birds that Darwin had thought to be wrens, warblers, and blackbirds were all finches. They too, were found nowhere else. The same was true of the Galapagos tortoixes, the murine iguanas, and many plants that Darwin had collected on the islands.

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Why do complex organisms need specialized cells

Bess [88]

Complex organisms need cells that can perform many different functions. they need to be supported on a cellular level. Without specialized cells you they won't be able to perform different functions.

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3 years ago

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Waves can be classified as transverse, longitudinal, or surface waves. This depends on the ___________ of movement of the ______

Alex73 [517]

Answer:

direction, vibration

Explanation:

Hope this answer helped!

- hershy103

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3 years ago

Eukaryotes that are not closely related and that do not share many anatomical similarities can still be placed together on the s

lozanna [386]

Answer:

Homologous genes that are highly conserved.

Explanation:

Phylogenetic trees are diagrams that represent evolutionary relationship between organisms.

It is set to represent the hypothesis that a set of species evolved fro the same ancestor.

Anatomical similarities are considered in the construction of the trees.

However , two organisms can be placed in the same tree by comparing their genes.

If the two eukaryotes have genes that are highly conserved that similar.

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3 years ago

Match the cell adhesion or junction with the appropriate choice. Drag the terms on the left to the appropriate blanks on the rig

pav-90 [236]

Answer:

The missing options are:

A) protein subunits associated with gap junctions.

B) a type of adhesive junction connecting an epithelial cell to the basal lamina.

C) collection of fibrous intracellular attachment proteins.

D) create a permeability barrier.

E) button-like points of strong adhesion between two cells.

F) hollow cylinders associated with gap junctions.

G) type of adherens junction connecting cells with the extracellular matrix.

H) intermediate filaments associated with plaques.

I) collection of adherens junctions particularly associated with epithelial cells.

J) type of adhesive junction containing actin microfilaments.

K) specialized modifications of the cell membrane in which two cells come together in multicellular organisms.

L) point of cytoplasmic contact between two cells.

M) anchors cytoskeleton of one cell with that of a neighboring cell.

Set of answers are:

A) protein subunits associated with gap junctions. Conexin

B) a type of adhesive junction connecting an epithelial cell to the basal lamina. Hemidesmosome

C) collection of fibrous intracellular attachment proteins. Plaque

D) create a permeability barrier. Tight junctions

E) button-like points of strong adhesion between two cells. Desmosome

F) hollow cylinders associated with gap junctions. Connexons

G) type of adherens junction connecting cells with the extracellular matrix. focal adhesion

H) intermediate filaments associated with plaques. Tonofilaments

I) collection of adherens junctions particularly associated with epithelial cells.

J) type of adhesive junction containing actin microfilaments. Adherens junctions

K) specialized modifications of the cell membrane in which two cells come together in multicellular organisms. Cell junctions

L) point of cytoplasmic contact between two cells. Gap junction

M) anchors cytoskeleton of one cell with that of a neighboring cell. Adhesive junction

Explanation:

Connexin: is a transmembrane protein that forms the gap junctions, they are also called gap junctions proteins.

Hemidesmosome junctions: these types of junctions are in the epidermis, specifically between the epithelial cells and the basal lamina of the epidermis.

Plaque: they are part of the adherens junctions, they are fibrous proteins that are attached to certain points of the extracellular matrix.

Tight junctions: are junctions between two epithelia, they are very restrictive and do not allow the passage of soluble molecules creating a permeability barrier.

Desmosomes: are very strong cell to cell junctions on the lateral sides of plasma membranes. They are in tissues that are under mechanical stress, such as the cardiac muscle.

Connexons: is a pore made of six connexin proteins in a gap junction. Connexons are the ones that connect two cells in gap junctions.

Focal adhesions: They connect the extracellular matrix with the cell, regulatory signs and mechanical force is transmitted through them.

Tonofilaments: tonofilaments are the ones that are associated with a plaque in adherens junctions, they are in epithelial tissues.

Adherens junctions: are cell to cell junctions where the cytoplasmatic face is connected to the actin cytoskeleton. They appear as spots forming the plaque or as zonula adherens, which are actin bands around the cell.

Cell junctions are protein complexes that connect two cells that are next to each other or a cell with the extracellular matrix. They have a lot of functions, such as pas information from cell to cell, or the exterior, form a barrier, synchronize cells, etc.

Gap junctions: are connections between the cytoplasm of two cells, molecules and, ions pass directly from one cell to the other.

8 0

3 years ago

Functionalists would view gender roles in which of the following ways?Gender roles assist in keeping women oppressed within the

Liono4ka [1.6K]

Answer:

Gender roles are necessary to keep the family in balance.

Explanation:

Functionalists perspective of gender roles view conventional gender roles as necessary to commit to family functioning as it tends towards keeping the family balance: Women take on the “expressive” character of putting up with household chores and giving emotional care, grooming and nurturing of family members, while men take on the “instrumental” character of acquiring income and undertaking important family decisions.

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4 years ago