Which was one of the first animals to develop a true body cavity?

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Answer 1
Answer: The answer is mollusks and annelids.

Coelomates are animals which body cavity (coelom) is filled with fluid. Fluid surrounds organs, protects them and allows their free movement and growth. All vertebrates and some invertebrates, such as mollusks, annelids, and arthropods, are coelomates.


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Chemical and gaseous exchange takes place __________.
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Define the term tissue as used in this passage.

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In the context of the passage, the term "tissue" refers to a group or collection of specialized cells that work together to perform a specific function within an organism. Tissues are one of the fundamental building blocks of multicellular organisms, including humans and other animals.

Different types of tissues exist in the body, each with distinct structures and functions. Some common types of tissues in the human body include epithelial tissue (covering and lining tissues), connective tissue (supportive and protective tissues), muscle tissue (responsible for movement), and nervous tissue (involved in transmitting nerve signals).

Together, these various tissues form organs, which, in turn, contribute to the proper functioning of systems within the organism. For example, the lungs are composed of tissues that facilitate gas exchange, and the heart is made up of tissues that pump blood throughout the body. The cooperation and coordination of different tissues allow an organism to carry out essential life processes and maintain its overall function and well-being.

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The complete question is : Define the term tissue as used in this passage.

In vascular plants, such as angiosperms and gymnosperms, cell division takes place almost exclusively in specific tissues known as meristems. Apical meristems, which are located at the tips of shoots and roots in all vascular plants, give rise to three types of primary meristems, which in turn produce the mature primary tissues of the plant. The three kinds of mature tissues are dermal, vascular, and ground tissues. Primary dermal tissues, called epidermis, make up the outer layer of all plant organs (e.g., stems, roots, leaves, flowers). They help deter excess water loss and invasion by insects and microorganisms. The vascular tissues are of two kinds: water-transporting xylem and food-transporting phloem. Primary xylem and phloem are arranged in vascular bundles that run the length of the plant from roots to leaves. The ground tissues, which comprise the remaining plant matter, include various support, storage, and photosynthetic tissues. In vascular plants, such as angiosperms and gymnosperms, cell division takes place almost exclusively in specific tissues known as meristems. Apical meristems, which are located at the tips of shoots and roots in all vascular plants, give rise to three types of primary meristems, which in turn produce the mature primary tissues of the plant. The three kinds of mature tissues are dermal, vascular, and ground tissues. Primary dermal tissues, called epidermis, make up the outer layer of all plant organs (e.g., stems, roots, leaves, flowers). They help deter excess water loss and invasion by insects and microorganisms. The vascular tissues are of two kinds: water-transporting xylem and food-transporting phloem. Primary xylem and phloem are arranged in vascular bundles that run the length of the plant from roots to leaves. The ground tissues, which comprise the remaining plant matter, include various support, storage, and photosynthetic tissues.

Answer:

tissue is a cellular organisational level between cells and a complete organ. A tissue is an ensemble of similar cells and their extracellular matrix from the same origin that together carry out a specific function. Organs are then formed by the functional grouping together of multiple tissues.

Explanation:

Which is a logical predator-prey relationship?

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Predator and prey are both dependent on each other. The absence of one organism will give the other a hard time to leave. Prey is the food of predator the more prey the more food for the predator. When the predator dies the decomposed body will give the prey energy to grow and share its nutrient to its predator and prey to the other

A moray eel eats a fish swimming by

A polar bear catches a seal for dinner

Cell division is preceded by two growth phases. Besides growth, both G1 and G2a. contain checkpoints that determine if the cycle will continue.
b. help move chromosomes to the new daughter cells.
c. produce more chromosomes before the cell divides.
d. grow and produce enough cytoplasm to fill two cells.

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The answer is a. contain checkpoints that determine if the cycle will continue. Cell cycle checkpoint are important mechanisms that control cell division. There are two checkpoints during the cell cycle: G1 and G2 checkpoint. The G1 checkpoint is right before the S phase. If something is wrong at the G1 checkpoint, the cell will not enter the S phase where DNA replication starts. The G2 checkpoint (DNA damage checkpoint) is right before the M phase. If DNA is damaged, the cell will not enter the M phase (mitosis).

Proximal tubule: The simple cuboidal cells of the proximal tubule are called _______ cells

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Answer:

brush border cells....!!

Final answer:

The simple cuboidal cells of the proximal tubule are referred to as Proximal Convoluted Tubule (PCT) cells.

Explanation:

They have a distinct feature of having prominent microvilli on their luminal surface that forms a brush border.

These microvilli contribute to creating a large surface area which facilitates the maximization of the absorption and secretion of solutes including Na+, Cl¯, glucose, among others - a key function of this portion of the nephron.

These cells are responsible for the active transport of ions across their membranes and hence they possess a high concentration of mitochondria to produce sufficient ATP.

The PCT cells, forming a simple cuboidal epithelium, are active in secretion and absorption of molecules.

They are observed in the lining of the kidney tubules and are critical to the kidney's filtration function.

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Visible light specturm ranges between infrared rays and ultraviolet rays

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True. Any color of light is nothing but an electromagnetic wave that enables us to see things around us. Humans mostly can see wavelengths between the Electromagnetic spectrum and the Ultra violet region. The wavelength of green light is longer by a small margin than the wavelength of the blue light. Red light has the highest wavelength among all the available colors of light. 

In mitosis or a single cell, the nucleus

Answers

Answer:

celula

Explanation: