If you say that someone has no backbone, you think that they do not have the courage to do things which need to be done. You might be taking drastic measures and you’ve got to have the backbone to do that. Synonyms: strength of character, will, character, bottle [British, slang] More Synonyms of backbone.

spinal column , vertebral column .

The term “osseous”, and the prefix “osteo-“, referring to things related to bone, are still used commonly today.

1 : the column of bones in the back enclosing and protecting the spinal cord : spinal column. 2 : the strongest part of something He is the backbone of the family. 3 : strength of character.

The backbone is the vertebral column of the vertebrate. The backbone is made up of the bones, muscles, tendons and other tissues that reach from the base of the skull to the tailbone. The backbone encloses the spinal cord and the fluid surrounding the spinal cord.

put backbone into someone As a metaphor for ‘firmness of character’, backbone dates from the mid 19th century. 1998 Spectator There is a widespread belief that if only Mrs Thatcher had still been in No. 10, she would have put backbone into Bush and got rid of Saddam .

What is a backbone, anyway? A backbone is a symbol of strength in character, an unwillingness to be used or taken for granted, and a firm commitment to uphold one’s decisions and feelings. We’ve all seen and heard of people who have a backbone; they are the strong ones, the ones who get what they want.

invertebrate

• Mammals – Almost every mammal gives live birth (except the platypus and the echidna).
• Reptiles – Most lay eggs, but there are numerous snakes and lizards that give live birth.
• Fish – A very small percentage of fish are known to give live birth, including some sharks!

Aphid. Aphids, tiny insects found the world over, are “essentially born pregnant,” says Ed Spevak, curator of invertebrates at the St. Louis Zoo.

Explanation: ➢ Eagles are a kind of bird that hatches from the egg and eagles doesn’t give birth alive like from the given choices above which can give birth to alive animals such as dog, whale and pig.

Chicken (hen) gives us both egg and meat. Duck gives us both egg and meat. Duck’s egg and meat are also eaten.

Explanation: Because chicken is chiken and fish is fish, they are not the same animals, and they don’t live in the same place, because chikens live inthe ground and fish live in sea, and they are not the same type of animals, which means that chicken can never had a baby fish.

Phylum porifera are multicellular organisms that have bodies full of pores and channels allowing water to circulate through them, consisting of jelly-like mesohyl sandwiched between two thin layers of cells.

They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through them, consisting of jelly-like mesohyl sandwiched between two thin layers of cells….Distinguishing features.

leuconoid

The approximately 5,000 living sponge species are classified in the phylum Porifera, which is composed of three distinct groups, the Hexactinellida (glass sponges), the Demospongia, and the Calcarea (calcareous sponges).

The body of a simple sponge resembles a sac perforated with holes. – Water is drawn through the pores into a central cavity, the spongocoel, and flows out through a larger opening, the osculum.

bilateral

Although sponges do not have organized tissue, they depend on specialized cells, such as choanocytes, porocytes, amoebocytes, and pinacocytes, for specialized functions within their bodies. The mesohyl acts as a type of endoskeleton, helping to maintain the tubular shape of sponges.

A spongocoel (/ˈspɒŋɡoʊˌsiːl/), also called paragaster (or paragastric cavity), is the large, central cavity of sponges. Water enters the spongocoel through hundreds of tiny pores (ostia) and exits through the larger opening (osculum).

Spongocoel is a large, central cavity of sponges from where water enters. The spongocoel is surrounded by a lining of cells called choanocytes, containing a central flagellum that is surrounded by microvilli. Additional Information: -The spongocoel can be a simple inner space or branched complex inner structure.

zoology. : one of the openings by which the water passes out of a radial canal or flagellated chamber of a sponge.

: the internal cavity of a sponge discharging by way of the osculum.

oyster