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3 years ago

Animal cells contain all of the following structures EXCEPT a what?

Biology

2 answers:

Inessa05 [86]3 years ago

6 0

They don't have chloroplasts.

weeeeeb [17]3 years ago

5 0

They do not have a cell wall because only plant cells have that. The plant cells have that to help with the process for creating the green color. The animal cells, instead, they have a cell membrane.

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Which scientist would agree with this statement: Giraffes all had short necks originally. Individual giraffes stretched their ne

anyanavicka [17]

Answer:

Jean-Baptiste de Lamarck

Explanation:

His two principles were "use and disuse" and "inheritance of acquired characteristics." The latter is what the statement is referring to.

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3 years ago

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What does it mean when scientists say that living organisms share a universal genetic code?

dem82 [27]

I think the mean DNA but don't quote me on that.

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3 years ago

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Rabbits, turtles, fish, humans, and whales all share certain characteristics but also differ from each other. All of these speci

Delvig [45]

The levels of organisation are

Domain: Eukarya

Kingdom Animalia

Phylum :Chordata

Explanation:

They all share these levels of organisation because;

for the Domain Eukarya, they have;

→multi-cellular cells containing nucleus; and other membrane bound organelle.e.g Mitochondrial.

→their DNA located in the nucleus packaged as linear chromosomes bounded by histone proteins.

→mode of reproduction which is sexual.

They share Kingdom Animalia because;

→they have multi-cellular, specialised cells, bounded by plasma membranes.

→they have specialized tissues, organs, and system.

→they all undergo heterotrophic mode of nutrition as evident in the question 'that they must consume plants and animals as source of energy'

→they exchanged communication by nervous ssytem and 

→ use homeostatic mechanisms to regulate water balance of the body through the kidney.

→Humans,Rabbits,and whales are VIVIPAROUS; they give birth to young ones alive.

→Most fishes lay eggs to reproduce, they are said to be Ovoviviparous.

They belong to phylum Chordata because ;

→they all have noto chord; which serve as template for axial skeleton.

dorsal hollow nerve cord -template for the brain and spinal cord

→pharyngeal slits- templates for gill aches in bony fishes and components of inner ear in land animals.

→ tail length varies in these organisms.

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3 years ago

Pure water has a pH of 7. Pure water ______

kykrilka [37]

Pure water has a pH of 7. Pure water is neutral.

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3 years ago

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30 PONITS BEST ANSWER

nexus9112 [7]

Touching a hot pan and yanking your hand away--That is nervous system. Going through puberty is controlled by the pituitary gland. jumping up and down is controlled by the muscular system. Breathing harder during a jog is controlled by the respiratory system. Getting energy to sit through class by eating cereal and a banana is controlled by digestive system and muscular system. hope it helps

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2 years ago