How is a dart frog, and a hosta plant alike? compare and contrast these two.
(if you use your own words you will get brainliest:)

These amphibians are often called "dart frogs" due to the Native Americans' use of their toxic secretions to poison the tips of blowdarts.

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Poison dart frog.

             Poison dart frogs (Dendrobatidae)

Class:                    Amphibia

Order:                Anura

Superfamily :    Dendrobatoidea

Family:            Dendrobatidae Cope, 1865

Poison dart frog (also known as dart-poison frog, poison frog or formerly known as poison arrow frog) is the common name of a group of frogs in the family Dendrobatidae which are native to tropical Central and South America. These species are diurnal and often have brightly colored bodies. This bright coloration is correlated with the toxicity of the species, making them aposematic. Some species of the family Dendrobatidae exhibit extremely bright coloration along with high toxicity, while others have cryptic coloration with minimal to no amount of observed toxicity. The species that have great toxicity derive this from their diet of ants, mites and termites. Other species however, that exhibit cryptic coloration and low to no amounts of toxicity, eat a much larger variety of prey.Many species of this family are threatened due to human infrastructure encroaching on their habitats.

These amphibians are often called "dart frogs" due to the Native Americans' use of their toxic secretions to poison the tips of blowdarts. However, of over 170 species, only four have been documented as being used for this purpose (curare plants are more commonly used), all of which come from the genus Phyllobates, which is characterized by the relatively large size and high levels of toxicity of its members.

Hostas and Yews are dependable standbys for shade, but there are many alternatives you may not have considered yet. Calycanthus, Itea, Tiarella and Coleus light up shady landscapes with their colorful foliage and fragrant blooms.

Explanation:

The steps indicate the transmission of nerve impulse to skeletal muscles and contraction of sarcomere.

Explanation:

Muscle contraction is an anatomical and physiological alteration occurs in response to a biochemical pathway. Here is the contraction of single contractile unit (sarcomere) of muscle is discussed. Muscle contract in a way of all or none.

1) An impulse is conducted along the sarcolemma and then deep into the muscle fiber by the T tubule

2) Acetylocholine is released into the synaptic cleft and diffuses across it.

3) The sarcoplasmic reticulum releases calcium ions which diffuse into the sarcoplasm around the myofibril and bind to troponin.

4) Myosin cross bridges bind to Actin and contract

5) The troponin-tropomyosin complex moves exposing active sites on Actin