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Maru [420]
3 years ago
10

Duck-billed platypus is called a bridge animal, why?​

Biology
1 answer:
xxMikexx [17]3 years ago
4 0

Answer:

The platypus serves as a 'bridge' animal between nonmammals like birds and reptiles, which maintain their testicles in their body cavity, and placental and marsupial mammals, which hold their testes in an external scrotum."

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Describe how humans’ way of life has changed. Begin with hunter-gatherers and end with life after the Industrial Revolution.
iragen [17]

Answer:

Ever since the existence of life of humans on Earth, the humans have been making progress to understand themselves and the mother nature.

In the start, the humans were hunter- gatherers. Hunter- gatherers can be described as humans which use wild life plants and animals for food. The humans used to live in jungles and eat the wild- life plants and animals. They used leaves from the trees to cover their bodies. Heat was produced by rubbing the rocks.

After this time, the humans learned the techniques of cultivating plants for food. They started cultivating crops and depend on them for living. During this time, humans learned the art of farming and agriculture. But they couldn't understand the effects of various pathogens infecting the crops and humans at that time.

After this time, humans learned the art of preserving foods in different forms like pickles etc. They also learned that certain types of plants could be used to treat wounds and other diseases.

With the passage of time, people learned to make and use machinery for making their tasks easier. The usage of machinery progressed rapidly and the industrial revolution began. People became more diverted to this sector rather than farming. They started to move towards the cities to find better jobs in industries.

Life after industrial revolution was much easier as humans had made a lot of equipments which aid them to have a better life style. Science has been developing since that time day by day.

Explanation:

4 0
3 years ago
Which structure does a virus have in common with a prokaryotic cell?
andrew-mc [135]

Answer:

Explanation:

cell-wall

3 0
2 years ago
Read 2 more answers
What is the most important distinction between the membrane transporters known as channel proteins and those known as carrier pr
-Dominant- [34]

Answer:

Channel proteins form hydrophilic channels to passively transport substances down the concentration gradient.

Carrier proteins bind to substances to transport them actively against the concentration gradient. They do not form channels.

Explanation:

Channel proteins are the membrane proteins that serve in transport of small polar molecules and/or ions by making a hydrophilic pore across the membrane. These molecules diffusion through the pore and exhibit facilitated diffusion.  

Carrier proteins are the membrane proteins that transport the substances across the membrane by binding to them. They do not form the hydrophilic channels. Carrier proteins serve in the active transport of molecules against the concentration gradient.

6 0
3 years ago
Which type of cells are being displayed?
dem82 [27]
Where are the cells ?
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3 years ago
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Need answer quick please thanks
LekaFEV [45]
I honestly think it’s the second one
Sorry if I’m wrong
6 0
3 years ago
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