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kvv77 [185]
3 years ago
12

During which period did mammals first appear?

Biology
2 answers:
Anit [1.1K]3 years ago
7 0

Answer:

The correct answer is - d. Jurassic.

Explanation:

algol [13]3 years ago
3 0

Answer:

the Triassic Period

Explanation:

hope it helps

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If you were an electron, and your home town was your nucleus, what would you need to do in relation to your home town to emit li
Scilla [17]

Answer:

Option B, Move closer to your home town

Explanation:

The options for the given question are as follows -

A) Knock down your previous house and build a bigger one.

B) Move closer to your home town.

C) Move further away from your home town.

D) Stay where you are but speed up your daily life

Solution -

Electrons carry negative charge while nucleus carries positive charge due to the presence of positively charged proton ions and neutral ions (which has no charge). All the electrons are attracted towards the nucleus due to its positive charge. The orbit on which an electron revolves around a nucleus has higher energy level as compared to the energy levels located in between the space of electron and nucleus.  

While moving from a high energy orbital to a low energy level orbital, an electron releases some energy.  Hence, in order to move closer to home, electron needs to push itself toward the nucleus by releasing energy

Hence, the given option is B

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3 years ago
Long-term use of certain antipsychotic drugs can produce involuntary movements of the facial muscles, tongue, and limbs. this me
goblinko [34]
The condition is known as tardive dyskinesia.
4 0
3 years ago
Which of the following made cells unique protobionts?
Lelu [443]

Answer;

b. Their ability to pass on genetic information.

Explanation;

-Protobionts are systems that are considered to have possibly been the precursors to prokaryotic cells. A protobiont is an aggregate of abiotically produced organic molecules surrounded by a membrane or a membrane-like structure.

-They exhibit some of the properties associated with life, including simple reproduction, metabolism and excitability, as well as the maintenance of an internal chemical environment different from that of their surroundings.

4 0
3 years ago
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Is all the options increase, which ones would serve to remove CO2 from the atmosphere?​
levacccp [35]

Answer:

A. Photosynthesis

Explanation:

Photosynthesis is a process in plants produce food materials by absorbing carbondioxide from the atmosphere which decreases the concentration of carbondioxide in the atmosphere. In photosynthesis reaction, plant take water from the soil and carbondioxide from the atmosphere in the presence of sunlight produces glucose and oxygen. Glucose is stored in different parts of plant such as grains, stem and roots while oxygen is released in the atmosphere.

8 0
3 years ago
All organisms must perform life-sustaining metabolic processes in order to survive.
Alik [6]

Explanation:

  • Unicellular organisms or single celled organisms that are made up only of one cell. Hence the name.
  • Unicellular organisms are further divided into Prokaryotic and Eukaryotic organisms
  • Examples of prokaryotic organisms are bacteria and Eukaryotic are protozoa and unicellular algae, however many eukaryotes are multi cellular as well.
  • These organisms have to carry out life sustaining metabolic processes for their survival.
  • These processes are metabolism, homeostasis and reproduction. Metabolism is important as it involves conversion of food into energy for cellular processes. Homeostasis for maintaining a constant internal physical and chemical conditions and reproduction is by cell division.
  • Multi cellular organisms as the name says unlike unicellular organisms consists of more than one cells.
  • Examples of multi cellular organisms are animals, land plants etc.,
  • Metabolic process in multi cellular organisms is a broad category of processes happening for these organisms which involves chemical reactions and pathways that happen at organismal state, transporting substances between the cells.
6 0
3 years ago
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