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Ksivusya [100]
3 years ago
9

Jon is researching the oxygenation of Earth’s atmosphere. Which unicellular organism do biologists consider to be the main contr

ibutor to that process?
A. paramecia
B. amoebae
C. dinoflagellate
D. cyanobacteria

Answer is D. cyanobacteria
Biology
1 answer:
andriy [413]3 years ago
7 0
Answer is D.... Cyanobacteria
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Whether a drug is classified as a stimulant or a depressant depends upon its effect on _____________________.
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Its effects on the brain
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How is mass transit in cities a possible solution tk urban air pollution?
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Mass transit can help reduce air pollution in urban cities because there are fewer cars on the roads, creating less pollution.
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1) Which of the following is NOT a property of life? a) Growth b) Reproduction c) Homeostasis d) Having a heartbeat .
scoray [572]

Answer:

c

Explanation:

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A. Secretes hormones
Vadim26 [7]

Answer:

A. 3

B. 4

C. 5

D. 6

E. 2

F. 1

Explanation:

1. Integumentary system.

This is an organ system that consists of hair, skin, nails and exocrine glands with receptors that senses the outer stimulus and environmental conditions, through homeostasis maintain stability of the internal environment.

2. Nervous system.

It receives sensory information and signals, convert them to nerve impulses that are transmitted to the body and brain via the spinal cord using nuerons and axons. It also intergrates, retains and analyses information in the brain.

3.Endocrine system.

Secretes hormones and chemicals in response to stimulus from the nervous system to maintain balance using feedback loops i.e, negative and positive.

4. Lymphatic system.

Part of the immune system that consist of vessels that carries lymph, cleaning the blood by filtering lymph with foreign particles into the lymph node.

5. Urinary system.

Used to eliminate waste from the body, regulates blood pressure, volume and pH. It also used to retain electrolytes and metabolites.

6. Respiratory system.

Used for gaseous exchange using the blood, heart and lungs. Air enters the lungs, transported by blood and is pumped by the heart to all body parts where oxygen is dropped, carbon dioxide is collected by the veins to the lungs and released to the atmosphere.

8 0
3 years ago
NEED HELP ASAP WILL GIVE BRAINLIEST THANK YOU
lesantik [10]

The answer should be 3

Explanation:

One plant will for sure have red leaves, while the other two have a probability of having red and yellow leaves, and one plant will only have yellow leaves.

Yellow: Y

Red: y

Two plants: Yy

Although the Red is recessive so it's a smaller chance of it overpowering the yellow, the answer might also be 1.

5 0
3 years ago
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