B THEY RELEASED CARBON DIOXIDE, WHICH EVOLVING ANIMALS NEEDED.
<h2>its true</h2><h2>the ecological system of organization is a gigantic scale of all sorts of sh*tt</h2>
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.
Answer:
A cell is the smallest unit of a living thing.
<h2>DNA Mutations</h2>
Explanation:
<em> (A) A base-pair deletion</em>
- <em>Insertion or deletion brings about a frame shift that changes the perusing of consequent codons</em> and, hence, adjusts the whole amino acid arrangement that follows the transformation, additions and cancellations are normally more harmful than a substitution in which just <em>a solitary amino corrosive is modified </em>
- DNA changes brought about by mutagens may hurt cells and cause certain illnesses,<em> for example, malignancy</em>
- <em>Instances of mutagens incorporate radioactive substances, x-beams, bright radiation, and certain synthetic compounds</em>
