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____ [38]
3 years ago
6

If you find a fossil in two different locations and it has featured in common with dinosaurs and modern birds, how does this sup

port the evolutionary theory?
a) the two species must not be related
b) looking at the fossils, they show similarities both physically and in their DNA that don't appear to change much over time
c) dinosaurs must have evolved from mammals because their bones are similar in size rather than birds
d) the land must have been together at one point where these two species interbred to share a common ancestor
Biology
1 answer:
Naddik [55]3 years ago
7 0
Answer: D

Explanation: the continents wee once connected. It was known as Pangea
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After 20 years how much plant biomass does a restored wetland contain
Amanda [17]
After 20 years a resorted wetland can contain approx. 80% of plant biomass of a natural wetland.

Wetlands are one of the most endangered ecosystems in the world according to the UN and restoration is the only way to save these habitats.

The fact that restored wetlands can contain up to 80% of plant biomass shows how successful restoration programs can be.
8 0
3 years ago
How would an x-ray technician position the camera to produce a frontal view of a patient's abdominal cavity?
leva [86]

Answer: Option A. "In front of the patient, pointing at his navel"

Explanation:

The X-ray of abdominal cavity is known as Abdominal x-ray. It has same principle as X-ray and uses ionizing radiation to take pictures of inner parts of abdominal cavity such as intestine, stomach, liver and spleen. it is used to diagnose patients with vomiting, unexplained pain, and nausea.

While diagnosing  patient's abdominal cavity, x-ray technician position the camera in front of the patient, pointing at his navel in order to produce a frontal view of abdominal cavity.

Talking about a x-ray machine, it is a compact apparatus which can be taken to the patient in a hospital bed or the emergency room. The x-ray tube connects flexible arm which further extends towards the patient and an x-ray film holder (image recording) plate is placed under the patient.

The technologist will ask the patient to take position on the x-ray table or bed and will position x-ray machine over the abdominal area of the patient, in order to take the frontal view of abdominal cavity. The patient will be asked to hold their breathe to get a clear picture. The technician will turn on the x-ray machine that allows  x-ray machine  to produce a small burst of radiation which passes through the abdominal area and records the frontal view of  patient's abdominal cavity. As a result, soft tissue shows up in shades of gray and air appears black while bones appear white on the x-ray, through which patient can be diagnosed.

Hence, the correct option is A "In front of the patient, pointing at his navel".

8 0
3 years ago
Help me ALL of these, and you get brainiest! (:
Evgen [1.6K]

Answer:

1. Circulatory System

2. Respiratory System

3. Endocrine System

4. Nervous System

5. Urinary/ Excretory System

Explanation:

1. Circulatory System- The heart pumps blood and blood vessels such as arteries and veins, transports the blood to every part of our body providing organs and muscles with nourishment.

2. Respiratory System- This system maintains our breathing. It supplies the body with oxygen for cellular respiration.

3. Endocrine System- The glands of the endocrine system secrete chemicals called hormones that regulate most of the processes in our bodies like growth, reproduction, metabolism, etc...

4. Nervous System- The entire nervous system controls all of the other systems of the body and it also transmits information to the brain, such as pain and external sensations.

5. Urinary/Excretory System- This system is responsible for eliminating waste products of metabolism and other materials from the body that are of no use.

5 0
2 years ago
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Humanity faces a great number of environmental challenges, including: resource depletion, ecosystem service deterioration, pollu
mamaluj [8]

Answer:

Option B and E and D

Explanation:

Technological advancement has led to growth of industries and manufacturing units and hence the net production of goods. This has led to the use of natural resources and release of pollution of all forms. Environmental research leads to intrusion into niche habitats and hence causes its destruction.

Option B, D and E are correct

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Hypotonic - the inside of the cell
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