How does Natural Selection lead to evolution?

Which is the correct definition of tissues?

LuckyWell [14K]

B.
Groups of similar cells that do a particular job.

8 0

3 years ago

The result of all sin is: repentance, death, or self-determination.

svetlana [45]

It can honestly be all of the above ..

3 0

4 years ago

The most apparent difference between modern humans and Australopithecus africanus is that Australopithecus africanus

lara [203]

Answer:

The correct answer is option d.

Explanation:

An extinct species of australopithecine, that is, Australopithecus africanus was the first species to be illustrated. It was of gracile or slender build and was considered to have been the direct ancestor of modern humans. Like modern man, the A. africanus did stood upright and walked upright, and were having free hands to use. However, they were smaller in height and lighter in weight in comparison to modern man.

3 0

3 years ago

The epithelium of the esophagus is composed of which type of epithelial tissue?

lesya692 [45]

Answer:

Stratified squamous epithelium

Explanation:

Most animals, including humans, have stratified squamous epithelium in their esophagus. It may include keratin, which gives an extra layer of protection, allowing them to eat bigger and less chewed food. It should be noted that the esophagus has a mucous membrane and because of the muscular layers, called muscularis mucosae, the food can pass rapidly through it preventing damages in its layers due to coarser or abrasive food.

5 0

4 years ago

Wave is a periodic (1) __________ that moves away from a source which carries (2) __________ with it. Waves can be typified acco

swat32

The correct answers to fill into the blank spaces are;

Wave is a periodic disturbance that moves away from a source which carries energy with it. Waves can be typified according to the direction of motion of the vibrating particles with respect to the direction in which the waves travel and according to medium .

Longitudinal waves vibrate perpendicularly to the direction in which the waves travel. This wave exhibits up and down motion. Longitudinal waves vibrate perpendicular or back and forth to the direction in which the waves travel.

Electromagnetic waves are combination of transverse and longitudinal waves. These move in a circular pattern as the waves pass by.

Mechanical waves need solid, liquid and gas medium to propagate or travel. Transverse, mechanical and surface waves are examples of mechanical waves.

Electromagnetic waves do not need medium to propagate. Radio waves, ultraviolet, infrared, and gamma rays are examples of electromagnetic waves. The nature of waves can be described through its terms, quantities and propagation.

The crust and trough refer to the highest point and lowest point of a wave pattern, respectively. The magnitude of a transverse wave is the maximum displacement of a particle of the medium on either side of its normal position when the wave passes. The frequency of periodic waves is the number of waves that pass a particular point for every one second while the Amplitude is the distance between adjacent crests or troughs.

The period is the time required for one complete wave to pass a particular point. The speed of the wave refers to the distance the wave travels per unit time. It is related to the frequency of the wave and wavelength through the following equation: wave speed= frequency x wavelength.