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maria [59]
3 years ago
15

The arms of humans and the flippers of dolphins have a similar bone structure. So, they’re _______ organs. The legs of a kangaro

o and the legs of a jumping spider allow both organisms to jump. However, spiders are invertebrates, and kangaroos are vertebrates. This difference makes their legs ______ structures.
1)A. analogous B. homologous C. vestigial
2)A. analogous B. homologous C. vestigial
Biology
2 answers:
wariber [46]3 years ago
6 0

i believe the correct answers are:

1) B. homologous

2) A. analogous

mamaluj [8]3 years ago
6 0

Answer:

1)  B. homologous

2) A. analogous

Explanation:

The arms of humans and the flippers of dolphins are homologous organs as both are made of the same pentadactyle pattern of bone structure, but their function is different. Arms of humans perform the function of holding things and the flippers of dolphins are used for swimming. The legs of a kangaroo and the legs of a jumping spider are analogous organs because both organs are dissimilar in origin but perform the same function. They use for jumping.

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Read 2 more answers
** ALL MY POINTS**
Flura [38]

PART 1


1. The answer is low frequency electromagnetic waves are able to go around obstacles due to their larger wavelengths. This characteristic of lower frequency waves is due to their ability to diffract around obstacles such as buildings and hills. Therefore, they transmit over long distances unlike high frequency electromagnetic waves.

2. One disadvantage is interference. Electromagnetic waves of the same frequency transmitted at the same time will interfere with one other and therefore the signal will be lost or scrambled. Other electromagnetic waves such as microwaves are affected (interfered with) by weather elements.

3. Analogue signals are continuous signals with wave-like properties while digital signals are discrete signals or pulse (ons (1s) and offs (0s) that represent bits). Analogue signal is represented by a sine-wave while digital signal is represented by discrete squares waves.

4. Digital signals are less immune to eavesdropping unlike analogue signals. Analogue signal is also more prone to distortion unlike digital signal. Digital signals transmit more data than analogue signals. Digital signal draw less energy to transmit compared to analogue signal.

5. Broadcasting of TV is nowadays using digital signals due to the high number of available channels. Computers and the interne utilize digital signaling to transmit data. Controls systems such as radar system also use aspects of analogue waves. Sensors also utilize analogue waves especially transducers such as seismology equipment.


PART 2


1. One way is by sending radio waves to probes sent out in space to give them commands during exploration. Radio telescopes also pick up naturally-occurring radio waves from space and analyze the data to make conclusions about space and the astronomical objects.

2. Radio waves are used in communication by transmitting data over long distances. One example is its use TV transmission. Another is through military defense of airspace. The radio waves are used to detect enemy intrusion into restricted airspaces using radar.

3. It is common that signal from the environment will be in analogue signal format. The conversion to digital signals allows for the digital equipment in the telescope to interpret and analyze the data. Telescopes prefer digital equipment because they consume less power, handle more data, and are less prone to intrusion, and distortion, hence more secure to analogue equipment.



3 0
3 years ago
Read 2 more answers
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