Siphons in Mollusca are tube-like structures in which water (or, more rarely, air) flows. The water flow is used for one or more purposes such as locomotion, feeding, respiration, and reproduction.
The siphon propels the squid through the water in the opposite direction to which the siphon is pointing, much like jet propulsion. To use this jet propulsion, the squid takes in water through the large opening and then closes off the opening.

7 0

2 years ago

Electromagnetic waves are all around us T or F

Law Incorporation [45]

Answer:

2. True, 3 True, 4 Trues, 5 False, 6 True, 7 True, 8 False, 9 True, 10 True

Explanation:

3. True , Electromagnetic waves have electric and magnetic energy while ocean wave have kinetic energy which is then converted into electrical energy.

4. True, the distance between all the wavelength is same until and unless it not dampened or attenuated or amplified.

5. False, Frequency measures the number of times an event takes place in a given time period.

6. True, the higher is the frequency , the more will be the energy

7. True, Gamma waves have highest frequency

8. False, our eyes could see only visible spectrum wavelengths

9. True, some object or surfaces reflect the wavelength while some absorb it.

10. True, all cosmic researches are driven by EM waves theory and related logic.

7 0

3 years ago

In an eight–cell embryo of an organism, the cells of the upper tier are aligned directly over the cells of the lower tier. Which

Marina CMI [18]

starfish
 All normal eggs from the mother have an X chromosome while usually half the sperm cells from the father have a Y (male) chromosome and the other half have an X (female) chromosome and it is therefore the father's sperm that dictates which gender the embryo will take.

If the egg is fertilized by a sperm with a Y chromosome then the embryo will be a genetic male due to XY chromosome combination.
If the egg is fertilized by a sperm with an X chromosome then of course the embryo will be a genetic female due to XX chromosome combination.

3 0

3 years ago