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Sphinxa [80]
3 years ago
9

Agents that can cross the placenta of a pregnant woman and cause birth defects are classified as

Biology
1 answer:
Ivanshal [37]3 years ago
5 0
They are known as Teratogens.

These substances are toxic and they harm the embryo. The harm may be psychological, physiological, or even both. They can come in all forms and even include simple things like alcohol which can cause the Fetal Alcohol spectrum disorder, or they can be complex things like radiation.
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Some people see wind energy as a clean alternative to fossil fuels. Others believe that utilizing this renewable energy resource
Y_Kistochka [10]

Answer:

Renewable energy resource as an obstacles for the growth of migratory salmon populations: It is now believed that the reduce access to spawning grounds and nursery areas, leading to a decrease in migratory fish populations is due to the dam structures of large storage-type schemes, which can create great obstacles for the movement of migratory fish species.

Explanation:

  • Storage-type schemes ( big dams) can significantly change the downstream flow regime,and may also alter water temperature and quality, and even make it inhabitable for fish to live.
  • As the storage of water can be linked with high evaporative losses, which in turn results in high life cycle water footprints compared to other sources of electricity.

<u>Run-of-river (ROR) schemes are HEP schemes: </u>

They operate without water storage, using the flow within a river channel.They are ecologically friendly and do not disturb the natural mechanism for the migrating salmons.

Working Principle:

They are normally used to regulate water levels, which allows a proportion or part of flow to be diverted down a secondary channel to a turbine before it is returned to the main channel further downstream.

There are some modern turbine types used in ROR HEP(hydroelectric power) schemes, which are also designed to allow fish to pass through the system unharmed if the fish do pass through the intake screens.

8 0
3 years ago
An energy pyramid shows the amount of_______<br> available at each feeding level in an ecosystem
Amanda [17]

Answer:

Energy

Explanation:

An energy pyramid shows the amount of energy available at each feeding level in an ecosystem.

5 0
3 years ago
3. If the solute concentration in the water is high (hypertonic solution), does water move
sdas [7]

Answer:

its flows out

Explanation:

i hope ill help

:)

7 0
3 years ago
Which of the following adaptations does not protect tundra organisms from heat loss?
Anvisha [2.4K]
D would be ur answer
3 0
3 years ago
The lac operon is an inducible system because the transcription of the operon occurs in the presence of an inducer (allolactose)
joja [24]

Answer:

A. True

Explanation:

Allolactose is an example of an inducer, a small molecule that triggers expression of a gene or operon. The lac operon is considered an inducible operon because it is usually turned off (repressed), but can be turned on in the presence of the inducer allolactose.

6 0
3 years ago
Read 2 more answers
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