What is the definition of permeability

Biology

1 answer:

ipn [44]3 years ago

6 0

Answer:

the state or quality of a material or membrane that causes it to allow liquids or gases to pass through it.

Explanation:

Hope this Helps:)

Plz Mark Brainliest

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Coral reefs only form in ocean waters between 30 N and 30 S. The reefs are confined to shallow water because?

Viktor [21]

Reef-building corals were confined to relatively shallow depths because many of these corals have microscopic algae called zooxanthellae living inside their soft tissues.
These algae are often important for the corals’ nutrition and growth, but require sunlight for photosynthesis. There is no sunlight deep in the water.

8 0

3 years ago

In discriminating between a viable and non-viable early intrauterine pregnancy, which one of the following criteria can be used

Alecsey [184]

Answer:

The correct answer in discriminating between a viable and non-viable early intrauterine pregnancy is B: "Mean gestational sac diameter of > 25 mm and no embryo".

Explanation:

There are different criteria used to discriminate between a viable and a non-viable early intrauterine pregnancy. The most often used to diagnose pregnancy failure are:

- Crown-rump length criterion: This is the absence of cardiac activity by the time the embryo has reached crown-rump length. A crown-rump length of 7 mm or more with no cardiac activity has been suggested by the latest studies to diagnose a non-viable pregnancy. There is a substantial likelihood that a crown-rump length < 7 mm can result in a false-positive diagnosis of pregnancy failure.

- Mean sac diameter criterion: This is the absence of embryo by the time the gestational sac has grown to a certain size. The gestational sac increases as the pregnancy progress. It has been suggested by the latest studies to use a mean sac diameter of 25 mm or more, and no visible embryo to diagnose failed pregnancy. A mean sac diameter of 16 to 24 mm and no embryo is suspicious for failed pregnancy, but shouldn’t be used to diagnose it.

- Time-based criteria: This is the absence of an embryo by a certain point in time. If an initial sonogram shows that there is a gestational sac and a yolk sac, but about 11 days later there isn’t any embryo with cardiac activity, then a failed pregnancy can be established. The timing event in early pregnancy is precise and reproducible to perform a correct diagnosis.

There are also suspicious findings that may help to identify a non-viable pregnancy. These are not certain and have not been extensively studied yet, so they cannot be used to reliably diagnose a pregnancy failure. A few of these findings are an empty amnion, a small gestational sac size, and the yolk sac size.

- Yolk sac: An enlarged yolk sac sized over 7 mm is suspicious for a failed pregnancy.

4 0

3 years ago

the process represented in the diagram produces a molecule that is complementary to the template strand of dna. what type of mol

DerKrebs [107]

This type of molecule that is produced assuming that this process is transcription, and not DNA replication would be mRNA.

5 0

4 years ago

Two models of the same compound are shown.

guajiro [1.7K]

Answer: pretty sure it’s C

Explanation: model a (3D model) it shows how the atoms connect. Model b doesn’t. Hope this helped