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A fetal heart sonogram demonstrates a small left ventricle, aortic valve stenosis, and absent mitral valve; these ultrasound findings suggest?

All of the following are sonographic signs of Ebstein anomaly, EXCEPT?  

Divers who first saw the green alga Caulerpa growing near the out-flow pipe from the Monaco aquarium should have collected and destroyed every scrap of it because its inedibleness and ability to propagate asexually were good predictors that it could become an aggressive invasive species.

Removal by humans of large predators from coral reef ecosystems has resulted in

Lack of shelter, due to lack of physical structure, in the epipelagic can be solved by:

One disadvantage of manufactured pesticides that are used to prevent insect damage to crop plants is that they often end up harming  freshwater and marine animals when they wash off the land

When algal species that had been used in successful mariculture programs in some parts of the south Pacific were transported to Hawaii (where they do not grow naturally) to build a mariculture program there, they began to grow unchecked on the coral reefs, smothering the corals.

For each of the following marine organisms, please write the letter corresponding to the listed characteristic (A through D below) that contributes most to their vulnerability to extinction.   sardines

For each of the following marine organisms, please write the letter corresponding to the listed characteristic (A through D below) that contributes most to their vulnerability to extinction.   sea otters

Mariculture is most successful (i.e., sustainable and not damaging) if the coastal mangroves are completely cleared away so that they don’t interfere with building roads for the trucks that carry the seafoods to markets