Under certain environmental conditions, the microscopic alga Karenia brevis grows quickly, creating blooms that can make the ocean appear red or brown. K. brevis produces powerful toxins called brevetoxins, which
have killed millions of fish. In addition to killing fish, brevetoxins can become concentrated in the tissues of
from paralytic shellfish poisoning, a food poisoning that can cause severe gastrointestinal and neurological
symptoms, such as tingling in the fingers or toes. Use your results to explain why these so-called “red tides"
occur in coastal water

then that particular organisms become extinct.

tsd is temerature dependent sex determination.

tsd: it is a type of environmental sex determination in which the temperature experienced during embryonic/ larval development (ambient temperature for development) determine the sex of the offspring.

crocodile displays the tsd where the ambient temperature of the developing egg determines the individual's sex. for example in the american alligator's eggs, incubation at 33 ºc produces mostly males, while incubation at 30 ºc produces mostly females. so if the american alligator's egg will get the ambient temperature (33 degree celcius)during embryonic development from egg, the offspring will be male and same for the female sex determination.

answer: angiosperms

dicots

angiosperms are highly evolved plants, they produce seeds which are enclosed within in a carple. these are the largest group of plants on earth. they include trees, shrubs, herbs and small flowering plants. angiosperms exhibit a flowering stage in their life cycle. the flower serves the function of reproduction and fruit formation in majority of angiosperms. dicot is the term used to describe flowering plants that have two seed leaves. dicots are plants which develop seeds which split into two parts called cotyledons. each cotyledon contains one embryo.

here, a small purple flower development indicates that the plant belongs to angiosperms and having two embryonic leaves indicates it belongs to dicots.  

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