Echinoderms lack respiratory and excretory systems, and starfish and sea urchins are also echinoderms. Given these facts, what kind of animal doesn't have a respiratory or excretory system among the following options: - a fish - bears - ant - whale - humans - starfish - mammals - llama
starfish

(Question)
An animal requires warmth for survival, and all dogs are animals . Given these facts, what requires warmth for survival among the following options: - ice cubes - Man - Whales - hydrogen - dogs - Birds - glaciers - humans
(Answer)
dogs

Ques: Igneous rocks are formed from magma cooling, and igneous rocks are formed by the solidification of magma. Given these facts, where do igneous rocks come from among the following options: - plates - earth - crust - calcite - magma - germany - oceans - heat
Ans: magma

(Q).
Arefrigerator is used for keeping food fresh for a long period of time, and to prevent bacterial food poisoning, the basic rule is to keep hot foods hot and cold foods cold. Given these facts, what prevents cold food from growing poisonous bacteria among the following options: - Dehydration - Cooking - a hydraulic system - sweating - refrigerators - fur and fat - an electric stove - hard outer covering
(A).
refrigerators

Ques:Hormones are chemical messengers that control many body functions, and growth hormone is in many ways an anti-aging hormone. Given these facts, what controls anti-aging among the following options: - A computer - air - chemical messengers - ice - an electric stove - Electrical energy - water - Chemical energy

Ans:chemical messengers

Ques:Harming an animal species has a negative impact on the population size of that species, and sometimes hunting can impact animal populations. Given these facts, what does hunting do to a species among the following options: - Plant growth is reduced - Decreases population - protect them - cause their death - Creates demand for the species - Strengthens the species - massive damage - Increases population

Ans:
Decreases population