Hair is a fiber that is found only in mammals, and hair is largely made of keratin, a protein that contains a lot of the amino acid cystine . Given these facts, what do mammals contain among the following options: - food - ghosts - keratin - Animal fur - magic - soul - alveoli - four limbs
keratin

(Question)
Nuclear reactions in stars causes stars to produce light, and light is made of photons . Given these facts, nuclear reactions in stars causes stars to produce among the following options: - an object - power - our star - heat - warmth - photons - energy - nucleus
(Answer)
photons

Ques: Nerves can be used to feel heat and pressure on the skin, and sensory neurons run anteriorly from the nerve ring to the sensory organs in the head. Given these facts, what can be used to feel heat and pressure on the skin among the following options: - stem cells - joules - hormones - electricity - chemical messengers - Electrical energy - oxygen - sensory neurons
Ans: sensory neurons

(Q).
Condensation is when change from a gas into a liquid by reducing heat energy, and light energy is converted into heat energy. Given these facts, decreasing the amount of light results in lower temperatures allowing a potential increase of what among the following options: - salinity - Condensation - electricity - Temperature - Evaporation - Quality of life - aerobic capacity - Dehydration
(A).
Condensation

Ques:Behaviors that improve fitness increase through natural selection, and natural selection is the mechanism of evolution. Given these facts, what process increases behaviors that improve fitness among the following options: - competition - sweating - humanization - evolution - movement - photosynthesis - sleep - cats

Ans:evolution

Plants use cellulose for their cell walls, and basically, fiber is cellulose . Given these facts, plants use what for their cell walls among the following options: - sugar - cations - sulfur - fiber - glucose - Carbon - Cane. - peat
fiber