4s) Cephalization is primarily a 53) There are l) method of C) ada adaptations.

Question

4s) Cephalization is primarily a 53) There are l) method of C) ada adaptations. Animals that are ectothermic are likely to be ptation to dark fate of the bla E) a type of d Cenwtronmensi with a constant food 49) Which functi ion associated with muscle B) very hot environments activity emperatures D) very cold environments most directly affected by A) the resting membrane potential B) muscle fatigue C) muscle contraction D) the initiation of an action potential E) ATP hydrolysis 54) An example of antagonistic hormones ( controlling homeostasis is calcium balance metabolism A) thyroxine and parathyrold hormone in B) insulin and glucagon in glucose ? progestins and estrogens in sexual 50) Most food chains can contain only a few differentiation trophic levels becuase D) epinephrine and norepinephrine in A) local extinction of a species causes fight-or-flight responses extincion of the other species in its on each plant species but more abundant than prey species lost as it passes to the next higher level food chain 55) During the process of digestion, fats are B) only a single species of herbivore feeds C) predator species tend to be less diverse D) most of the energy in a trophic level is broken down when latty acids are detached from glycerol. In addition, proteins are digested to yield amino acids. What do these two processes have in common? Both A) involve the addition of a water molecule to break bonds (hydrolysis) B) occur intracellularly in most organisms. C) require the presence of hydrochlorie 51) Which of these is not considered an amniote? acid to lower the pH. A) amphibians B) egg-laying mammals C) birds D) nonbird reptiles E) placental mammals D) require ATP as an energy source. E) are catalyzed by the same enzyme 56) A reproductive hormone that is secreted directly from the anterior pituitary gland is A) estradiol 52) Most of the exchange surfaces of multicellular animals are lined with follicle-stimulating hormone (FSH) A) neural tissue B) epithelial tissue C) smooth muscle cells D) connective tissue D) gonadotropin-releasing hormone GnRH)

Explanation / Answer

Ans

49 ) C

Muscle contraction is directly affected by calcium levels.

53 ) D

Ectoderms can't servive in very cold environments .

54) B

Insulin and glucagon are antagonistic hormones that maintain homeostasis .

56) B

FSH is direcetly from anterior pituitary gland.

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