Suppose that a small mainland tortoise and a large island tortoise are placed in the same pen at a zoo. which tortoise will experience greater variation in body temperature over a 24 hr period, the small or large tortoise?

Both small mainland tortoise and large island tortoise placed in same pen at zoo will not experience any greater variation in body temperature over a 24 hr period.  

Explanation:

It is because they are ambient in nature which means that their body temperature remains unchanged with responds to the environment. At 13℃ the tortoise are inactive and during this temperature any variation is not seen in the body temperature of the tortoise and it is same for both big as well as small tortoise.

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.

hypoxemia refers to a below usual concentration of oxygen in the blood, mainly in the arteries. hypoxemia is an indication of an issue associated with circulation or breathing and may lead to various symptoms like shortness of breath.  

the condition is identified by determining the level of oxygen in the blood sample obtained from an artery. it can also be predicted by determining the oxygen saturation of the blood with the application of a pulse oximeter.  

the normal arterial oxygen is about 75 to 100 mm hg. the values underneath 60 mm hg is generally considered with the requirement for supplemental oxygen. the normal pulse oximeter readings generally range between 95 to 100 percent. the values under 90 percent are regarded as low.  

in the given case, the oxygen saturation is measured at 93 percent, hence, there is no need to administer oxygen, that is, one should withhold oxygen.