30.(9 points) The mammals (animal A) raised at room temperature (25℃) with body temperature of 37℃ were randomly divided into two groups. One group was placed in the environment of 465438 0℃ for 65438 0 h (experimental group), while the other group was still placed in the room temperature environment (control group), and the related behaviors of the two groups were continuously observed and recorded. If: at the beginning of the experiment,
In the (1) experiment, the capillaries of the animal skin in the experimental group will _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
(2) When the animals in the experimental group have anxious behaviors, the hormones secreted by their adrenal medulla will _ _ _ _ _ _ _ _ _.
(3) The purpose of setting up the control group in this experiment is _ _ _ _ _.
(4) If the animal A raised at room temperature is placed in an environment of 0℃, the animal will tremble with cold, and its oxygen consumption will be _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.
The answer to this question is
(1) Shrinkage rate decreases.
(2) Increase
(3) Compared with the experimental group
(4) Increase and accelerate.
3 1.(9 points)
Trees in forest farms are often invaded by some kind of mountain rat. In general, it is difficult to control rodent damage for a long time in a forest farm with serious rodent damage only in a local area (nursery) of the forest farm. Answer the following questions:
(1) Under the ideal condition of unlimited resources, the growth curve of mountain rat population is _ _ _ _ _ _ _.
(2) If there is a population decline after the drug is used to kill rats in the nursery, the factor that should be considered is _ _ _ _ _ _ in addition to the increase in mortality caused by drugs.
(3) Theoretically, besides drugs, biological control methods can also be used to control rodents, such as introducing them into heaven and earth. The relationship between natural enemies and mountain rat is _ _ _ _ _ _ _.
(4) Generally speaking, a population has characteristics that individuals do not have, such as population density and age structure. Then the age structure of the population refers to _ _ _ _ _ _.
The answer to this question is
( 1)j
(2) Intraspecific struggle
(3) Predation
(4) the proportion of individuals in each age group in the population.
The above are some of the questions and answers in the two-volume science comprehensive examination paper of the national college entrance examination for reference only.