I believe the answer is B
Answer:
Option D = 3.4 g/mL
Explanation:
Given data:
Volume of water = 21.2 mL
Volume of water + object = 27.8 mL
Mass of object = 22.4 g
Density of object = ?
Solution:
First of all we will calculate the volume of object.
Volume of object = Volume of water+ object - volume of water
Volume of object = 27.8 mL - 21.2 mL
Volume of object = 6.6 mL
Density of object:
d = m/v
d = 22.4 g/ 6.6 mL
d = 3.4 g/mL
Answer:
3. detection and response to stimuli
Explanation:
According to the given information, the thermoreceptors present in the skin layers of dogs and cats sense the change in the temperature of surroundings. When the temperature is reduced during a cold day, the sensory information about the same is sent to the central nervous system which in turn sends the motor information to the related muscles and glands.
One such response towards the lower temperature conditions is an expansion of their skin coat layers to insulate the underlying tissues from the cold surroundings. The same response (expansion of skin coat) is produced when these animals sense the danger of the presence of large predators around them.
Answer:
Presence of papillary muscles
Explanation:
- Papillary muscles are structural components of the ventricles.
- They are attached to the cusps of the mitral and tricuspid valves through connective tissue strings known as the cordinae tendeneae (heart strings).
- These muscles prevent the prolaspse of these valves during ventricular systole.
- Although they differ in number i.e. two in left and three in right ventricle, papillary muscles are present in both ventricles.
