Black squirrels have a survival advantage over gray squirrels
The answer is bladder control usually is achieved before bowel control.
Bowel control usually is achieved before bladder control. The child should not be forced to sit for long periods . The ability to remove clothing is one of the physical signs of readiness for toilet training. The physical ability to control the urethral sphincters is achieved some time after the child is walking, probably between the ages of 18 and 24 months.
Shelled protozoans became part of 7 layers
The phylogenetic tree is commonly used by biologists to study evolutionary relationships between organisms and their ancestors. To add up, it is a diagram that branches the "phylogeny" of a single organism which could be very significant and determining on how genetically different or similar they are to their ancestors.
Answer: They are sterile
Explanation:
Mule is a hybrid of male donkey and female horse with different chromosome number and is considered superior to both horse and donkey. Still it is considered as a weak hybrid this is because the mule is sterile which means that it cannot reproduce further.
The mule though is superior in many ways such as it can jump and is strong. The hybrid of mule is not good as it cannot continue its next generations on earth.
They are sterile and so is a weak hybrid.
