Nucleus, membrane-bound organelles, and rod-shaped chromosomes.
Answer:
Biological evolution refers to the cumulative changes that occur in a population over time. These changes are produced at the genetic level as organisms' genes mutate and/or recombine in different ways during reproduction and are passed on to future generations.
Explanation:
Yes but no? The genetic variation on which natural selection acts may occur randomly, but natural selection itself is not random at all. ... The survival and reproductive success of an individual is directly related to the ways its inherited traits function in the context of its local environment.
Tissue is a group of cells that have similar structure and that function together as a unit. ... There are four main tissue types in the body: epithelial, connective, muscle, and nervous. Each is designed for specific functions
The urinary system is made up of the kidneys, bladder and ureters (tubes that connect the kidneys to the bladder). The kidneys act as filters removing extra fluid and waste from your blood to make urine. Urine passes from the kidneys into the ureters, which drain into the bladder. When the bladder is full, urine flows out of the body through a tube called the urethra.
The ureters normally enter the bladder at a diagonal angle and have a special one-way valve system that prevents urine from flowing back up the ureters in the direction of the kidneys. If this system doesn’t work, urine can flow back towards the kidneys. This is called vesicoureteric reflux (also known as urinary reflux).
Sometimes vesicoureteric reflux (VUR) can be associated with other 'plumbing' problems in the urinary tract and with small, damaged or malformed kidneys.
So I believe the answer is 1.
