B. Lampreys
C. Birds
D. Frogs and toads
Would it be A.?
it would be the lampreys because they do have a backbone
Nondisjunction is the failure of a pair of chromosomes to separate (to disjoin) during cell division (meiosis). When this happens ( in anaphase I of meiosis) two out of the four new daughter cells produced from a parent cell will have an extra copy of one chromosome and the other two daughter cells will end up missing that chromosome.
Most of the time when fertilization involves gametes with an abnormal number of chromosomes, the resulting cell does not survive to produce a new individual. However there are some cases where the individuals survive and such, when they are born end up having a syndrome caused by too many or too few chromosomes. An example is Turners syndrome caused by too few chromosomes (monosomy x) , and Down syndrome caused by too many chromosomes (trisomy 21).
Answer:
Nondisjunction is the failure of a pair of chromosomes to separate during meiosis.
Explanation:
B) Balanced forces must be acting upon the cart.
C) An unbalanced force applied to the cart pushing or pulling it forward.
D) The unbalanced force acting upon it must be smaller than that of friction.
An unbalanced force applied to the cart pushing or pulling it forward, must occur to a shopping cart at rest in order to make it roll forward, hence option C is correct.
The downward-moving gravitational force will be at work. A force called the normal force will react to the gravitational force in accordance with Newton's third law. And formal force will exert upward pressure.
The magnitude of these two forces is the same. Due to their mutual cancellation, the net force acting on the cart in the vertical direction will be zero.
They may result from factors like magnetism, gravity, or anything else that could speed up a mass. A force in physics is any effect that, if left unchecked, will alter an object's motion.
Therefore, option C is correct.
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Genetic variation determines inherited differences between individuals . Our height or eye color are inherited from our parents, but our phenotype is also affected by environment such as the food we eat (diet), drugs we take, toxins surrounding us, climate, location, culture, physical accidents and lifestyle.
A person may inherit a gene to be tall, but poor diet during childhood may cause stunted growth.
A Plant may have the potential for strong growth, but if the soil does not have sufficient minerals, the plant may hardly grow at all.