science rege part1
A female giraffe has 62 chromosomes in each of her skin cells.How many chromosomes will be in the skin cells of her offspring?
62
A decrease in the biodiversity of an ecosystem usually leads to
a decrease in stability
Down syndrome occurs when an individual has an extra copy of chromosome 21. This additional genetic material alters development and results in Down syndrome. This genetic abnormality is an example of
a mutation
Many female mammals, such as dogs, give birth to litters consisting of multiple offspring. All of the characteristics described below are reproductive adaptations that female dogs have for giving birth and caring for several offspring at once, except
a pancreas that produces excess insulin to trigger the release of the eggs
One of the largest and oldest organisms on Earth is located in Fishlake National Forest in Utah. Pando is an 80,000-year-old grove of aspen trees that covers 100 acres. Although it looks like a forest, DNA analysis of several of the âtreesâ has confirmed it is really just one huge organism. Therefore, the âtreesâ must have been reproduced
asexually and are genetically identified
The respiratory system of an elephant functions in a similar way to which organelle in a single- celled organism?
cell membrane
When compared to organisms that utilize process A, organisms that utilize process B would most likely produce offspring with
fewer genetic differences
Most of the reactions by which energy from carbohydrates is released for use by the cell take place within the
mitochondria
Which human activity best represents a method for recycling nutrients?
mixing lawn clippings with vegetable waste to produce compost used to fertilize gardens
The beetles defense mechanism has developed as a result of
natural selection over many generations
Which two systems work together to alert the young birds of danger and help produce the vomit?
nervous and digestive system
Rabbit populations vary in size over time. An increase in which factor would likely prevent the rabbit population from steadily increasing?
predators
The carrying capacity of an environment may be decreased by
removing dead animals
Rejection of a newly transplanted organ is caused by
the immune system reacting to the presence of the organ
A weightlifter has spent years building his muscular strength. His newborn daughter has normal strength for a baby. Which statement best explains this situation?
the weightlifter developed muscles from exercising. This characteristic will not be inherited.
