b. All adults should engage in moderate-intensity aerobic physical activity for at least 150 minutes per week, vigorous-intensity aerobic activity for 75 minutes per week, or an equivalent combination of the two.
Explanation:
The Physical Activity Guidelines for Americans guidelines for older adults states that:
Older adults are more susceptible to cardiac and nervous disorders along with poor musculoskeletal strength.
To maintain good cardiac and nervous health; musculoskeletal fitness and strength; reduce depression, cognitive decline; older adults are directed to engage in moderate-intensity/vigorous or combination of both aerobic physical activities and muscle-strengthening exercises.
They should include physical activities combining one or more of; occupational (work-based) activities; transportation (walking, cycling); household chores (cleaning); leisure time activities (gardening, dancing); sports activities (hiking, biking, swimming, games, running) and planned daily routine exercise activities; all of them as part of their daily routines performed as an individual, family or community-based activities
.
Older adults with mobility issues should perform exercises to improve their balance and prevent falls
.
Answer: A
Explanation:
A is correct, since developed countries don't have as high birth rates, which decrease growth rate (it's actually pretty interesting when you look at the data and compare developed and non-developed countries in terms of birth rates.
B is wrong, since that would increase growth rates.
C is wrong, since (though that's true due to better medicine) that would increase growth rates.
Answer: both animal and plant cells are very alike because they both are eukaryotic cells. They both have membrane-bound organelles like nucleus, mitochondria, endoplasmic reticulum, golgi apparatus, lysosomes, and peroxisomes.
One difference is that plant cells have a cell wall while animal cells does not
Explanation:
The molecules doesn't need energy to cross through.
The diffusion doesn't need protien, the molecules pass between phospholipids by passes protien. It moves smaller molecules. Facilitated need protien also hormone, and larger molecules.
I wish it makes sense.
Answer:
The scientist is determining the relative age of the rock and the method is known as relative dating of rocks.
Explanation:
The relative dating method is based on the fact that more older the rock layers, the more it would be deeper. The overlying layer of rock will be located in less deeper location, henceforth it would be less older rock layer. This method is mainly used by the scientists, for determining the age of the rocks or fossils embedded in it, before any absolute dating method like radioisotope dating of rocks is discovered.
