Based on extensive research, which formula is now recommended for determining maximal heart rate?

a. 220 - age

b. 208 - (.7 x age)

c. 208 - age

d. 220 - (.7 x age)

Ecological blank are a collection of plants, animals, and microorganisms residing in a habitat

How do koalas benefit from trees

What is the linking number in vivo for a plasmid that is 4200 bp in size, if there is normally 1 negative supercoil in every 20 base pairs of a circular DNA? Assume there are 10.5 bp per turn of the double helix.

In what part of the day do plants produce more carbon dioxide than oxygen

How is the sugar produced by photosynthesis transported from the leaf? A. in the xylem B. in the phloem C. through the stomata D. through the epidermis

What is the sudden appearance of a large array of animal life known as?

The name of hermone that calcium concentration in blood, called?

A farmer cut a branch from his favorite, mature fruit tree, planted it in the soil, and it grew to be a new tree. The farmer's method of growing a new plant is a type of

How Does crossing-over leads to greater variability of phenotypes?

what natural hazard is often caused by human activities and is triggered during and after periods of drought