2. A Cepheid variable star has an apparent brightness of 85 and a period of 14.3 days. (This means the star is 85 times brighter than the Sun would app distance of 1 Mpc.) About how far away is the star?
8000
Mean luminosity (Suns
Distance (Mc
6000
4000
2000
2
Period (days!
Luminosity ratio
20
10
15
20
40
80
O A 43 Mpc
OB.7.7 Mc
O C. 10.8 Mpg
OD. 15.9 Mpg

This is the nitrogenous base only found in rna

Astudent sees several ants walking up a wall following the exact same trail that an ant took earlier. she wants to apply the scientific method to determine how the ants detected the trail. which of these steps would come first in her application of the scientific method? perform an experiment by cleaning the scent away from part of the trail. draw a conclusion that the ants follow a scent trail. make a prediction about what the ants will do after she cleans away part of the trail. hypothesize that the ants are following a scent trail that the first ant left.

Introducing minvasive species to an ecosystem results in an increase in biodiversity is it true or false