The graph shows data from ice cores. What has happened to carbon dioxide levels over time?
Atmospheric CO, (ppm)
Atmospheric Carbon Dioxide
350 from Law Dome Ice Cores
340
330
320
310-
300
290
280
1000
1200
1800
2000
1400 1600
Year (AD)
A. They have increased dramatically recently
B. They have gone up and down with no general trend.
C. They have decreased dramatically recently.
D. They have remained flat and steady.
Apex

i think its the first one

endo:

regulates body hormones, aldosterone, vasopressin

neural:

signal, regulates body using electric signals, reflex

endo has to do with hormones; aldosterone and vasopressin are both hormones. i also had this question and got it right : d

estuaries are the partially enclosed coastal bodies of brackish water formed at the mouth of sea where river meets an ocean. it is a transition zone between river and sea water so estuaries are influenced to both marine environment such as tides, waves and to riverine such as flow of fresh water and sediments. the mixing of sea and fresh water provide high level of nutrients, making estuaries a high product habitats.

many estuaries suffers degradation from a variety of human activities like erosion from deforestation, overgrazing, overfishing, drainage and eutrophication.

so from the above statement answers will be

1. false as estuaries are formed due to both brackish and freshwater.

2.true, due to high productivity estuaries are breeding ground for many marine species.

3. direct and indirect activities of man that contribute to pollution and deposition of sediments.