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ipn [44]
3 years ago
8

The fossil Lucy (Australopithecus afarensis) is significant because, at _____ years old, hers is the first hominin species to __

___.
Biology
2 answers:
NikAS [45]3 years ago
7 0
The answer is 3.2 million years old and the first species to be fully bipedal. Hope this Helps:)))
Lady_Fox [76]3 years ago
7 0
3.2 million years old 
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vovangra [49]
1. The correct answer is; are body cells is going to shrink. <span>Salty seawater is a hyperosmotic solution, meaning that it has more solutes than the cell inside. The water will move (from the cell) via osmosis in order for the solutions to reach equilibrium. Also, salty solution exerts more pressure on the of the cell, so the cell will shrink.</span>
<span>
2. The correct answer cells in the fish will stay the same size. This will occur because both solutions, freshwater lake and river have similar (or equal) solute concentrations. Those solutions are called isosmotic. There is no movement of water or the solutes, so the cell stays the same.</span>

3. The correct answer is to swell. <span>This will happen because sea star egg has the same solute concentration as its first environment-ocean meaning that this solution is hyperosmotic comparing to the lake (ocean is saltier than the lake, it has more solutes). When you put the sea star egg in the lake, the water from the lake will move (via osmosis) into the egg, to reach equilibrium. Water will cause the cell to swell.</span>
7 0
3 years ago
Read 2 more answers
Which statement is an example of a scientific theory?
Vladimir79 [104]

Examples of a scientific theory

Scientific theories are testable and make falsifiable predictions. They describe the causes of a particular natural phenomenon and are used to explain and predict aspects of the physical universe or specific areas of inquiry (for example, electricity, chemistry, and astronomy).

3 0
3 years ago
Which of the following can reduce biodiversity within a natural environment?
zepelin [54]
The answer is either b or c because bio means life and diversity means different and the ants stinging other insects get  rid of a population and maybe another species lives off of the species that ant killed.                                                                                                     
When the grasslands are converted into housing projects it gets rid of everything so no trees no animals and no diversity of living organisms other than humans
6 0
3 years ago
Read 2 more answers
The frequency of a certain trait in a population will increase over many generations if which of the following is
Zigmanuir [339]
C) As the trait will then pass to others without it and through natural selection will become abundant
7 0
3 years ago
In which organelle are most molecules of ATP produced by the cell
SVEN [57.7K]

Answer:

Eukaryotic ATP production usually takes place in the mitochondria of the cell.

Explanation:

This ATP production by the mitochondria is done by the process of respiration, which in essence is the use of oxygen in a process which generates energy. Most of the ATP of a eukaryotic organism is made in the mitochondria during the last phase of cellular respiration that is called the electron transport chain (ETC). A mitochondrion is an organelle within a eukaryotic cell.

6 0
4 years ago
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