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vovikov84 [41]
2 years ago
15

How did early land animals differ from those common today?

Biology
1 answer:
Zinaida [17]2 years ago
3 0

Answer:

Early land animals had both lungs AND gills, and their bodies consisted of few hard parts. Meaning they lacked things like an exoskeleton for instance. Animals today have either lungs OR gills and many have protecting hard parts of their bodies.

Explanation:

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Zigmanuir [339]

Answer and Explanation:

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5 0
3 years ago
Could you please answer question one please
kondaur [170]
The answer is c. diffusion only
7 0
3 years ago
Will award 70 points!
Verizon [17]

Answer:

Net photosynthesis- 3mm/20min- 1.5mm/10min

Cellular respiration- 1mm/15min- 0.66mm/10min

Gross photosynthesis = Net photosynthesis + Cellular respiration = 1.5+0.66 = 2.16 (mm/10min)

Rate of photosynthesis = (gross photosynthesis)6 = 2.16 *6 = 12.96 mm/hr

As we are measuring rate of photosynthesis in hr ,we should multiply gross photosynthesis with 6 (as we measured gross photosynthesis for 10 min).

Explanation:

4 0
3 years ago
Bryophytes never formed forests (mats, yes, but not forests) because ________. a. they possess flagellated sperms.
maria [59]

Answer:

c. They lack lignified vascular tissue

Explanation:

We know that forest consists of tall trees. In the tall trees the water and minerals are transported to the every part of tree through the lignified vasucular tissue. This tissue not only helps in transport within the tree but also provides some sort of mechanical strength due to the presence of lignin it its walls. On the other hand bryophytes are non-vascular plants which means they lack vascular tissue and thus a mechanism for long distnace transport of water and minerals is absent in them. So they can't be taller as a tree and thus can't form forest.

8 0
3 years ago
What two systems can combine to ensure the life activity of movement
Sidana [21]

A simple example is the connection between the circulatory and respiratory systems. As blood circulates through your body, it eventually needs fresh oxygen (O2) from the air. When the blood reaches the lungs, part of the respiratory system, the blood is re-oxygenated.

hope it is write i kind ask my friends

5 0
3 years ago
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