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Alexandra [31]
3 years ago
8

A blastula is

Biology
1 answer:
Ymorist [56]3 years ago
4 0
B) a hollow ball of cells

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Activated t cells and macrophages release ________ to mobilize immune cells and attract other leukocytes into the area.
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They both release CYTOKINES :)

Haha :) I know this is right because I just got quizzed on it before spring break
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3 years ago
Why will the footprints left by Apollo astronauts last for centuries?
Nastasia [14]

Due, to know life on the moon there would be nothing to mess with the footprint, but the main reason why these footprints are going to last centuries is because "there is no weather." Since how there is no weather on the moon which means no wind there is no factors that could affect the footprint.

Hope this helps!

7 0
3 years ago
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What causes the formation of graded beds of sediment?​
Mamont248 [21]

In geology, a graded bed is one characterized by a systematic change in grain or clast size from one side of the bed to the other. Most commonly this takes the form of normal grading, with coarser sediments at the base, which grade upward into progressively finer onesI just learned about this in our rocks and minerals unit for science,

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3 years ago
The carbon cycle is one of earth's natural resources that enables all living organisms to inhabit this planet. It is a vital res
muminat
The carbon cycle is one of earths natural resources that enables all living organisms to inhabit the planet. For example, with out this vital resource we would run out of oxygen. Flora (plants and trees) use the carbon that is a by product of cellular respiration by fauna (humans and animals) to reproduce oxygen and this cycle continues. which is what keeps all living organisms in harmony and alive.
4 0
3 years ago
What causes waves, tides?
Alja [10]
<h3>✽ - - - - - - - - - - - - - - - ~Hello There!~ - - - - - - - - - - - - - - - ✽</h3>

➷ Waves are commonly caused by wind. However, tides are caused by the gravitational attraction of the sun and moon on the oceans.

➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

↬ ʜᴀɴɴᴀʜ ♡

8 0
4 years ago
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