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Maksim231197 [3]
3 years ago
9

Most ______ immunizations must be re-administered on a regular basis.

Biology
2 answers:
Nataliya [291]3 years ago
7 0
Vaccine immunization is the correct answer I really hope that this helps and 
ankoles [38]3 years ago
7 0

Artificial, i think ‍

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What are some(4) similarities between dark field microscopes and bright field microscopes?​
guajiro [1.7K]

Answer:

Explanation:

Bright field microscopy is the conventional technique. It is suitable for observing the natural colors of a specimen or the observation of stained samples. The specimen appears darker on a bright background. Darkfield microscopy shows the specimens bright on a dark background

6 0
2 years ago
which of the following method is used to prevent soil erosion? tilling, contour farming, fertilizer, worms
Verizon [17]

Answer:

contour farming

Explanation:

Contour farming is the method of growing crops on sides of hills, mountains and steep slopes by planting on graduated terraces built into the slope. This method effectively reduce soil erosion and water loss and maximizes arable land area. In most of the systems the contours are low, flat ridge of earth built across the slope, with a channel for runoff water just above the ridge. In areas where soils are able to take in water and rainfall amount is relatively low, level terraces may be used to reduce soil erosion too.

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3 years ago
Carbon dioxide and oxygen enter and exit a leaf by diffusion. which structure(s) on a leaf allow(s) this process to happen?
Montano1993 [528]
The stomata and their guard cells allows this happen.

Stomata is like a hole or gap on a leaf, most of them are present in a bottom side of the leaf, since waxy cuticle is not present over there. And 2 guard cells make up a stomata.

Guard cells are able to control the size of the stomata, depending on the situation. For example, the guard cells close up during day time because a lot of sunlight may cause more water loss.

In conclusion, guard cells and the stomata are the main structures that allow carbon dioxide and oxygen (water too) diffuse in and out of leaves.
3 0
3 years ago
This is a map of a _ landform because ?<br><br> ASAP
andrew-mc [135]

Answer:

This is a map of a Mountain landform because the rings get smaller until the top of the mountain. Also the altitude goes up until it reaches the top.

Explanation:

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3 years ago
Your normal heartbeat before exercise is called your ____________________.
defon

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Heart rate i think

Explanation:

6 0
3 years ago
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