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motikmotik
3 years ago
6

A zoologist finds a mysterious worm-like animal, and is trying to identify it. What characteristic would he need to find in the

embryo to be able to classify it as a protostome?
Biology
1 answer:
alukav5142 [94]3 years ago
5 0

to classify it as a protostome, zoologist must see for the mouth development in the embryo.

Explanation:

The protostome are the animals which are unique to their three germ layer in embryonic development, with the bilateral symmetry as they have the ability to fly with other protostome developments.

the one characteristic feature to distinguish them as the protostome, mouth part development is to be sought as the mouth develops but not the anus in the embryo. the mouth parts serves unique to the group and their feeding structures.

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A chemical imbalance in the blood can cause the heart to stop pumping blood, which in turn will cause other tissues and organs t
tatiyna

Answer;

B) all levels of organization within an organism are interdependent.

Explanation;

-The biological levels of organization of living things arranged from the simplest to most complex are: organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere.

The levels of organization are dependent on each other, for example, the organ systems rely on each other for many different things and cannot function without the other. e.g. The nervous and endocrine systems control the activities of the digestive, excretory, circulatory and respiratory systems. Organ systems need to work together to maintain homeostasis in the body.

6 0
4 years ago
Read 2 more answers
Which structure is found in all animals
tester [92]

Answer:

cells

Explanation:

These include structures such as the plasma membrane, cytoplasm, nucleus, mitochondria, and ribosomes

3 0
3 years ago
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Calculate the frequency of b cells specific for antigen a on day 36 if the antibody concentration on day 36 is about 8 × 103. (f
matrenka [14]
-The number of B cells producing the antibody is proportional to the concentration of that antibody.

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\frac{1}{100000} = 1 x 10⁻⁵ B cells

- on day 16, Antibody concentration is  2 × 10¹= 20 Antibodies
- on day 36, antibody concentration 8 × 10³.= 8000

20 antibodies ------------ 1 x 10⁻⁵ B cells
8000 antibodies--------------x

x= (8000 x 1 x 10⁻⁵)/ 20
x= 4x10⁻³ or 1 in 250 are <span>B cells specific for antigen A</span>
8 0
3 years ago
When all the values in a data set are written in order from least to greatest, the value that is in the middle, with an equal nu
Ierofanga [76]
I believe the answer you are looking for is median.

example:
2     4     6     |8|     10     12     14

median: 8
three on each side of "8"
5 0
3 years ago
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Is examination of the back an organ or body area examimnation?
maks197457 [2]
I believe it's the body area examination, since a 'back' isn't and organ

Hope this helpss
6 0
3 years ago
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