BIOLOGY HIGH SCHOOL

Two or more tissues together with a special job form a(n):heredity
brain
organ
neuron

Answers

Answer 1
Answer:

Answer:

Organ

Explanation:
Answer 2
Answer:

Answer:

organ

Explanation:

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How does summation operate in a post-synaptic cell? A). It adds up all of the previous action potentials and releases one of that value. B). Post-synaptic cells do not fire. C). Input from many cells is required for it to fire. D). Sodium ions are moved from one cell to the next in an additive way.

Answers

The way that summation operates in a post-synaptic cell is that the C) input from many cells is required for it to fire.

Keystone species play a key role in A. Niche specialization B. Mutualism. C. Community stability. D. Habitat destruction

Answers

Answer: The correct answer is C) Community stability.

Keystone species is an individual species or a group of species of plants and animals, which play a significant role in maintaining the structure of community and the functioning of ecosystem.

This means that when these species are removed from an ecosystem, they will result in the dramatic changes in the structure and functioning of the ecosystem.

Example-  In terrestrial habitats, fire ants behaves like a keystone species ( a predator keystone species) that suppresses the number of individuals and species of arthropods, which could have harmful effects in the agriculture.
it world by C: Community Stability

Where would you find the scales of birds?a. on their beaks
b. under their feathers
c. on their wings
d. on their feet

Answers


The correct answer is d - on their feet.

The scales found on birds are made of keratin, the same material that forms the beak, claws and spurs.

The scale are mainly found on the toes of the bird and also on the metatarsus. Some may be found a little up the ankle.

The scales of birds were thought to be similar to those  found on reptiles and mammals, but research done in recent times has shown they are somehow different.

 

Which first appear invertebrate or vertebrate

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vertebrate hope this helps

What part of a neuron carries nerve impulses away from the cell body

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Axon- A long fibre that carries impulses away from the cell body.

what happens during implantation? &The embryo is developed enough to be called a fetus at the end of which stage?

Answers

by the Time the zygote reaches the uterus, the dividing ball of cells has separated into two sections.The inner group of cells will become the embryo. The outer group will become the cells that nourish and protect it.
2. The embryonic period
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