Question

Which occurs as part of gas exchange?
oxygen is exhaled
carbon dioxide is inhaled
carbon dioxide diffuses from the trachea to blood in capillaries
oxygen diffuses from alveolar sacs to blood in capillaries

Answer 1

it is the last one, "oxygen diffuses from alveolar sacs to blood in capillaries". because the 1st and 2nd ones don't really make sense, and the 3rd one isn't true, cause if it was we wouldn't need any lungs, so your best answer is the 4th one

Answer 2

okay thanks

Answer 3

oxygen diffuses from alveolar sacs to blood in capillaries

Answer 4

can you help me with a few more

Answer 5

sure

Answer 6

yes

Answer 7

During a trip to the Galapagos Islands, which observation led Charles Darwin to suspect that organisms change over time?
Island finches were able to breed with mainland species.
Island finches resembled mainland finches, but were not the same species.
Island finches resembled extinct species from other islands around the world.
Island finches did not have beaks of the same size and shape.

Answer 8

the last option

Answer 9

the last one cause in Darwin's journal he talks about and show the different types of finches and there different types of beaks

Answer 10

its there in class 7 science book too.

Answer 11

Which is an effect of a compromised immune system?
decreased antibody production
improved ability to fight disease
increased lymphocyte production
reduction in pathogens entering the body

Answer 12

compromised?

Answer 13

i didnt get it properly.......

Answer 14

This passage is a narrative written in verse that tells the story of a larger-than-life hero in a grand, elevated style. Based on this information, which genre does The Aenid belong to?

drama

epic poetry

prose

historical fiction

Answer 15

The answer is B Epic poetry.

Answer 16

the first one, a decreased in anti-bodies is a sign of a comprised immune-system @RosePetal_