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Biology

Guest

Two birds that look very similar to each other have always been considered two distinct species based on differences in their body size and in where they live. A group of ornithologists studying the two species begins to think they might not be separate species based on observed behavior. What would be the best next step regarding this new hypothesis?

Run DNA tests on the two species to see how genetically similar they are.

Publish their conclusions in a scientific journal to officially change their classification.

Trace the birds' ancestry in the fossil record to see if they diverged into two species.

Compare embryos of the two birds to see if they differ during development.

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Biology

Ignacio

This system is used all over the world. Why do you think Latin is used instead of a more modern language?

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Biology

Elena Browning

Which of the following cellular adaptations assist many unicellular organisms with locomotion?

A. Mitochondria

B. Chloroplasts

C. Cilia

D. Ribosomes

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Biology

Guest

The larval forms of certain taenia species, which typically infest muscles of mammalian intermediate hosts is also called a

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Biology

Shyla Hart

Which sphere experiences changes over time

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Biology

Liana Kerr

2. How do living things grow? What is the

main factor that limits cell growth?

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Biology

Heaven

What do you notice about the width of an artery wall versus the width of a vein wall? Why does this make sense given the function of the vessels?

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Biology

Scarlet Mcintosh

explain how the runoff waters from farm to land and golf courses might be dangerous to organisms living in ponds, rivers, or streams.

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Biology

Adyson Cooley

During which period of development is the unborn baby most at risk of developing a structural defect due to the effects of a teratogen

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Biology

Skittles

A green plant absorbs light. A frog eats flies.

These are both examples of how organisms

(1) obtain energy

(2) escape predators

(3) produce offspring

(4) excrete waste

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Biology

Nathan

How do birth rates and death rates influence the population size

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Biology

Tucker Lyons

Which of the following is a relatively new disease? a. polio, b. smallpox, c. west nile virus, d. all of the above

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Biology

Solomon Pugh

Children's intakes of which nutrients typically fall below recommendations?

a. vitamin d and iron

b. vitamin a and vitamin c

c. fat and fiber

d. sodium and potassium

e. vitamin b6 and protein

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Biology

Hayden Fuller

Which of the following best describes Mendel's idea of segregation? A. Each parent may pass on one or two factors for each trait to its offspring. B. Male offspring receive chromosomes only from the male parent. C. Female offspring receive chromosomes only from the male parent. D. Each parent passes on only one factor for each trait to its offspring.

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Biology

Megan Gill

Which of the following have been changed or altered

due to climate change.

A. Droughts

B. Flooding

C. Melting of polar ice caps

D. All of the above

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