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Sunny_sXe [5.5K]
3 years ago
6

Identify the statement that correctly describes the change in body size between Homo habilis and Homo erectus.

Biology
1 answer:
mina [271]3 years ago
4 0
Involved a dramatic and sudden increase
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A(n) ______ is a plant organs that consists of an embryo, tissues, and a protective coating.
NikAS [45]

Answer:

the answer for this question is seed

Explanation:

8 0
3 years ago
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The arrangement of homeotic genes along chromosomes of vertebrate and invertebrate animals corresponds to the expression pattern
Keith_Richards [23]

The arrangement of homeotic genes along chromosomes of vertebrate and invertebrate animals corresponds to the expression pattern of the genes along the anterior-posterior axis of the developing embryo.

<h3>What are homeotic genes?</h3>
  • Homeotic genes are a group of body pattern forming genes which control the development along the anterior- posterior axis of the developing embryo.
  • These encode transcription factors which control and specify the genes involved in body patterning. These provide identity to the segments during embryo formation.
  • Genes located in the 5’ end act on posterior side whereas the genes on 3’ end act on anterior region.
  • Homeotic genes are evolutionary conserved and control body specification, patterning and differentiation.
  • The loss of function of any of the gene changes the body pattern and affects the development.

Learn more about homeotic genes here:

brainly.com/question/23669464

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7 0
1 year ago
Which statement must be true about the organism?
Artyom0805 [142]

Answer:

If we're talking about human organism then

It is multicelular.

It has a backbone.

It contains cells without nuclei.

Explanation:

human as almost all animals in the world is multicellular meaning they have more than one cell (some bacterias has only one)

backbone or "vertebra" is the is the bone of our back who supports us making us stand up.

Yes our cells contain nuclei , The nucleus contains nucleoplasm, a component where it is immersed in genetic material and as structures that are important for the performance of its functions

And finally our body don't have radial symmetry, radial symmetry is when you can "cut" the image in more than one piece keeping the symmetry in every side, some animals with radial symmetry are the starfish and the jellyfish.

5 0
2 years ago
What organism is scientist tyrone hayes searching for in the wetlands
Margarita [4]

For biologist and herpetologist Tyrone Hayes, scientific breakthroughs don't begin and end in the laboratory. They also come from the field. Which is why, more often than not, you'll find Hayes wet, muddy, and knee-deep in an African swamp at 2 a.m., the time when the frogs come out.

Hayes grew up in South Carolina, and, as a boy, one of his favorite pastimes was tracking down the region's abundant turtles, snakes, and toads. That abiding fascination led Hayes to earn an undergraduate degree in organismic and evolutionary biology from Harvard University. He later received a Ph.D. in integrative biology from the University of California, Berkeley, where he currently serves as a professor.

Hayes says an interest in frog hormones, specifically those of a tiny reed frog common in Ethiopia and Uganda, sparked his interest in his current fieldwork. "Surprisingly, frog hormones are very similar, and in some cases identical, to human hormones," he says. "So what affects a frog may also affect humans."

It was during a night in the boggy African bush that Hayes's flashlight revealed an unexpected discovery: Several members of the reed frog genus had changed color. Males, which are normally green, had taken on the reddish background and white spots of females.

Seeking to understand why, Hayes arrived at a theory: During the metamorphosis from tadpole to adult, frogs are very sensitive to changes in their environment, including chemicals in the water or in their food supply. So the change in coloration indicated that the frogs' extremely thin, sensitive skin was reacting to contaminants in the water. Thousands of frogs later, Hayes and his research team have proved the theory correct.

Reed frogs, indeed, serve as tiny red flags that can warn when dangerous, even cancer-causing chemicals are present in a water source. These harmful substances may contain or act like hormones, triggering the color transformation. Contaminants include plastic by-products, pesticides in crop sprays such as DDT, and synthetic hormones such as DDS. Because they cannot be broken down during sewage treatment, the toxins flow into marshes and lakes.

"This is the same water people cook and bathe with," Hayes notes. "We've found developmental changes in tadpoles when water contains contaminants 50 times lower than what's allowed in U.S. drinking water. If chemicals in such low concentrations can impact amphibians, mammals may also be affected."

Hayes realized his simple observation could have enormous practical applications: Reed frogs could become a low-cost way to test for water pollution in developing countries. Local residents would only need to raise the frogs in questionable water sources and observe their color as adults to check for contaminants.

Hayes's findings reveal a crucial new link between conservation and health.

7 0
3 years ago
"What's happened to me?" he thought. It wasn't a dream. His room, a proper human room although a little too small, lay peacefull
Sidana [21]

Answer:

what was the question this is a really good story

Explanation:

what is the question this is unfiltered and un-questionable

8 0
3 years ago
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