BIOLOGY HIGH SCHOOL

An anthropologist finds a fossil that is 4 million years old. Its pelvis suggests it walked upright. Which species could the specimen belong to?Australopithecus africanus
Australopithecus afarensis
Homo habilis
Homo erectus

Answers

Answer 1
Answer: Australopithecus afarensis is hominin discovered in the Afar region in Ethiopia. He lived between 4 and 3 million years ago. The most famous fossil is named Lucy. Australopithecus africanus was dated as living between 3.3 and 2 million years ago. Homo habilis is much younger: 2.1 - 1.5 million years ago. Homo erectus is the youngest ( from 1.9 million - 70,000 years ago ). Answer: The specimen could belong to B ) Australopithecus afarensis.
Answer 2
Answer: australopithecus afarensis

Related Questions

To living organisms, the most dangerous debris from tephra is probably _____, because it spreads so widely. huge volcanic boulders volcanic ash volcanic bombs the flood of water and debris
An act of fertilization in which genetic information is transferred between cells is called _____.xternal fertilizationinternal fertilizationconjugationpollination
Which of these statements is NOT a characteristic of the cladistics system?It shows the "rank" of the organism. It shows the probable sequence of origins. It shows shared, derived characteristics.
What is meant by "nutrient limitation"?
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Which is a disadvantage of using DNA technology?edible vaccines
phytoremediation
herbicide tolerance
gene transfer to nontarget species

Answers

Answer:

The answer is D. Gene transfer to non-target species.

Explanation:

Using DNA technology we have made several genetically modified crops called GM crops. But sometimes the transgenic trait or gene may effect the non-target species. For example Bt-crops were found damaging the soil health. These pest resistant Bt-crops release Bt toxin near the soil root zones. High levels of Bt toxin can affect the health of soil as well as the soil insects. Hence GM crops must be monitored for the effects on non-target species.

Answer:

The correct answer is: Gene transfer to non-target species. It is believed within the scientific field that these risks directly affect environmental impacts and need to be assessed on a case by case basis and recommended post-release ecological monitoring. 

Explanation:

Transgenic crops could possibly entail positive or negative indirect environmental effects through changes in agricultural practices such as pesticide and herbicide use and cropping patterns. Agriculture affects the environment it does not matter which type we are talking about. Then it is normal to conclude that the use of new genetic techniques in agriculture will also affect the environment. 

Explain what has to happen to join two monosaccharide units into a disaccharide.

Answers

Dehydration synthesis is the process by which two monosaccharide are joined to form a disaccharide.

Monosaccharides, known as simple sugar, is the simplest form of carbohydrates. Its basic molecular formula is CH2O. Monosaccharides are glucose, fructose, and galactose. Its primary function is to be the source of energy of living organisms. It is also the primary requirement for the formation of disaccharides and polysaccharides.

Disaccharides are formed when two monosaccharides are bonded together through a covalent bond. Common Dissaccharides are sucrose  (glucose+fructose) or table sugar, maltose (glucose+glucose), and lactose (glucose+galactose). Its primary function is to provide nutrition for monosaccharides. Sugar in food is mostly dissaccharides.

Which of the following is an example of how enzymes are catalyst?a)Enzymes can alter the free energy change (ΔG) for a chemical reaction.

b)Enzymes increase the free energy of the reactants to make the reaction go faster.

c)Enzymes provide the activation energy for the reactions they facilitate.

d)Enzymes lower the activation energy so that reactants absorb enough energy to reach transition state.

Answers

It’s D girlyyyyyyyyyyy

Which cell has both a cell wall and a cell membrane?

please answer quickly its urgent

Answers

Answer:

Plant Cell

contains both

Which statement best describes a major difference between different types of elements?A. Only some elements are composed of atoms with electrons.
B. Only some elements have atoms with subatomic particles.
C. The atoms of different elements have different locations for their nucleus.
D. The atoms of different elements have different numbers of protons and electrons.

Answers

Answer:

option number C may be the best answer..

Energy sustainability can best be achieved by using ______.

Answers

Following are the choices:

a. nonrenewable energy sources b. renewable energy sources

c. carbon sequestration d. recycled plastics

The correct answer is:

b. renewable energy sources

Explanation:

Renewable energy is energy that is obtained from renewable resources, which are naturally provided on a human timescale, such as sunlight, wind, rain, tides, waves, and geothermal heat. Renewable energy compares to the provision of energy via renewable sources which are simply replaced fast enough as being used.
If this question has the same set of options like the previous ones, here are the following choices:
a. nonrenewable energy sources        b. renewable energy sources
c. carbon sequestration                       d. recycled plastics

The answer would be: 
Energy sustainability can best be achieved by using renewable energy sources.
>To create a sustainable future, we need to concentrate on renewable energy resources, such as wind power.
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