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BARSIC [14]
3 years ago
5

Scientists have discovered a fossil skeleton of a whale-like creature that lived in the early Eocene epoch. The skeleton shows a

n organism with large fore and hind limbs with distinct toes. Fossil skeletons of closely related species from later periods show organisms lacking hind limbs. Which conclusion does this observation best support?
A. Ancestors of whales may once have been able to walk.

B.Ancestors of whales had fewer bones than modern whales.

C. Whales and their ancestors have always been ocean dwellers.

D. Whales and their ancestors have always been the largest living ​
Biology
2 answers:
soldier1979 [14.2K]3 years ago
4 0
A. Ancestors of whales may once have been able to walk.
igomit [66]3 years ago
4 0

Answer:

A. Ancestors of whales may once have been able to walk.

Explanation:

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damaskus [11]

The symptoms given may be a manifestation of Polycystic Ovary Syndrome (PCOS), which is a common endocrine system disease among females.

Symptoms are the following:

<span>1. </span>Menstrual disorders: oligomenorrhea (irregular period) or amenorrhea (cessation of period), which start around the time of the first period (menarche)

<span>2. </span>Infertility: which results from anovulation (ovaries are unable to release an egg cell during ovulation)

<span>3. </span>Obesity: at least 40% of females with PCOS are obese

<span>4. </span>Hirsutism (excessive body hair where hair is usually minimal or absent): big amount of masculinizing hormones in women with PCOS may cause hirsutism

6 0
3 years ago
A frog with a mass of 0.29kg hops up in the air. At the highest point in the hop, the frog has a gravitational potential energy
PtichkaEL [24]

Answer:

0.27m

Explanation:

To get the energy

Potential energy= Mgh

M is Mass

G is acceleration due to gravity

H is height..

M= 0.29kg, h= ?

P=0.759. g=9.8m/s

Therefore,

0.759=0.29×9.8×h

H= 0.759÷2.842

H= 0.27m

8 0
3 years ago
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3 0
3 years ago
A teacher thinks that students do better on tests when they get to write essays instead of multiple choice. He thinks this becau
Juli2301 [7.4K]

Answer:

A teacher thinks that students do better on tests when they get to write essays instead of multiple choice. He thinks this because the students can explain their reasoning. On multiple choice questions, students cannot do that and he cannot give students partial credit. The teacher gives one class multiple choice questions and the other essay questions. He compares the scores after each class. Identify the: INDEPENDENT VARIABLE, DEPENDENT VARIABLE, HYPOTHESIS, EXPERIMENTAL GROUP, and CONTROL GROUP.

Essay question is the independent variable while the multiple choice is dependent variable. The hypothesis remains the fact that his thought about students performance in essay questions better than multiple choice questions, experimental group remains both essay and multiple choice questions and the control group is the essay question

Explanation:

3 0
3 years ago
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